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ISC Class XII Board Exam 2018 : Computer Science

9 pages, 39 questions, 0 questions with responses, 0 total responses,

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COMPUTER SCIENCE PAPER 1 (THEORY) (Maximum Marks: 70) (Time allowed: Three hours) (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 given in brackets [ ]. --------------------------------------------------------------------------------------------------------------------PART I (20 Marks) Answer all questions. While answering questions in this Part, indicate briefly your working and reasoning, wherever required. Question 1 (a) State the Commutative law and prove it with the help of a truth table. [1] (b) Convert the following expression into its canonical POS form: [1] F(X, Y, Z) = (X+Y ) (Y +Z) (c) Find the dual of: [1] (A +B) (1+B ) = A +B (d) Verify the following proposition with the help of a truth table: [1] ( P Q ) ( P ~Q ) = P (e) If F(A, B, C) = A (BC + B C), then find F [1] Question 2 (a) What are Wrapper classes? Give any two examples. [2] (b) A matrix A[m][m] is stored in the memory with each element requiring 4 bytes of storage. If the base address at A[1][1] is 1500 and the address of A[4][5] is 1608, determine the order of the matrix when it is stored in Column Major Wise. [2] --------------------------------------------------------------------------------------------------------------------This Paper consists of 9 printed pages and 1 blank page. 1218-868A Turn over Copyright reserved.

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