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ICSE Prelims 2016 : Computer Applications (R. B. K. School (RBK), Mira Road)

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SECOND PRELIM EXAMINATION 2015-16 Std: X Date: 08 /01/2016 Subject: Computer Application Marks:100 Dur. : 2Hrs SECTION A Question 1 a b c d e f g What is a keyword ? Give two examples. Differentiate between class and object. Write any four features of java language . Define JVM . What is the purpose of dot operator. Name any two wrapper classes. What is subscripted variable ? 2 2 2 1 1 1 1 Question 2 a b c d e Name the data type : i) whose default value is 0.0 and memory storage capacity is 64 bits. ii) of an object . Differentiate between bubble sort and selection sort. Explain empty loop with an example. Write java statement for the following. i) extract second last character from String s1. ii) initialize character array to store vowels. Explain function overloading with an example. 2 2 2 2 2 Question 3 a b c d e Write the value of x after execution . int x = 4 ; x - = (x - -) - (++x) + x++ + x Write the output for the following : String s1 = transformation ; System.out.println(s1.substring(5) ) ; System.out.println (s1.charAt(7) ); System.out.println( ans .equals(s1.substring(2,5) ) ); System.out.println( s1.indexOf( o ) ); Solve the following code. int num1=1 ,num2=4; for(int x = 1 ; x <=3 ; x + =1 ); ++num1; - -num2; System.out.println( num1+ +num2); 2 Rewrite using do while loop int sum = 0; for( int a=5 , b =0 ; a < = 10 ;a++ ,b++) { sum =a +b; System.out.println(sum); } What is the value of x and ch1 ? Page 1 of 3 2 4 2 2

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