GRADE 12 MODEL QUESTION PAPER 2020-21

A quota is a government-imposed trade restriction that limits the number or monetary value of goods that a country can import or export during a particular period. Countries use quotas in international trade to help regulate the volume of trade between them and other countries. 33. Institutional credit for agriculture has gradually increased. Cooperative Banks, Regional Rural Banks and Commercial Banks are the main sources of agricultural credit. The flow of agricultural credit since 2003-04 has consistently exceeded the target. The four major sources of institutional credit are co- operatives, commercial banks, regional rural banks and government departments. 34. Poverty Alleviation Programmes aims to reduce the rate of poverty in the country by providing proper access to food, monetary help, and basic essentials to the households and families belonging to the below the poverty line. As per the Planning Commission of India, the level of poverty in a country can be estimated based on the consumer expenditure surveys that are conducted by the National Sample Survey Office (NSSO) under the Ministry of Statistics and Programme Implementation. The PAPs also were not fully Effective, Neglect of agriculture, Urban Concentration of Growth Process, Economic colonization, Spread of Consumerism, Lopsided Growth Process, Cultural erosion are some of the issues associated with PAPS. OR OR Education plays a significant role in economic development as follows: Education increases the accessibility of people to Page 1 of 1

modern and scientific ideas. It increases the efficiency and ability of people to absorb new technology. It creates awareness of the available opportunities and mobility of labour (i) It improves productivity and efficiency. (ii) It improves mental horizon of the people by which they try to improve their health status. (iii) Common educated masses contribute in the development of the country. (iv) It makes them good citizen that helps in choosing an intelligent government. (v) It promotes science and technology by which people have a scientific outlook. (vi) It produces skilled and trained workers. Vi In this way education helps in human capital formation. Page 1 of 1

​MODEL EXAMINATION 2020 – 21 TIME-3 hours CLASS XII M.M-70 HOME SCIENCE(064) GENERAL INSTRUCTIONS- 1.All questions are compulsory. 2.There are total 36 questions. 3.Question paper is divided into three sections-A, B and C. 4.Section A has question no.1to 14 (objective type questions) and are of 1 mark each. 5.Section B has question no. 15 to 21 (case study based multiple choice questions) and are of 1 mark each. 6.Section C has question no.22 to 27 of 2 marks each, question no.28 and 29 of 3 marks each, question no.30 to 33 of 4 marks each and question no.34 to 36 of 5 marks each. 7.Internal choices are given in some questions. 8.Support your answers with suitable examples wherever required. SECTION A (OBJECTIVE TYPE QUESTIONS) Marks S.No.​ ​Multiple choice questions 1. Identify the​ method used to process food as little as possible in order to retain 1 the quality of fresh food. a) Preserved foods b) Minimally processed foods c) Medical foods d) Formulated foods OR The intergovernmental body formed to protect the health of the consumers and facilitate food and agriculture trade. a) CAC b) ISO c)ISI d)WTO

2. A person who takes risk for converting a novel idea in to reality. 1 a) Businessman 1 b) Entrepreneur c) Partner d) Starter 3. In 1810, _________________ developed the method of canning. a) Louis Pasteur b) Napoleon Bonaparte c) Nicolas Appert d)Harvey Levenstein 4. The department responsible for maintaining cleanliness in the kitchen and 1 to wash the pots and pans used. a) Assistant Waiter b) Dish Washer c)Lobby Manager d) Kitchen Stewarding OR You got a job in hotel and your responsibility is maintain cleanliness, maintenance of guestroom, corridors, staircase and floor pantries You must be appointed as_____________________ a) Floor supervisor b) Room attendant c) Desk control supervisor d) Assistant housekeeper 5. Nationwide communication campaign implemented in cooperation with 1 Indian Railways for generating awareness about HIV/AIDS. a) Red Ribbon Express b) Red Rose Express c) Ribbon Red Express d) Ribbon Rose Express

6. Match the following- 1 A. High risk food B. Medical food i) Lycopene C. Formulated food ii)Biscuit D. Functional food iii)lactose free milk Pick the correct option- iv) protein rich food a) A iii, B i, C iv, D ii b) A iv, B iii, C ii, D i c) A iv, B i, C ii, D iii d) A iii, B iv, C ii, D i 7. The organism that exists in the intestinal tract of animals, raw milk and eggs 1 which cause food poisoning or infection. a) Salmonella b) Lactobacillus rhamnosus c)Staphylococcus aureus. d)Lactobacillus reuteri 8. The diet that are adjusted to meet the medical needs of patient. 1 a) Balanced diet b) Regular diet c) Modified diet d) Liquid diet Fill in the blanks​- 9. ____________ is used to meet the demand for an interactive satellite -based 1 distance education system in India. 10. Adjustment of human and machine is ____________. 1

11. Identify the craft and name the state in which it is practiced. 1 OR Identify the painting and name the state where it is popular. 12. Sita has to buy a silk saree for a marriage function. Which standardized mark 1 she should check on the saree. 13. Predict two benefits of campaign. 1 14. As per the NCF (2005) write two basic objectives of ECCE. 1 OR List any two substitute child care. SECTION B (CASE STUDY BASED QUESTIONS)

M​ alnutrition affects all age groups but is more common especially among children. Many consequences of malnutrition may be hidden. In every society even in developed and industrialised countries suffers from insufficient intake of macro nutrients. A large proportion of children (and adults) suffers from micronutrient deficiencies in varying degrees of severity. The micronutrients of most concern are iron, vitamin A, iodine, folic acid, B12, calcium, vitamin D.

Q15. Micro nutrient deficiencies are referred 1 Q16. as- Q17. a) Goitre Q18. b) Hidden Hunger c) Protein energy malnutrition d) Anemia Which vitamin deficiency is associated with night blindness? 1 a) Vitamin C b) Vitamin D c) Vitamin B 12 d) Vitamin A When the weight of the child is not adequate relative to height, this is 1 termed as- a) Underweight b) Stunting c) Wasting d) Protein energy malnutrition _____________ is caused by insufficient intake of the macro nutrients. 1 a) Goitre b) Iron deficiency anemia c) Protein Energy Malnutrition d) Vitamin A deficiency

Design is a term commonly used to describe the appearance and appeal of any article. Elements of Design are the tools of the Art. These are colour, texture, and line, shape or form. Colour is all around us in many forms. The identity of the product is most often attributed to colour. Colour reflects the season, events and the spirit of people. Colour is an important part of Fashion. Colour can be seen in fabrics in various design forms. Designers carefully choose fabric colours to make a definite statement. Certain basic colour schemes are used as guide for combining colours. Colour scheme are best studied with reference to the colour wheel. Lightness or darkness of a colour is described in terms of ______ Q19. a) Value 1 b) Intensity c)Hue d)Complementary Yellow-orange, red-orange, and yellow-green are examples of_______. 1 a) Intermediate or Tertiary colour Q20. b) Secondary colour c) Primary colour d) Triadic colour Q21. When black colour is added to any other colour it is called as_____________ of a colour. a) Shade b) Tone c) Tint b) Hue 1

SECTION C 2 22. What are the aims of Kasturba Gandhi Balika Vidyalaya (KGBV)? 2 OR 2 Illustrate with an example which shows the importance of ergonomics in work place . 23. Enlist any 4 nutrition programme operating in our country. 24. Write any 4 important service offered by staff in a front office. OR Elaborate on the four stages of Guest cycle. 25. What are the two aspects of care and maintenance of fabrics? 2 26. What are the essential features of Development Communication? 2 27. What are the services provided by ICDS to meet the needs of vulnerable 2 children? 28. Give any two ways each to create balance and rhythm in a frock of 5year old 3 girl. 29. Why are youth vulnerable? Give any two reasons to support your answer. 3 Name any two programmes operating in our country for youth. OR Describe any two programmes operating in our country for elderly and describe about two skills need to develop to pursue a career in management of institutions and programmes for children /youth/elderly. 30. Enumerate any four important knowledge and primary requirement needed 4 when preparing for a career in the field of care and maintenance of fabrics. OR How are the laundry in hospitals different from a hotel? 31. A food hazard can enter/come into the food at any stage of the food chain, 4 therefore, adequate control throughout the food chain is essential. Explain three ways with two features of each to ensure food safety and quality. Also state two importance of FSSA,2006.

32. Write any four principles given by NCF (2005) to be kept in mind while open 4 up an institution for children. List four skills an ECCE worker must have. 33. Elaborate on four knowledge and skills required by a professional, in the stage 4 where food as a material and food product development. 34. Discuss the various strategies that can be adopted to combat public 5 nutritional problems. Compare two advantages and disadvantages of each. 35. One major problem of consumer is lack of information of available products. 5 Explain four each responsibilities and rights of consumer in this context. OR Your friend wants to pursue career in consumer related field. Guide him/her about five each skills and career opportunities of this field. 36. What do you understand by the term fashion merchandising? Describe 5 various levels of merchandising?



Answer key 1.b) Minimally processed foods or a) CAC 2. b) Entrepreneur 3.​ c)​ Nicolas Appert 4. d)​ K​ itchen Stewarding Or a) Floor supervisor 5. a) Red Ribbon Express 6.a) A iv, B iii, C ii, D i 7. a)Salmonella 8.c) Modified diet 9.EDUSAT 10.Ergonomics 11.Bamboo craft of Assam Or Warli Painting of Maharashtra 12. Silk mark 13.a)Prepare for school (Any 2) b)Holistic development of child c)Providing support services for women and​ c​ hildren 14.Creeche , Daycare 15. b)Hidden Hunger 16.​d) Vitamin A 17.c) Wasting 18. c)Protein Energy Mal nutrition 19. Value 20. Intermediate or Tertiary colours

21. Shade 22. to bring never enrolled and drop out student from rural and urban areas. OR For a person who does office work sitting on a chair that does not conform to ergonomic safety may cause back pai which will effect the work and productivity. 23.a) ICDS (Any 4) b) Nutrient Deficiency Control programme. ​c) Food Supplementation programmes like mid-day meal programme. d) Food security programmes. e) Self employment and wage employment schemes. 24)a)Welcoming guest (Any 4) b)Registering guest and allocating room c)Preparing and settling bills d)Porter services e)Issuing room key to guests etc . OR a) Pre arrival stage b) Arrival stage c)Occupancy d) Departure 25)a) keeping the material free of physical damage and rectifying any damage that may have occurred during its use. b) Retaining or refreshing appearance in terms of removal of dirt and stain and retaining the textural and visual characteristics. 26) It is oriented to socio economic development and happiness of the people and community at large. b) It aims at giving information and educating the community. c)It is based on the audience characteristics and their environment.

d) It combines suitable mass media and interpersonal communication channel for greater impact. 27)a) Non formal pre school education to children aged 3-6 years b) Immunization c) Health check up d) Referral services e) Nutrition, health and hygiene education to mothers. f) Supplementary Nutrition 28)Rhythm- repetition, radiation Balance -formal ,informal 29) Peer pressure, unable to get support from family, substance abuse, lack of knowledge and sexual and reproductive health, livelihood and marriage followed by raising a family. Programmes operating for youth- The service scheme, Nehru Yuva Kendra Sangathan, Scouts and Guides, Promotion of Adventure. (Any Two) OR Programmes operating for Elderly-National Old age pension scheme, Old age home, Respite care homes and continuous care home for elders (AnyTwo) Skills- People skills and administrative skills. 30.Primary requirement- knowledge of material, knowledge of process involved, knowledge of chemical and reagents used, working knowledge of machinery and its function Knowledge – Proce of laundry ,stain removal,role of water , finishing treatments ,folding (Any 4) OR In Hospitals – Importance to hygiene, cleanliness, disinfection, b) Ironing and pressing may not done on perfection. c)repair and mending may not form apart of service required d) quantum of work ,especially for bed linen is more for hospitals compared to hotel.

In Hotels- aesthetic and final finish is more important, b) final finishing of laundered goods are emphasised ,c) have to care of guests personal laundry when required d) quantum of work ,especially for bed linen is much lesser in hotels. 31. Food safety and quality can be ensured through-a) Good manufacturing practices (GMP) b) Good handling practices c) Hazard Analysis Critical Control Point (HACCP) Two importance of FSSA 2006 are- 1) To regulate storage manufacture, distribution, sale and storage of food. 2)To ensure availability of safe and wholesome food for human consumption 32. Principles- Play as the basis of learning b) Art as the basis of learning c) Mix of formal and informal interactions d) Use of local materials ,arts and knowledge Skills – a)An interest in children and their development b) Capacity and motivation for interacting with children c) Enthusiasm for activities d) Willingness and interest in answering to children queries. 33.Food as a material- a) Seasonal availability of food stuffs b)Nature and properties o food c) Nutritional content and its analysis d) Food hygiene and food safety Food product development – a) Knowledge of product specification and testing it b) Assessment by sensory methods c) packaging of marketable products d) Hazard Analysis Critical Control Point (HACCP) 34. Strategies -a) Diet or food-based strategies b) Nutrient based approach or medicinal approach Diet or food-based strategies-Advantages : (Any Two) cost effective , long term benefits ,no risk of overdose and toxicity. Disadvantage- (Any two)time consuming, requires change in eating behaviour, requires research participation of food industry. Nutrient based approach or medicinal approach - Advantages: (Any Two) short term strategies, timely

,sustainability . Disadvantage: expensive ,narrow scope of coverage. 35.Rights – Right to be informed ,Right to seek redressal, Right to be heard, Right to choose (Any 4) Responsibilities-( Any 4)(a)consumer should have responsibility towards regularly updating the knowledge on various laws and legislative provisions made by the government. (b) consumer should be honest in all their dealings and must pay for all their purchases. (c) while purchasing ,should read all information given on label and brochure. (d) to assured of quality he should buy products with standardisation mark. OR Skills required – (Any 5) (a) knowledge about consumer protection mechanism and redressal agencies (b) good communication and interpersonal skills (c) empathetic and understanding attitude (d) good listener (e) willingness to help fellow customers (f) creative in developing programmes Career opportunities- (Any 5)(a)work in government organization (b) work in voluntary consumer organizations (c) work with market research organization (d) work with consumer division of corporate house that deal consumer complaints and suggestion. (e) work in National consumer help line for consumer counselling. 36.Fashion merchandising – refers to the planning required to have the right merchandise at the right time, at the right place, at the right price and with right sales promotion, If all these conditions are planned , one can achieve maximum profit. Levels of merchandising – (a)retail organisation merchandising (b) buying agency merchandising (c) export house merchandising.

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MODEL EXAMINATION 2020 – 21 INFORMATICS PRACTICES (065) Class XII Max Marks: 70 Time: 3 hrs General Instructions: 1. This question paper contains two parts A and B. Each part is compulsory. 2. Both Part A and Part B have choices. 3. Part-A has 2 sections: a. Section – I is short answer questions, to be answered in one word or one line. b. Section – II has two case studies questions. Each case study has 4 case-based subparts. An examinee is to attempt any 4 out of the 5 subparts. 4. Part - B is Descriptive Paper. 5. Part- B has three sections a. Section-I is short answer questions of 2 marks each in which two questions have internal options. b. Section-II is long answer questions of 3 marks each in which two questions have internal options. c. Section-III is very long answer questions of 5 marks each in which one question has PART A Section - I Attempt any 15 questions from questions 1 to 21(1 mark each) 1. State whether True or False : i. E –waste is hazardous if not handled carefully. _________ ii. Free software is the same as freeware. ______________ 2. Fill in the blanks : The command used to display graph is ______________ a. plt.show() b.plt.plot() c.plt.xlabel() d.plt.title() 3. Write the output of the following SQL command. select round(123.58,1); a. 1​ 23.6 b. 1​ 24 c. 1​ 23.5 d. ​123

4. Given a Pandas series called Sequences, the command which will display the last 3 rows is . a. print(Sequences.tail(3)) b. print(Sequences.Tail(3)) c. print(Sequences.tails(3) d. print(Sequences.tail()) 5. Given the following Series S1: S1 A 10 B 20 C 30 D 40 Write the command to double the value in series and store in another series named as 2 6. Axes of a plot can be labelled using​ ​__________ and ____________ functions. 7. Web page constitutes the ​ _​ ________________ 8. Which method is used to access the vertical subset of a dataframe.? i. Iterrows() ii. Iteritems() iii. Itertuples() 9. Which of the following is not a network device : i. Repeater, hub, TCP, switch 10. Website is collection of . 11. The count() function in MySql is an example of . i. Math function ii. Text function iii. Date Function iv. Aggregate Function 12. Wi-Fi, infrared, and Bluetooth is an example network. 13. The command to install pandas is 14. I can share hardware I can share software I facilitate you Who am i? 15. Which amongst the following is not used to surf on the network? i. Internet explorer ii. Firefox iii. Avast iv. Edge 16. Tricking people through authentic –looking emails or websites is called__________ 17. Unsolicited commercial email is known as ____________ 18. The​ c​ ommand can be used to arrange data in some order in a table in SQL 19. Write the SQL command that will display the year from date ’2020-09-30’ 20. _____________ is an example of a network of networks . 21. Online personal account, personal website is an example of____________

Section -II Both the case study based questions (22 & 23 ) are compulsory. Attempt any four sub parts from each question. Each sub question carries 1 mark. 22. Consider the following Data Frame ​df ​and answer a​ ny four out of five from (​ i) to (v) Name Rollno English Hindi Maths Ssc Science 0 Anita 1 55 45 87 67 70 1 Sunita 2 67 65 90 87 56 2 Radha 3 78 76 98 90 78 3 Anis 4 98 87 78 45 87 4 Kaushal 5 45 58 90 69 98 a. Write statement to display name and rollno only. b. The teacher needs to know the marks scored by the student with roll number 4. Help her to identify the correct set of statement/s from the given options : a. df1=df[df[‘rollno’]==4] print(df1) b. df1=df[rollno==4] print(df1) c. df1=df[df.rollno=4] print(df1) d. df1=df[df.rollno==4] print(df1) c. Which of the following statement/s will delete column ‘Total’ from the dataframe? i.df.pop(‘Total’) ii. del df[‘Total’] iii.del (df.Total) iv.df.del(‘Total’) Choose the correct option: a. both (i) and (ii) b. only (ii)  c. (i), (ii) and (iii)  d. (i), (ii) and (iv) d. Which of the following command will display the column labels of the DataFrame? a. print(df.columns()) b. print(df.column()) c. (df.column) d. print(df.columns) e. Write command to add total column to dataframe named ‘total’ which stores the total of all the subjects mentioned in the df. 23. Consider the table TRAVEL given below: NO NAME TDATE KM CODE NOP 101 Janish Kin 2015–11–13 200 101 32 103 Vedika Sahai 2016–04–21 100 103 45 105 Tarun Ram 2016–03–23 350 102 42 102 John Fen 2016–02–13 90 102 40 107 Ahmed Khan 2015–01–10 75 104 2 104 Raveena 2016–05–28 80 105 4

i. Write query to give the output as: NO NAME TDATE KM 101 Janish 2015-11- 200 Kin 13 105 Tarun 2016-03- 350 Ram 23 (A) Select * from travel where km>200; (B) Select * from travel where km>=200; (C) Select no,name, tdate,km from travel where km>=200; (D) Select no,name, tdate,km from travel where km between 200 and 350; ii. Write a query to display the maximum km from the travel table. iii. Akhil has given the following command to arrange the data in ascending order of date . Select * from travel where order by date; but he is not getting the desired result. Help him by writing the correct command. a) Select * from travel where order by date; b) Select * from travel order by date; c) Select * from travel in ascending order; d) Select date from travel order by date; iv. Write the query to count the number of codes in each code type from the travel table.? i. select count(code) from travel ; ii select code,count(code) from travel group by code; iii. select code,count( distinct code) from travel; iv. select code,count( distinct code) from travel group by code; Choose the correct option: a. Both (ii) and (iii) b.Both (ii) and (iv)  c.Both (i) and (iii)  d.Only (ii)

v. Help Ritesh to write the command to display the name of the traveler whose travel date is in the year 2016? a. Select name,tdate from travel where year(tdate)=2016 ; b. Select name,tdate from travel where tdate=2016; c. Select name,tdate from travel where year(tdate)= =2016; d. Select name,max(tdate) from travel ; Part – B Section – I(2 marks each) 24. Consider a given Series , S1: 100 500 101 500 102 500 103 500 104 500 Write a program in Python Pandas to create the series. 25. State any two differences between where and having clause in SQL. Give example of each OR What is the difference between the order by and group by clause when used along with the select s​ tatement. Explain with an example. 26. How are NULL values treated by aggregate functions in SQL. Give Example 27. Consider the following Series object, s Apple 10 Mango 20 Banana 30 Orange 40 i.Write the command which will display only apples. ii.Write the command to increase the price of all fruits by 10. 28. Kaushal writes the following commands with respect to a table student having fields, name,roll no, marks and records of 5 students. Command1 : Select count(marks) from student; He gets the output as 4 for the command . Explain the output with justification. 29. Consider the following SQL string: “Informatics” a. Write commands to display “form” b. Display the string in capital letters. OR Considering the same string “Informatics” Write SQL commands to display: a) the position of the substring ‘matics’ in the string . b) the last 4 letters of the string

30. Consider the following Data Frame, class1 Name Roll no English Hindi Maths Ssc Science 0 Anita 1 55 45 87 67 70 1 Sunita 2 67 65 90 87 56 2 Radha 3 78 76 98 90 78 3 Anis 4 98 87 78 45 87 4 Kaushal 5 45 58 90 69 98 Write code to display the data frame ‘class1’ row-wise. 31. Expand the following terms related to Computer Networks: i. URL ii. ISP  iii. FTP  iv. HTTP 32. List any two health hazards related to excessive use of Technology. 33. Following acts are considered : ● Posting any kind of humiliating content about the victim. ● Hacking the victim’s account. ● Sending or posting vulgar messages online. ● Threatening to commit acts of violence. ● Stalking by means of calls, messages, etc. ● Threats of child pornography. What is the correct word for the above statements mentioned? What action an individual must take if the above mentioned things happened ? Section -II(3 marks each) 34. Consider two objects x and y. x is a list whereas y is a Series. Both have values 20, 40,90, 110. What will be the output of the following statement considering that the above objects have been created already a. print (x*y) This statement correct or not ? What will be the output. Give reason for your answer. 35. What do you mean by cyber security? How one can protect His/Her data. OR What do you understand by Net Etiquettes? Explain any two such etiquettes. 36. Consider the following graph . Write the code in python to draw a bar graph to show the percentage of following students.

OR Write code in python to show the data using histogram. 37. A relation product is given: V_no Type Company Price Qty AW125 Wagon Maruti 250000 25 J0083 Jeep Mahindra 4000000 15 S9090 SUV Mitsubishi 2500000 18 M0892 Mini Van Datsun 1500000 26 W9760 SUV Maruti 2500000 18 R2409 Mini Van Mahindra 350000 15 Write SQLcommands to: i. Display the MINIMUM price of each type of vehicle having quantity more than 20. ii. Display the Count of the type of vehicles manufactured by each company. iii. Display the type and total price((price*qty) of all the types of vehicles in ascending order of type.

Section -III(5 Marks each) 38. Write a program in Python Pandas to create the following DataFrame Bank from a Dictionary: C_NO Name Balance 101 Sunita 9000 102 Manish Sharma 6500 103 Ajay Goel 70000 104 Aditya Thakur 800000 Perform the following operations on the DataFrame : 1)Add a new column interest in dataframe (interest rate is 5%) 2)Display the customers having balances more than 50000. 39. Write the SQL functions which will perform the following operations: i. To display the day of the month of the current date . ii. To display the length of string , “ hello “. iii. To display the name of the day eg, Friday or Sunday from your date of birth, dob. iv. To display the string in upper case ‘I love india’ v. To compute the 2​3​ using sql function. OR Consider a table SALES with the following data: SNO SNAME SALARY BONUS DATE OF JOIN A01 Beena Mehta 30000 45.23 29-10-2019 A02 K. L. Sahay 50000 25.34 13-03-2018 B03 Nisha 30000 35.00 18-03-2017 Thakkar B04 Leela Yadav 80000 NULL 31-12-2018 C05 Gautam Gola 20000 NULL 23-01-1989 C06 Trapti Garg 70000 12.37 15-06-1987 D07 Neena 50000 27.89 18-03-1999 Sharma Write SQL queries using SQL functions to perform the following operations: i. Display salesman name and salary of salesman assuming the salary in the table is for one month and display the salary for the complete year. . ii. Display the first four characters of salesman names.

iii. Display the name of the salesman in upper case. iv. Display the year name for the date of join of salesman v. Display the name of the weekday for the date of join of salesman whose year is 2019 40. KVS organization is setting up the network between the different wings. There are 4 Wings named as Science(S), Junior(J), Admin(A) and Hostel(H). Distance between various wings in meters. A TO S 100 A TO J 200 A TO H 400 S TO J 300 S TO H 100 J TO H 450 Number of computers in each wing Senior 200 Admin 10 Junior 50 Hostel 20 i. Suggest a suitable Topology for networking the computer of all wings. ii. Name the wing where the server is to be installed. Justify your answer iii. Suggest the placement of Hub/Switch/Repeater in the network iv. Mention an economic technology to provide internet accessibility to all wings v. Suggest the type of Network LAN/MAN/WAN.

INFORMATICS PRACTICES (065) Class XII(IP) ANSWER KEY SECTION A 1. i. True ii.False 2. plt.show() 3. 123.6 4. print(Sequences.tail(3)) 5. S2=s1*2 6. xlabel and ylabel 7. website 8. Iteritems() 9. TCP 10. Web pages 11. Aggregate function 12. PAN or LAN both are correct 13. Pip install pandas 14. Server 15. Avast 16. Hacking 17. Spam 18. Order by 19. Select year( ’2020-09-30’ ) 20. Internet 21. Digital property 22. i. print(df[[\"Name\",\"Rollno\"]] ) ii. a) df1=df*df*‘rollno’+==4+ print(df1) d) df1=df[df.rollno==4] print(df1) iii. both (i) and (ii) iv. print(df.columns) v. df[\"Total\"]=df[\"English\"]+df[\"Hindi\"]+df[\"Maths\"]+df[\"Ssc\"]+df[\"Scie nce\"] 23. i. (c) and (d) both are correct ii. Select max(km) from travel; iii. B iv. only (ii) v. Select name,tdate from travel where year(tdate)=2016

SECTION B 24. import pandas as pd1 s =pd1.Series(500,index=[100,101,102,103,104]) print(s) 25. (i) Where clause is used in sql when ever any condition is to be used for example select * from std where rollno>10; (ii) Having is used only along with group (iii) Select * from std group by class having rollno>10; OR The order by clause is used to show the contents of a table/relation in a sorted manner with respect to the column mentioned after the order by clause. The contents of the column can be arranged in ascending or descending order. The group by clause is used to group rows in a given column and then apply an aggregate function eg max(), min() etc on the entire group. 26. null values are ignored in SQL if out of two rows 12, null one has null value the output of sum would be 12 same in case of any aggregate function 27. i. print(s['Apple']) ii. s=s+10 print(s) 28. This is because the column marks contains a NULL value and the aggregate functions do not take into account NULL values. Thus Command1 returns the total number of records in the table whereas Command2 returns the total number of non NULL values in the column marks 29. A. select substr(\"Informatics \", 3,4); B. select upper(“Informatics”) OR OR a. select instr (\"Informatics \", 'matics')); b. select right (\"Informatics \", 4); 30. for row_index,row in class1.iterrows(): print(row_index,row) 31. URL : Uniform Resource Locator a. ISP Internet Service Provider FTP File Transfer Protocol HTTP :Hyper Text Transfer Protocol 32. The continuous use of devices like smartphones, computer desktop, laptops, head phones etc cause a lot of health hazards if not addressed. These are: a. Impact on bones and joints: wrong posture or long hours of sitting in an uncomfortable position can cause muscle or bone injury.

b. Impact on hearing: using headphones or earphones for a prolonged time and on high volume can cause hearing problems and in severe cases hearing impairments c. Impact on eyes: This is the most common form of health hazard as prolonged hours of screen time can lead to extreme strain in the eyes. d. Sleep problem: Bright light from computer devices block a hormone called melatonin which helps us sleep. Thus we can experience sleep disorders leading to short sleep cycles. 33. We call this type of activity as cyber bullying It must be reported to cyber cell. 34. The statement is correct b.will give the output as: 0 10000 1 40000 2 90000 3 160000 dtype: int32 list is also like a series so they can be multiplied. 35. Cyber security is the combination of best processes and practices to ensure the security of networks, computers, programs, data and information from attack, damage or unauthorized access. OR Net Ettiquets refers to the proper manners and behaviour we need to exhibit while being online. These include : 1. No copyright violation: we should not use copyrighted materials without the permission of the creator or owner. We should give proper credit to owners/creators of open source content when using them. 2. Avoid cyber bullying: Avoid any insulting, degrading or intimidating online behaviour like repeated posting of rumours, giving threats online, posting the victim’s personal information, or comments aimed to publicly ridicule a victim. 36. import numpy as np import matplotlib.pyplot as plt year=[2014,2015,2016,2017,2018] jnvpasspercentage=[90,92,94,95,97] kvpasspercentage=[89,91,93,95,98] plt.plot(year,jnvpasspercentage) plt.plot(year,kvpasspercentage) plt.xlabel('Year') plt.ylabel('Passpercentage')

plt.title('JNVKVPASS%till2018') plt.legend() plt.show() OR import numpy as np import matplotlib.pyplot as plt plt.hist([1,11,21,31,41,51],bins=[0,10,20,30,40,50,60],weights=[10, 1,0,33,6,8]) plt.show() 37. a. select Type, avg(Price) from Vehicle group by Type having Qty>20; b. select Company, count(Type) from Vehicle group by Company; c. Select Type, Price*qty from Vehicle order by Type; 38. import pandas as pd d1={'C_NO':[1,2,3,4], 'Name':[\"Sunita\",\"Manish Sharma\",\"Ajay Goel\",\"Aditya Thakur\"], 'Balance':[9000,6500,70000,800000], } df=pd.DataFrame(d1) print(df) df['Interest'] = 0.05*df['Balance'] print(df[df['Balance']>50000]) 39. (i) Select dayofmonth(date(now())); (ii) Select len(“hello “) ; (iii) Select dayname(‘date of birth any’); (iv) Select upper (‘I love india’); (v) Select mod(n1,n2); OR a) Select sname, salary*12 from Sales; b) Select left(sname,4) from Sales; c) Select upper(sname) from Sales; d) Select year(DateofJoin) from Sales; e) Select weekday(DateofJoin) from Sales where year(dateofjoin)=2019; 40. i) Star tolology ii) Senior wing having maximum number of computers iii) Switch in every wing and repeater between the wings. (iv) Broadband (v) LAN

MODEL EXAMINATION 2020 – 21 CLASS – XII SUBJECT – Mathematics Time Allowed : 3 HOURS MM: 80 General Instructions: 1. This question paper contains two parts A and B. Each part is compulsory. Part A carries 24 marks and Part B carries 56 marks 2. Part-A has Objective Type Questions and Part -B has Descriptive Type Questions 3. Both Part A and Part B have choices. Part – A: 1. It consists of two sections- I and II. 2. Section I comprises of 16 very short answers type questions. 3. Section II contains 2 case studies. Each case study comprises of 5 case-based MCQs. An examinee is to attempt any 4 out of 5 MCQs. Part – B: 1. It consists of three sections- III, IV and V. 2. Section III comprises of 10 questions of 2 marks each. 3. Section IV comprises of 7 questions of 3 marks each. 4. Section V comprises of 3 questions of 5 marks each. 5. Internal choice is provided in 3 questions of Section –III, 2 questions of Section IV and 3 questions of Section-V. You have to attempt only one of the alternatives in all such questions. Part A SECTION- I All questions are compulsory. In case of Internal choices attempt any one. Question Nos. 1 to 16 are very short answer type. 1. Show that f:R R defined as f(x) = Sinx is neither one-one nor onto. OR If R is an equivalence relation defined in Set A= {1,2,3.....10} as R= {(a b):|a-b| is a multiple of 3} write the equivalence class {1} 2. The relation R in the set of natural numbers N defined as R={(x,y)€ NxN: x+y=5}. Is relation R a function?

3. Let f: R R be a function defined as f(x) =x2 + 3. Show that function is not surjective. OR How many relations are possible in Set A such that n(A)=2 ? 4. Find the order of matrix 2 0 ������ [−1 ] [ 2 ] 45 5. Let P and Q are two different matrices of order nX3 and nxp respectively. Then find the order of matrix QTp. 0 2������ −2 6. Matrix A= [ 3 1 3 ] is given to be symmetric, find values of a and b. 3������ 3 −1 7. Evaluate OR If ∫0������ 1 . ������������ = ������ then find the value of ‘a’ . 1+4������2 8 8. Find the area bounded by the line y=2x, the y-axis and the line y=3. ������2 ������ 1 ������������2 (������������)2}4 9. Find the order and degree of the differential equation = {������ + ������������ OR What is the integrating factor of ������ ������������ − ������ = ������4 − 3������ ������������ 10. Evaluate 2������̂ Χ (������̂ Χ ���̂���) + ������.̂ (������̂ Χ ���̂���) − ���̂���. (������̂ Χ ������̂) 11. Evaluate |2���⃗��� Χ ⃗a| , if it is given that ������ = 2 ������̂ -������̂ + 3 ���̂��� and ���⃗��� = 3������̂ + ���̂��� 12. Find the y- intercept cut by the plane 4x-3y+2z-9 = 0 13. Find the distance between parallel planes ������ .(2������̂ - ������̂ + 3 ���̂��� ) = 4 and ������ .(6������̂ -3 ������̂ + 9 ���̂��� )+13 = 0 14. Write the vector equation of the following line: ������−5 = ������+4 =6−������ 3 72 15. Three dice are thrown at the same time, find the probability of getting three two’s if it is known that sum of the numbers on three dice is six. 11 16. Probability of solving specific problem independently by A and B are 2 and 3 respectively. If both try to solve the problem independently, find the probability that the problem is solved.

SECTION – II Both the case study based questions are compulsory. Attempt any 4 sub parts from each question. Each sub-part carries 1 mark. 17. These days competitive examinations are online, a student has to go to a particular place to give examination at a given time. For this company has to make perfect arrangements and students are expected to be well prepared. But as a human nature sometimes a student guesses or copies or knows the answer to MCQ with four choices each. With the given background answer the following. 1 i. If the possibility that a student makes a guess is 3 and that he copies the 1 answer is 6 . What is the probability that he knows the answer. 15 d. 1 a. 1 b. 2 c. 6 3 ii. If answer is correct, what is the probability that he guesses it? 1 1 1 d. 1 a. 4 b. 2 c. 8 3 iii. What is the conditional probability that his answer is correct and he knew it? 1 d. 1 a. 2 b.0 c. 1 4 iv. What is the probability of answering a question correctly assuming the probability 1 that he copied it is 8 ? 11 1 29 d. 5 a. 8 b. 5 c. 48 29 v. What is the probability that he copied it given his answer is correct? 24 1 4 d. 6 a. 29 b. 29 c. 29 29 18. The government of a state which has mostly hilly area decided to have adventurous playground on the top of hill having plane area and space for 10000 persons to sit at a time. After survey it was decided to have rectangular playground with a semicircular parking at one end of playground only as space is less. The total perimeter of the field is measured as 1000m as shown.

Based on the above information answer the following. i. Looking at the figure(plan) the relation between x and y is a. X+2y+πy= 100 c. 2X+2y+πy= 1000 b. X+2y+πy= 500 d. X+y+πy= 1000 ii. Area of sports ground in terms of x is a. 2 (1000x-2x2)m2 c. 2 (500x-2x2)m2 ������+2 ������+2 b. 1 (1000x-2x2)m2 d. 1 (500x-2x2)m2 ������ ������ iii. The maximum area of sports ground is for x equal to a. 500 m c. 100 m b. 50 m d. 250m iv. The government wants to maximise the area including parking area for this to happen, value of y is a. 1000 m c. 500 m 4+������ 4+������ b. 2000 m d. 750 m 4+������ 4+������ v. What is the maximum area of the sports field alone? a. 9000 m2 c. 25000 m2 2+������ 2+������ b. 16000 m2 d. 100000 m2 2+������ 2+������ PART B SECTION-III All questions are compulsory. In case of internal choices attempt any one. 19. Find the value of cos(1 cos-1 1 ). 28 20. If matrix A= [−11 −11] and A2 =kA, then find the value of k OR Find the matrix X so tat X[41 2 63] = [−27 −8 −69] 5 4 {21. Find the value of k so that the function f defined by f(x)=������������ + 1, ������������ ������ ≤ ������ is continuous at ������������������������, ������������������ > ������ x=������ 22. Find the equation of the tangent to the curve ������2⁄3 + ������2⁄3 =1 at (1,1).

23. Evaluate ∫ sin2 x . ������������ ������������������4 ������ OR ∫−11⁄⁄22 ������������ (1−������2)1⁄2 24. Find the area (in square units) enclosed by the curve ������2y =36, the x –axis and the lines x=6 and x=9. 25. Solve: xy dy =(y+5)dx, given that y(5)=0. 26. If |������| = 10, |���⃗���| = 2, and ������ . ���⃗��� = 12, then find the value of |������ Χ ���⃗���| 27. Find the vector equation of the line passing through the point A(1,2,-1) and parallel to the line 5x-25=14-7y=35z. 28. A random variable x has the following probability distribution. x0123456 7 p(x) 0 k 2k 2k 3k k2 2k2 7k2+k Determine k. OR If p (A) = 3⁄5 and p(B) = 1⁄5, find p(A ∩ B) if A and B are independent events. SECTION IV Question number 29 to 35 carry 3 marks each. 29. Show that the relation R in the set of real numbers defined as R={(a, b):a≤ b2 } is neither reflective nor symmetric nor transitive. 30. Find������������⁄������������ of ������������=������������ 31. If x=a sin3t, y= a cos3t, then find (������������������������)������=34������ OR If y=(tan−1 ������)2, Show that (������2 + 1)2 ������2 +2x(������2 + 1)������1= 2 32. Find the interval(s) in which the function f(x)=x3 + ������13, x≠0 is i. Strictly increasing ii. Strictly decreasing. 33. Find ∫ 3������−1 .dx (������−1)(������−2)(������−3) 34. Find the area of the region bounded by y=√������ and y=x. OR Find the area of the region bounded by the curve y2=4x and x2=4y.

35. Solve: (1 + ������2) ������������ + 2������������ = 4������2 ������������ SECTION V Question number 36 to 38 carry 5 marks each. 1 −1 0 2 2 −4 36. Given A=[2 3 4] and B=[−4 2 −4] verify that BA=6I, how we can use the result to find 0 12 2 −1 5 the values of x,y,z from given equations. X-y=3, 2x+3y+4z= 17, y+2z=17 OR 31 2 If A=[3 2 −3] find A-1. Hence solve the system of equations. 2 0 −1 3x+3y+2z=1 X+2y=4 2x-3y-z=5 37. Find the shortest distance between the lines. ������ = (1 + ������)������̂ + (2 − ������)������̂ +(������ + 1)���̂��� ; ������ = (2������̂ − ������̂ − ���̂���) + µ (2 ������̂ + ������̂ + 2���̂���) OR Find the distance of the point (2,12,5) from the point of intersection of the line ������ =2������̂ − 4������̂ − 2���̂��� +������ (3 ������̂ + 4������̂ + 2���̂���) and the plane ������.(������̂ − 2������̂ − ���̂��� ) =0. 38. Solve the following linear programming problem graphically. Maximise z=20x+40y Subject to constraints 1.5+3y≤42 X+2y ≤ 28 and 3x+2y ≤ 24, x≥ 0, y≥ 0. OR Evaluate ∫0������⁄4 ������������������(1 + ������������������������)������������.





















Model Question Paper 2020-21 Class XII Biology Time - 3 Hours Maximum marks -70 General Instructions: (i) All questions are compulsory. (ii) The question paper has four sections: Section A, Section B, Section C and Section D. There are 33 questions in the question paper. (iii) Section–A has 14 questions of 1 mark each and 02 case-based questions. Section–B has 9 questions of 2 marks each. Section–C has 5 questions of 3 marks each and Section–D has 3 questions of 5 marks each. (iv) There is no overall choice. However, internal choices have been provided in some questions. A student has to attempt only one of the alternatives in such questions. (v) Wherever necessary, neat and properly labeled diagrams should be drawn. SECTION A Questions Marks 1 Double fertilization is the characteristic feature of angiosperms. One of the 1 events is triple fusion.Name the other event. 2 Name the phenomenon in which plants produce seedless fruits without 1 fertilization . 3 Why are pollen grains preserved as fossils ? 1 4 The presence of HCG in urine is the indication of pregnancy. Which is the 1 source of HCG ? 5 In man, four types of blood groups are determined by three alleles of a gene. 1 Name the type of inheritance involved in blood groups . 6 Define a test cross. 1

7 Why DNA is considered as a better genetic material than RNA ? 1 8 Name the two genes that are present in Bt toxins that control cotton bollworms. 1 9 Name the pathogen from which T​1​ plasmid is taken to modify as cloning 1 vectors. 10 Define Allen’s rule. 1 11 Assertion​ : The whole chromatin is not functional.  1 Reason​ : Heterochromatin does not take part in transcription.  a . Both Assertion and Reason are true and Reason is the correct explanation of Assertion. b. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion. c. Assertion is true but Reason is false. d . Assertion is false but Reason is true. e. Both Assertion and Reason are false. 12 Assertion​ : DNA ligase plays an important role in rDNA technology  1 ​Reason​ : DNA ligase acts as molecular scissors    a . Both Assertion and Reason are true and Reason is the correct explanation of Assertion. b. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion. c. Assertion is true but Reason is false. d . Assertion is false but Reason is true. e. Both Assertion and Reason are false. 13 Assertion​ :​Sacred groves are examples of Ex-situ conservation.  1 Reason​ : In Meghalaya ,the sacred groves are the last refuges for a large  number of rare and threatened plants .   a . Both Assertion and Reason are true and Reason is the correct explanation of Assertion. b. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion. c. Assertion is true but Reason is false. d . Assertion is false but Reason is true. e. Both Assertion and Reason are false.

14 Assertion​ :Interspecific interaction arises from the interaction of  1 populations of two different species .  ​Reason​ : Ammensalism is a type of interspecific interaction in which both  the species are harmed .  a . Both Assertion and Reason are true and Reason is the correct explanation of Assertion. b. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion. c. Assertion is true but Reason is false. d . Assertion is false but Reason is true. e. Both Assertion and Reason are false. 15 Read the following and answer the four questions from 15(i) to 15(iv) given 4 below: HIV causes AIDS and interferes with the body's ability to fight infections. The virus can be transmitted through contact with infected blood, semen or vaginal fluids. Within a few weeks of HIV infection, flu-like symptoms such as fever, sore throat and fatigue can occur. Then the disease is usually asymptomatic until it progresses to AIDS. AIDS symptoms include weight loss, fever or night sweats, fatigue and recurrent infections. No cure exists for AIDS, but strict adherence to antiretroviral regimens (ARVs) can dramatically slow the disease's progress as well as prevent secondary infections and complications. i HIV parasitizes ____  a. Y-helper cells b. T-helper cells c. K-helper cells d. None of the above