Set 29

Multiple Choice Question

QID: 
405

What would be the result of compiling and running the following program?

class SomeClass{
public static void main(String args[]){
int size = 10;
int[] arr = new int[size];
for (int i = 0 ; i < size ; ++i) System.out.println(arr[i]);
}
}

Select 1 option

A. The code will fail to compile, because the int[] array declaration is incorrect.
B. The program will compile, but will throw an IndexArrayOutOfBoundsException when run.
C. The program will compile and run without error, and will print nothing.
D. The program will compile and run without error and will print null ten times.
E. The program will compile and run without error and will print 0 ten. 

Multiple Choice Question

QID: 
404

Consider the following array definitions:
int[] array1, array2[];
int[][] array3;
int[] array4[], array5[];

Which of the following are valid statements?

Select 3 options

A. array2 = array3;
B. array2 = array4;
C. array1 = array2;
D. array4 = array1;
E. array5 = array3;

Multiple Choice Question

QID: 
403

What would be the result of trying to compile and run the following program?

public class Test{
int[] ia = new int[1];
Object oA[] = new Object[1];
boolean bool;
public static void main(String args[]){
Test test = new Test();
System.out.println(test.ia[0] + " " +
test.oA[0]+" "+test.bool);
}
}

Select 1 option

A. The program will fail to compile, because of uninitialized variable 'bool'.
B. The program will throw a java.lang.NullPointerException when run.
C. The program will print "0 null false".
D. The program will print "0 null true".
E. The program will print null and false but will print junk value for ia[0].

Multiple Choice Question

QID: 
402

Given the following declaration, select the correct way to get the number of elements in the array, assuming that the array has been initialized.

int[] intArr;

Select 1 option

A. intArr[ ].length( )
B. intArr.length( )
C. intArr.length
D. intArr[ ].size( )
E. intArr.size( )

Multiple Choice Question

QID: 
401

Consider the following program...

class ArrayTest{
public static void main(String[] args){
int ia[][] = { {1, 2}, null };
for (int i = 0; i < 2; i++)
for (int j = 0; j < 2; j++)
System.out.println(ia[i][j]);
}
}

Which of the following statements are true?

Select 1 option

A. It will not compile.
B. It will throw an ArrayIndexOutOfBoundsException at Runtime.
C. It will throw a NullPointerException at Runtime.
D. It will compile and run without throwing any exceptions.
E. None of the above.

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