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ISC Class XII Board Specimen 2013 : Computer Science Paper 1 (Theory)

9 pages, 41 questions, 35 questions with responses, 60 total responses,    0    0
ISC 12th
Indian School Certificate Examination (ISC), New Delhi
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COMPUTER SCIE CE PAPER 1 (THEORY) Three hours (Candidates are allowed additional 15 minutes for only reading the paper. They must OT start writing during this time.) ---------------------------------------------------------------------------------------------------------------Answer all questions in Part I (compulsory) and seven questions from Part-II, choosing three 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 Answer all questions. While answering questions in this Part, indicate briefly your working and reasoning, wherever required. Question 1 (a) State the two distributive laws of Boolean Algebra. Prove any one of them with [2] the help of Truth Table. (b) Draw the truth table to verify the expression : [2] p q is equivalent to q p ( q = q = q ) (c) Find the complement of the following: [2] [(xy) x] [ (xy) y] (d) Simplify the following Boolean Expression using laws of Boolean Algebra. At [2] each step, clearly state the law used for simplification. z.(z+x)x(y+ y) (e) Given F ( x, y, z ) = xz + xy + yz Write the function in canonical sum of products form. [2] 1 ISC Specimen Question Paper 2013

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