#1
15th November 2014, 04:29 PM
 
 
Question Paper of ISC Computer Science
I want to get the question paper of ISC Computer Science, will you please provide me that ?

#2
17th November 2014, 09:35 AM
 
 
Re: Question Paper of ISC Computer Science
As you want to get the question paper of ISC Computer Science, so here I am giving you some questions of that paper: ISC Computer Science Paper 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 the help of Truth Table. [2] (b) Draw the truth table to verify the expression : p q is equivalent to q p (q = q = q’) [2] (c) Find the complement of the following: [(xy)0 • x] [ (xy)0 • y] [2] (d) Simplify the following Boolean Expression using laws of Boolean Algebra. At each step, clearly state the law used for simplification. z . ( z + x ) x ( y + y ) [2] (e) Given F ( x, y, z ) = xz + xy + yz Write the function in canonical sum of products form. [2] Question 2 (a) What do LIFO and FIFO stand for? [2] (b) For an array of real numbers x [ − 6… 8 , 12… 20 ] , find the address of x [5] [4 ], if x [1] [1] is stored in location 100 in the column major order. Assume that each element requires 4 bytes. [2] (c) State the difference between an abstract class and an interface [2] (d) Convert the following infix expression to its postfix form: b * [ (a / d )  ( c * ( e  f ) ) ] [2] (e) Define a binary tree. [2] Question 3 (a) The following function is a part of some class. It returns the value 1 when the number is an Armstrong number, otherwise it returns 0. /* An Armstrong number is a number which is equal to the sum of the cube of its individual digits */ int arms ( int n ) { int digit = 0, sum = 0 ; int rem = n; while ( ? 1 ? ) { digit = ? 2 ?; sum = sum + ? 3 ? ; rem = ? 4 ? ; } if (? 5 ? ) return 1 ; else return 0 ; } (i) What is the expression/value at ? 1 ? [1] (ii) What is the expression/value at ? 2 ? [1] (iii) What is the expression/value at ? 3 ? [1] (iv) What is the expression/value at ? 4 ? [1] (v) What is the expression/value at ? 5 ? [1] (b) Give output of the following function where x and y are arguments greater than 0. Show the dry run/working. int strange (int x, int y) { //Assuming x>0 and y>0 if(x>=y) { x = xy; return strange(x , y); } else return x; } (i) What will the function strange(20,5) return ? [2] (ii) What will the function strange(15,6) return ? [2] (iii) In one line, state what the function is doing. [1] PART – II Answer seven questions in this part, choosing three questions from Section A, two from Section B and two from Section C. SECTIO_  A Answer any three questions. Question 4 (a) Given the Boolean function: F ( P, Q, R, S ) = ( 0, 1, 3, 4, 5, 6, 7, 9, 10, 11, 13, 15 ) Use Karnaugh’s map to reduce the function F, using the SOP form. Draw a logic gate diagram for the reduced SOP form. You may use gates with more than two inputs. Assume that the variable and their complements are available as inputs. [5] (b) Given the Boolean function : X ( P, Q, R, S ) = ( 3, 8, 10, 12, 13, 14, 15 ) Use Karnaugh’s map to reduce this function X using the given POS form. Draw a logic gate diagram for the reduced POS form. You may use gates with more than two inputs. Assume that the variables and their complements are available as inputs. [5] Question 5 The main safe in the nationalized bank can be opened by means of a unique password consisting of three parts. Different parts of the password are held by the Chairman, Regional Manager, Bank Manager and Head cashier of the bank, respectively. In order to open the safe, any one of the following conditions must be satisfied: The password of the Chairman, together with passwords of any two other officials, must be entered. OR The password of all the three bank officials, excluding the chairman, must be entered. The inputs are: A : Denotes the Chairman’s password. B : Denotes the Regional Manager’s password. C : Denotes the Bank Manager’s password. D : Denotes the Head Casher’s password. Output: X – Denotes that the safe can be opened. [1 indicates Yes and 0 indicates No in all cases] (a) Draw the truth table for the inputs and outputs given above and write the SOP expression for X( A, B, C, D ). [5] (b) Reduce X( A, B, C, D ) using Karnaugh’s map, if possible. Draw the logic gate diagram for the reduced SOP expression for X( A, B, C, D ) using AND & OR gates. You may use gates with two or more inputs. Assume that the variables and their complements are available as inputs. [5] Question 6 (a) Draw the truth table and logic circuit diagram for a Decimal to Binary Encoder. [5] (b) Given : F(x, y, z) = (1,3,7) Verify : F(x, y, z) = (0,2,4,5,6) [2] (c) Simplify the following expression by using Boolean laws. Show the working and also mention the laws used : X’Y’Z’ + XYZ’ + XY’Z’ + X’YZ’ [3] Question 7 (a) Define Cardinal Form of an expression and Canonical Form of an expression. Give an example for each. [3] (b) Which gate is equivalent to : (NOR) OR (XOR) [3] (c) Define a Half Adder. Draw the Truth Table and Logic diagram of a Half Adder. [4] SECTIO_ – B Answer any two questions. Each program should be written in such a way that it clearly depicts the logic of the problem. This can be achieved by using mnemonic names and comments in the program. (Flowcharts and Algorithms are not required.) The programs must be written in Java. Question 8 A perfect square is an integer which is the square of another integer. For example, 4, 9, 16 .. are perfect squares. Design a Class Perfect with the following description: [10] Class name : Perfect Data members/instance variables n : stores an integer number Member functions: Perfect( ) : default constructor Perfect(int) : parameterized constructor to assign a value to ‘n’ void perfect_sq() : to display the first 5 perfect squares larger than ‘n’ (if n = 15, the next 3 perfect squares are 16, 25, 36) void sum_of() : to display all combinations of consecutive integers whose sum is equal to n. ( the number n = 15 can be expressed as 1 2 3 4 5 4 5 6 7 8 Specify the class Perfect giving details of the constructors, void perfect_sq( ) and void sum_of(). Also define the main function to create an object and call methods accordingly to enable the task. Question 9 A class RecFact defines a recursive function to find the factorial of a number. The details of the class are given below: [10] Class name : RecFact Data members/instance variables n : stores the number whose factorial is required. r : stores an integer Member functions RecFact( ) : default constructor void readnum( ) : to enter values for ‘n’ and ‘r’ int factorial(int) : returns the factorial of the number using the Recursive Technique. Void factseries( ) : to calculate and display the value of ! !*( )! n r n r − Specify the class RecFact giving the details of the constructor and member functions void readnum( ), int factorial(int) and void factseries( ). Also define the main function to create an object and call methods accordingly to enable the task. Question 10 In “Piglatin” a word such as KING is replaced by INGKAY , while TROUBLE becomes OUBLETRAY and so on . The first vowel of the original word becomes the start of the translation, any preceding letters being shifted towards the end and followed by AY. Words that begin with a vowel or which do not contain any vowel are left unchanged. Design a class Piglatin using the description of the data members and member functions given below: [10] Class name : Piglatin Data members /instance variables : Txt : to store a word len : to store the length Member functions : Piglatin( ) : constructor to initialize the data mrmbers void readstring( ) : to accept the word input in UPPER CASE void convert ( ) : converts the word into its piglatin form and displays the word (changed or unchanged) void consonant( ) : counts and displays the number of consonants present in the given word. Specify the class Piglatin giving the details of the constructor, void readstring( ), void convert( ) and void consonant( ). Also define the main function to create an object and call methods accordingly to enable the task. SECTIO_ – C Answer any two questions. Each program should be written in such a way that it clearly depicts the logic of the problem stepwise. This can be achieved by using comments in the program and mnemonic names or pseudo codes for algorithms. The programs must be written in Java and the algorithms must be written in general / standard form, wherever required / specified. (Flowcharts are not required.) Question 11 A class Author contains details of the author and another class Book List contains details of the books written by him. The details of the two classes are given below: [10] Class name : Author Data members authorno : stores the author’s number name : stores the author’s name Member functions Author ( ) : default constructor Author ( … ) : parameterised constructor to assign values to author number and name void show( ) : to display the author’s details Class name : Booklist Data members/instance variables bookno : Long type variable to the store book number bookname : stores the book name price : float variable to store the price edition : integer type variable to store the edition number Member functions Booklist (…) : parameterized constructor to assign values to data members of both the classes void show( ) : to display all the details Specify the class Author giving details of the constructors and member function void show( ). Using the concept of Inheritance, specify the class Booklist giving details of the constructor and the member function void show( ). Also define the main function to create an object and call methods accordingly to enable the task. Question 12 In a computer game, a vertical column and a pile of rings are displayed. The objective of the game is to pile up rings on the column till it is full. It can hold 10 rings at the most. Once the column is full, the rings have to be removed from the top till the column is empty and then the game is over. Define the class RingGame with the following details: [10] Class name : RingGame Data members/instance variables ring [ ] : array to hold rings (integer) max : integer to hold maximum capacity of ring array upper : integer to point to the upper most element Member functions RingGame(int m) : constructor to initialize, max = m & upper to – 1. void jumpin(int ) : adds a ring to the top of the column, if possible. otherwise, displays a message “Column full. Start removing rings”. void jumpout( ) : removes the ring from the top, if column is not empty. otherwise, outputs a message, “Congratulations. The game is Over”. Specify the class RingGame giving the details of the constructor and functions void jumpin(int) and void jumpout( ). Also define the main function to create an object and call methods accordingly to enable the task. Question 13 (a) A Linked List is formed from the objects of the class, Class Node { int num; Node next; } Write the algorithm OR a method for inserting a node in the end of the list. The method declaration is given below : void insertnode(_ode start) [4] (b) State the complexity for the following algorithms : [3] (i) Linear Search (ii) Binary Search (iii) Selection Sort (c) List the nodes in the tree given below using: [3] (i) Preorder Traversal (ii) Postorder Traversal (iii) Inorder traversal I 
#3
5th March 2016, 11:21 AM
 
 
Re: Question Paper of ISC Computer Science
Sir I am looking for the question paper of ISC Computer Science so can you please provide me the same

#4
5th March 2016, 12:32 PM
 
 
Re: Question Paper of ISC Computer Science
Hey buddy below I am giving you the question paper of ISC Computer Science Question 1 (a) State Associative law and prove it with the help of a truth table. [1] (b) Draw the truth table to prove the proportional logic expression. (x => y) ʌ (y => x) = x <=> y [1] (c) Find the dual for the Boolean equation: AB’ + BC’ + 1 = 1. [1] (d) Convert the Boolean expression F(X,Y,Z) = X’Y’Z + X’YZ’ + XYZ into its cardinal form. [1] (e) Minimize F = XY + (XZ)’ +XY’Z using Boolean laws. [1] Question 2 (a) Differentiate between Stack data structure and Queue data structure. [2] (b) Convert the following infix notation to postfix: A * ( B / C ) / E + F [2] (c) Define Interface. How is it different from a Class? [2] ISC SPECIMEN QUESTION PAPER 2016 (d) Each element of an array arr[15][20] requires ‘W’ bytes of storage. If the address of arr[6][8] is 4440 and the Base Address at arr[1][1] is 4000 , find the width ‘W’ of each cell in the array arr[ ][ ] when the array is stored as Column Major Wise. [2] (e) Define Big ‘O’ notation. State the two factors which determine the complexity of an algorithm. [2] Question 3 The following is a function of some class. What will be the output of the function test ( ) when the value of count is equal to 4 ? Show the dry run / working. [5] void test (int count ) { if ( count = = 0) System.out.println(“ ” ); else { System.out.println( “Bye” + count); test( count ); System.out.println(“ ” + count); } }  ISC SPECIMEN QUESTION PAPER 2016 PART – II Answer six questions in this part, choosing two questions from Section A, two from Section B and two from Section C. SECTION  A Answer any two questions. Question 4 (a) Given F(A,B,C,D) = ( 0, 2, 3, 6, 8, 10, 11, 14, 15 ) (i) Reduce the above expression by using 4variable Karnaugh map, showing the various groups (i.e. octal, quads and pairs). [4] [4] (ii) Draw the logic gate diagram for the reduced expression. Assume that the variables and their complements are available as inputs. [1] (b) Given F(P,Q,R,S) = π ( 5, 7, 8, 10, 12, 14, 15 ) (i) Reduce the above expression by using 4variable Karnaugh map, showing the various groups (i.e. octal, quads and pairs). [4] (ii) Draw the logic gate diagram for the reduced expression. Assume that the variables and their complements are available as inputs. [1] Question 5 (a) Draw the logic diagram and truth table to encode the decimal numbers ( 2, 3, 5, 7, 8 ) and briefly explain its working. [5] (b) Simplify the following Boolean expression and draw the gate for the reduced expression. F= A’B + AB’C + A [2] (c) Define Universal gates. Give one example and show how it works as an OR gate. [3] Question 6 (a) Draw a truth table with a 3 input combination which outputs 1 if there are odd number [5] of 0’s. Also derive an SOP expression for the output. Reduce the expression using Karnaugh Map. (b) Define Proposition. How does tautology differ from contradiction? [2] (c) Briefly explain the working of a 4:1 multiplexer. Also draw the logic diagram of 4:1 multiplexer. Question Paper of ISC Computer Science 