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CBSE Class 12 Pre Board 2021 : Computer Science (Kendriya Vidyalaya (KV), Lucknow Region)

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KENDRIYA VIDYALAYA SANGATHAN, LUCKNOW REGION II Pre-Board Examination C l a s s X I I : Computer Science (083) Session: 2020-21 Maximum Marks: 70 Time Allowed: 3 hours 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. Section II has two case studies questions. Each case study has 4 casebased sub-parts. 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 internal option. 6. All programming questions are to be answered using Python Language only b. Question Number 1 2 3 4 5 PART A SECTION - I Select the most appropriate option out of the options given for each question. Attempt any 15 questions from question no 1 to 21. Which of the followings are valid variable names in Python? (i) Emp-Code (ii) FOR (iii) Emp_Code (iv) 2020SalesDetail Given the List L = [5,7,8,11,45,80] , Write the output of print(L[::-1]) Marks Allotted Which of the following statement is True in context to a mode in CSV File Handling operations in Python? (i) It allows to write data only in existing file (ii) It allows to write data in file, if file not exists it will create new file if exists it will overwrite the previous content. (iii) It allows to write data in file, if file not exists it will create new file, if exists it will add new data at the end of previous content. (iv) It allows performing both read and writing operation on file. What will be result of following arithmetic expression? 50 + 20 % 50 (i) 50 (ii) 70 (iii) 100 (iv) 80 Suppose a tuple T is declared as T = (20,21,45,67), which of the following is valid to add new item 100 in tuple? (i) T = T + 100 (ii) T = T + (100) (iii) T = T + (100,) (iv) T.append(100) 1 1 1 1 1 1

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