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ISC Class XII Board Exam 2008 : Computer Science

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ISC 2008 COMPUTER SCIENCE PAPER 1 THEORY PART I Answer all questions in this part Question 1. a) State the two complement properties of Boolean Algebra. Verify any one of them using the truth table. b) Simplify the following Boolean expression stating clearly the laws used for simplification at each step. XY + XZ + XYZ c) Find the complement of: X.(Y Z + YZ) d) Convert the following Product of Sum form into its corresponding Sum of Product form:F(X,Y,Z)= (2,4,6,7) e) Draw the truth table of the propositional logic expressions p q and p q. [ 2 x 5 = 10] Question 2. a) Mention two points which distinguish a static data member from an ordinary data member in a class. b) Convert the following infix expression to its postfix form:A / (B+C) +D * (E-F) c) What do LIFO and FIFO stand for? Name a data structure that follows LIFO principle and one that follows FIFO principle. d) A two dimensional array defined as x[3 6, -2 2] requires 2 bytes of storage space for each element. If the array is stored in row major order, determine the address of X[5,1], given the base address as 1200. e) List the nodes in the tree given below in : i) Preorder ii) Postorder [ 2 x 5 = 10] 1 www.javaforschool.com

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