Java MCQ – Multiple Choice Questions and Answers – Array – Part 2

This collection of Java Multiple Choice Questions and Answers (MCQs): Quizzes & Practice Tests with Answer focuses on “Java Array”.
 

1. Which is the benefit of Java array?

A Size unlimited

B Random access

C Code Optimization

D None of the above

Answer  

2. Array elements are stored in ________.

A Sequential memory

B Random memory

C Random & Sequential memory

D None of the above

Answer  

3. What is the output of the following code?

public class Q3
{
    public static void main(String[] args)
    {
        int[] arr = new int[0];
        System.out.print(arr.length);
    }
}

A Compilation error, the size of arrays can’t be initialized to zero.

B Compilation error, it’s arr.length() not arr.length

C 0

D None of the above

Answer  

4. What is the output of the following code?

public class Q4 
{
    public static void main(String[] args)
    {
        int[] arr = {2, 3, 012 };
        
        for(int i = 0; i < arr.length; i++)
            System.out.print(arr[i] + " ");
    }
}

A 2 3 12

B 2 3 012

C 2 3 10

D 2 3 null

Answer  

5. Which keywords used to allocate memory to an array in Java?

A malloc

B allocate

C new

D construct

Answer  

6. What is the output of the following code?

int a[] = new int[4];
System.out.print(a);

A Value stored in a[0]

B 0

C 00000

D Hexadecimal value

Answer  

7. What is the output of the following code?

public class Q7
{
    public static void main(String args[]) 
    {
        int arr[] = new int[10];

    	for (int i = 0; i < 10; ++i) 
        {
            arr[i] = i;
            System.out.print(arr[i] + " ");
            i++;
        }
    } 
}

A 0 2 4 6 8

B 1 3 5 7 9

C 0 1 2 3 4 5 6 7 8 9

D 1 2 3 4 5 6 7 8 9 10

Answer  

8. When you give an array to a method, the method receives ___________ of the array.

A The reference

B The length

C The first element

D A copy

Answer  

9. What is the output of the following code?

public class Q9
{
    public static void main(String args[]) 
    {
        float[] arr = new float[]{1, 2, 3, 4};
        System.out.println("Value is " + arr[1]);
    } 
}

A The program give a compile error due to the syntax new float[]{1, 2, 3, 4} is incorrect and it must be changed by {1, 2, 3, 4}.

B The code give a compile error due to the syntax new float[]{1, 2, 3, 4} is incorrect and it must be changed by new float[4]{1, 2, 3, 4};

C The code give a compile error due to the syntax new float[]{1, 2, 3, 4} is incorrect and it must be changed by new float[]{1.0, 2.0, 3.0, 4.0};

D The program compiles with no errors.

Answer  

10. What is the output of the following code?

public class Q10
{
    public static void main(String args[]) 
    {
        char arr [] = new char[5];

	    for (int i = 0; i < 5; ++i) 
        {
            arr[i] = 'i';
            System.out.print(arr[i] + "");
        }
    } 
}

A 1 2 3 4 5

B 1 2 3 4

C i j k l m

D i i i i i

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