Java Programming - Arrays Questions And Answers

1. Which of these function is used to allocate memory to array variable in Java?

[A] malloc

[B] alloc

[C] new

[D] calloc

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2. Which of these is necessary to specify at time of array initialization?

[A] Row

[B] Column

[C] Both Row and Column

[D] None of the mentioned

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3. What will be printed using following code block?

int[] a = {0,1,2,3,4,5,6,7};

System.out.println(a.length);

[A] 6

[B] 7

[C] 8

[D] 9

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4. What will happen when following Java code block is compiled and run?

public class A {



 public static void main(String argv[]){ 



 int ary[]=new int[]{1,2,3};



 System.out.println(ary[1]); 



    } 



}

[A] 1

[B] Compilation Error: Incorrect Syntax

[C] 2

[D] Compilation Error: size of array must be defined

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5.

What will happen if following code block is compiled/run?

int[] iArray = new int[10];



iArray.length = 15;



System.out.println(iArray.length);

[A] Prints 10

[B] Prints 15

[C] Compilation Error

[D] Run Time Error

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6. 6.Will the following program compile successfully ?



class MyArray 



{



 public static void main(String[] args) 



    {



int arr1[]=new int[2]{1,2};



 int arr2[]=new int[]{1,2,3};    



    }



}

[A] Yes

[B] No

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7.

Given a one dimensional array arr, what is the correct way of getting the number of elements in arr.

Select the one correct answer.

[A] arr.length

[B] arr.length - 1

[C] arr.size

[D] arr.size - 1

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8. 8.What is the output of the following program?



class MyMethod 



{



 static int func( int i)



    {



 return  ++i;



    }



   public static void main(String[] args) 



    {



        int i=0;



        int j=func(i++) + i + func(++i);



        System.out.println(i);



        System.out.println(j);



    }



}

[A] 5 2

[B] 2 5

[C] 2 6

[D] 2 4

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9. What is the output of this program?



  class evaluate {



        public static void main(String args[]) 



            { 



        int arr[] = new int[] {0 , 1, 2, 3, 4, 5, 6, 7, 8, 9}; 



        int n = 6;



                n = arr[arr[n] / 2]; 



        System.out.println(arr[n] / 2);



            }

}

[A] 3

[B] 0

[C] 6

[D] 1

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10. What is the output of this program?

class array_output {

        public static void main(String args[]) 

        {

            char array_variable [] = new char[10];

	    for (int i = 0; i < 10; ++i) {

                array_variable[i] = 'i';

                System.out.print(array_variable[i] + "");

            }

        } 

    }

[A] 1 2 3 4 5 6 7 8 9 10

[B] 0 1 2 3 4 5 6 7 8 9 10

[C] i j k l m n o p q r

[D] i i i i i i i i i i

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Java Programming - Arrays Questions And Answers

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