Output of Java Programs | Set 47 (Arrays)

Prerequisite : Arrays in Java

Question 1. What is the output of this question?

class Test1 {
public
    static void main(String[] args)
    {
        int arr[] = { 11, 22, 33 };
        for (int i = 0; i < arr.length; i++)
            System.out.print(arr[i] + " ");

        System.out.println();

        int arr2[] = new int[3];
        arr2[] = { 11, 22, 33 };
        for (int i = 0; i < arr2.length; i++)
            System.out.print(arr2[i] + " ");
    }
}

Option
A) 11 22 33
11 22 33
B) Error
C) Exception
D) None

Output: B

Explanation : It’s not a valid Syntax for array declarations. It will give compile time error : not a statement arr2[] = {11, 22, 33}

Question 2. What is the output of this question?

class Test2 {
public
    static void main(String[] args)
    {
        String str[] = { "Geeks", "for", "Geeks" };
        for (int i = 0; i < str.length; i++)
            System.out.print(str[i]);
    }
}
A)GeeksforGeeks
B)Error
C)Geeks
D)GfG

Option

Output: A

Explanation : It is a simple one dimension string type array.

Question 3. What is the output of this question?

class Test2 {
public
    static void main(String[] args)
    {
        String str[] = { "Geeks", "for", "Geeks" };
        System.out.println(str.length);
        System.out.println(str[0].length);
    }
}

Option
A)Error
B)3
5
C)3
13
D)None

Output: A

Explanation : length is applied only to find the size of array. If we are try get the size of string object, then we will get compile time error : cannot find symbol.

Question 4. What is the output of this question?

class Test4 {
public
    static void main(String[] args)
    {
        int number = 11;
        int NUMBER = 22;
        int Number = 33;
        System.out.print(number + " ");
        System.out.print(NUMBER + " ");
        System.out.println(Number);
    }
}

Option
A)11 22 33
B)11 11 11
C)33 33 33
D)error

Output:A 

Explanation : Java is case sensitive. Therefore, here three different int type variable are there.

Question 5. What is the output of this question?

class Test5 {
public
    static void main(String[] args)
    {
        String str[] = { "geeks", "for", "geeks" };
        System.out.print(str[0] + str[1] + str[2]);
    }
}

Option
A)geeksforgeeks
B)gfg
C)Error
D)none

Output : A 

Explanation : In Java + operator can concatenate the string.