CSE Computer Application - Class X - 2011 PYQ

Name the keyword that:

(i) Informs that an error has occurred in an input/output operation.
(ii) Distinguishes between instance variables and class variables.

Write a statement each to perform the following tasks on a string:

(i) Find and display the position of the last space in a string s.
(ii) Convert a number stored in a string variable x to double data type.

Write an expression in Java for:
z = (5x^3 + 2y)/(x + y)

(i)

int k = 5, j = 9;

k += k - j + k;

System.out.println("k = " + k);
System.out.println("j = " + j);

(ii)

double b = -15 * 6;
double a = Math.rint(Math.abs(b));

System.out.println("a = " + a);

int p = 200;

while(true)
{
    if(p < 100)
        break;
    p = p - 20;
}

System.out.println(p);

What is the role of the keyword void in declaring functions?

Write the output of the following:
(i) System.out.println(Character.isUpperCase('R'));
(ii) System.out.println(Character.toUpperCase('j'));

String n = "Computer Knowledge.";  
String m = "Computer Applications";  
System.out.println(n.substring(0, 8).concat(m.substring(9)));  
System.out.println(n.endsWith("e"));