JAVA ARRAY QUIZ | EXAMIANS

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

A copy of the array.

A copy of the first element.

The length of the array.

The reference of the array.

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What will be the output of the program?public class Test{ public static void main(String [] args){ String s1 = args[1]; String s2 = args[2]; String s3 = args[3]; String s4 = args[4]; System.out.print(" args[2] = " + s2); }}and the command-line invocation is C:Java> java Test 1 2 3 4

args[2] = 2

args[2] = null

An exception is thrown at runtime.

args[2] = 3

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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 runs fine and displays x[0] is 0.

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

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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Which will legally declare, construct, and initialize an array?

int [] myList = {};

int myList [] [] = {4,9,7,0};

int myList [] = {4, 3, 7};

int [] myList = (5, 8, 2);

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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[]{1.0, 2.0, 3.0};

The program compiles and runs fine and the output

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[3]{1, 2, 3};

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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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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

1 2 3 4

None of these

0 0

1 2

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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); }}

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

None of these

Compilation error, arrays cannot be initialized to zero size.

0

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

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.

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What is the value of a[1] after the following code is executed?int[] a = {0, 2, 4, 1, 3};for(int i = 0; i < a.length; i++)a[i] = a[(a[i] + 3) % a.length];

3

4

1

0

2

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