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# CBSE Class 12 Pre Board 2021 : Computer Science - Set 2 (CBSE Gulf Sahodaya Qatar Chapter, Doha)

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PRE-BOARD EXAMINATION-2020-21 SUBJECT - COMPUTER SCIENCE Class: XII (CBSE) Date . Total Marks: 80 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 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 question internal options have. 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 Question No. Marks 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. 1. 2. 3. 4. 5. Find the invalid identifier from the following a) else b) 4rth_class c) _sum_of_nos 1 d) simple_intrest Given the lists L=[20,31,64,12,50,17,21,82] , write the output of print(L[3:6]) What is a CSV file? 1 1 Identify the valid arithmetic operator in Python from the following. a) or b) >= c) ? d) ** Suppose a tuple T is declared as T = (45, 56, 24, 78), which of the following is 1 1 incorrect? a) print(T[2]) Page 1 of 10

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