JavaQuizzes

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Multiple Choice Question

Submitted by heartin on Sun, 08/23/2015 - 12:31
QID: 
17

Given:

class HelloWorld{

  public static void main (String[] args)
  {
    System.out.println("Hello"+1+3-2);
  }

}

A. Compilation fail

B. Compilation succeeds, but execution will fail with an exception

C. Compile and run successfully and print Hello123

D. Compile and run successfully and print Hello11

Multiple Choice Question

Submitted by heartin on Sat, 09/05/2015 - 08:39
QID: 
18

Which of these array declarations and initializations are NOT legal?

 

Select 2 options

A. int[ ] i[ ] = { { 1, 2 }, { 3 }, { }, { 4, 5, 6 } } ;

B. int i[ ] = new int[2] {1, 2} ;

C. int i[ ][ ] = new int[ ][ ] { {1, 2, 3}, {4, 5, 6} } ;

D. int i[ ][ ] = { { 1, 2 }, new int[ 2 ] } ;

E. int i[4] = { 1, 2, 3, 4 } ;

Multiple Choice Question

Submitted by heartin on Sat, 09/05/2015 - 08:44
QID: 
19

Which of the following code fragments will successfully initialize a two-dimensional array of chars named cA with a size such that cA[2][3] refers to a valid element?

1. char[][] cA = { { 'a', 'b', 'c' }, { 'a', 'b', 'c' } };

2. char cA[][] = new char[3][];

       for (int i=0; i<cA.length; i++) cA[i] = new char[4];

3.char cA[][] = { new char[ ]{ 'a', 'b', 'c' } , new char[ ]{   'a', 'b', 'c' } };

4char cA[3][2] = new char[][] { { 'a', 'b', 'c' }, { 'a', 'b','c' } };

5.char[][] cA = { "1234", "1234", "1234" };

 

Select 1 option

A. 1, 3

B. 4, 5

C. 2, 3

D. 1, 2, 3

E. 2

Multiple Choice Question

Submitted by heartin on Sat, 09/05/2015 - 08:46
QID: 
20

What will the following program print?

class Test{

public static void main(String[] args){

int i = 4;

int ia[][][] = new int[i][i = 3][i];

System.out.println( ia.length + ", " + ia[0].length+", "+ ia[0][0].length);

}

}

Select 1 option

A. It will not compile.

B. 3, 4, 3

C. 3, 3, 3

D. 4, 3, 4

E. 4, 3, 3

Multiple Choice Question

Submitted by heartin on Tue, 09/08/2015 - 08:47
QID: 
21

What will happen when the following code is compiled and run?

class AX{

static int[] x = new int[0];

static{

x[0] = 10;

}

public static void main(String[] args){

AX ax = new AX();

}

}

Select 1 option

A. It will throw NullPointerException at runtime.

B. It will throw ArrayIndexOutOfBoundsException at runtime.

C. It will throw ExceptionInInitializerError at runtime.

D. It will not compile.

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