Java set3

Which is the superclass of Error class in Java?

• Throwable

• Exception

• Runtine Exception

• None of the above

int arr[] = {1, 2, 3, 4, 5};

for ( int i = 0; i < arr.length - 2; ++i)

System.out.println(arr[i] + " ");

• 1 2 3 4 5

• 1 2 3 4

• 1 2

• 1 2 3

String c = "Hello i love java";

boolean var; var = c.startsWith("hello");

System.out.println(var);

• 0

• 1

• true

• false

double x = 2.0;

double y = 3.0;

double z = Math.pow( x, y );

System.out.print(z);

• 9.0

• 8.0

• 2.0

• 4.0

ArrayLists obj = new ArrayLists();

obj.add("A");

obj.add("B");

obj.add("C");

obj.add(1, "D");

System.out.println(obj);

• [A, D, C]

• [A, B, c]

• [A, B, C, D]

• [A, D, B, C]

Evaluate the following Java expression

int x=3, y=5, and z=10;

int a = ++z + y - y + z + x++;

System.out.println(a);

• 24

• 23

• 20

• 25

Which of the following for loop declaration is not valid?

• for ( int i = 99; i >= 0; i / 9 )

• for ( int i = 7; i <= 77; i += 7 )

• for ( int i = 20; i >= 2; - -i )

• for ( int i = 2; i <= 20; i = 2* i )

Evaluate the following Java expression

int x=1, y=-3, and z=13;

--z + x - y + x + y++

• 13

• 14

• 17

• 15

StringBuffer s1 = new StringBuffer("Complete");  

s1.setCharAt(1,'i'); 

  s1.setCharAt(7,'d');  

System.out.println(s1); 

• Complete

• Iomplede

• Cimpletd

• Coipletd

int x;

x = 5; {

int y = 6;

System.out.print(x + " " + y); }

System.out.println(x + " " + y);

• Compilation Error

• Runtime Error

• 5 6 5 6

• 5 6 5