DC MOTORS QUIZ | EXAMIANS

What will be the output?public class Test{ public static void main(String[] args){ int[] x = new int[3]; System.out.println("x[0] is " + x[0]); }}

The program has a runtime error because the array element x[0] is not defined.

The program runs fine and displays x[0] is 0.

The program has a runtime error because the array elements are not initialized.

The program has a compile error because the size of the array wasn't specified when declaring the array.

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Determine output:public class Test{ public static void main(String[] args){ int[] x = {1, 2, 3, 4}; int[] y = x; x = new int[2]; for(int i = 0; i < x.length; i++) System.out.print(y[i] + " "); }}

0 0 0 0

0 0

1 2

None of these

1 2 3 4

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What is the result of compiling and running the following code?public class Test{ public static void main(String[] args){ int[] a = new int[0]; System.out.print(a.length); }}

None of these

Compilation error, it is a.length() not a.length

0

Compilation error, arrays cannot be initialized to zero size.

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Analyze the following code and choose the correct answer.int[] arr = new int[5];arr = new int[6];

The code has compile errors because the variable arr cannot be changed once it is assigned.

The code has compile errors because we cannot assign a different size array to arr.

The code has runtime errors because the variable arr cannot be changed once it is assigned.

The code can compile and run fine. The second line assigns a new array to arr.

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In Java arrays are

objects

object references

None of these

primitive data type

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When you pass an array to a method, the method receives ________ .

A copy of the first element.

A copy of the array.

The length of the array.

The reference of the array.

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What will be the output?public class Test{ public static void main(String[] args){ int[] a = new int[4]; a[1] = 1; a = new int[2]; System.out.println("a[1] is " + a[1]); }}

a[1] is 1

The program has a runtime error because a[1

a[1] is 0

The program has a compile error because new int[2<sp< label=""></sp<>

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What is output of the following code:public class Test{ public static void main(String[] args){ int[] x = {120, 200, 016 }; for(int i = 0; i < x.length; i++) System.out.print(x[i] + " "); }}

120 200 16

120 200 14

120 200 016

016 is a compile error. It should be written as 16.

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Which one of the following is a valid statement?

char[] c = new char(4);

char[] c = new char();

char[] c = new char[];

char[] c = new char[5];

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What would be the result of attempting to compile and run the following code?public class HelloWorld{ public static void main(String[] args){ double[] x = new double[]{1, 2, 3}; System.out.println("Value is " + x[1]); }}

The program has a compile error because the syntax new double[]{1, 2, 3} is wrong and it should be replaced by new double[3]{1, 2, 3};

The program has a compile error because the syntax new double[]{1, 2, 3} is wrong and it should be replaced by {1, 2, 3}.

The program has a compile error because the syntax new double[]{1, 2, 3} is wrong and it should be replaced by new double[]{1.0, 2.0, 3.0};

The program compiles and runs fine and the output

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