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Class 12 ISC Prelims 2018 : Computer Science (St. Paul's School, Rourkela)

7 pages, 32 questions, 21 questions with responses, 27 total responses,    1    0
Amit Dhar
St. Paul's School, Rourkela
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ASSOCIATION OF ODISHA-CHHATTISGARH ICSE SCHOOLS MODEL EXAMINATION-2017 COMPUTER SCIENCE PAPER I(THEORY) ( Three Hours ) Maximum Marks: 70 (Candidates are allowed additional 15 minutes for only reading the paper. They must NOT start writing during this time) ----------------------------------------------------------------------------------------------------------------Answer all questions in Part I (compulsory) and six questions from Part-II, choosing two questions from Section-A, two from Section-B and two from Section-C. All working, including rough work, should be done on the same sheet as the rest of the answer. the intended marks for questions or parts of questions are give in brackets []. -------------------------------------------------------------------------------------------------------------------------------------PART I Answer all questions While answering questions in this Part, indicate briefly your working and reasoning, wherever required Question 1. a) Write the converse and inverse of A B. [1 b) Using truth table show that (A+B) + (A .B) = A [1 c) With an example explain the term redundant group in K-map. [1 d) Convert the expression (X Y) .(Y Z ) to its canonical SOP form. [1 e) Name the logic gate for the following circuit diagram and write its truth table. [1 Question 2. a) Convert ABC*DE/F^+H*+ to infix notation. [2 b) A two dimensional array X[4 7, LC 3] requires 2 bytes of storage space for each element. Base address is 100 and the address of X[6,2]

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