JAVA ARRAY 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 compile error because the size of the array wasn't specified when declaring the array.

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.

TRUE ANSWER : ?
YOUR ANSWER : ?

Which one of the following is a valid statement?

char[] c = new char[5];

char[] c = new char(4);

char[] c = new char();

char[] c = new char[];

TRUE ANSWER : ?
YOUR ANSWER : ?

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

None of these

1 2 3 4

1 2

TRUE ANSWER : ?
YOUR ANSWER : ?

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 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}.

TRUE ANSWER : ?
YOUR ANSWER : ?

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 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.

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

TRUE ANSWER : ?
YOUR ANSWER : ?

In Java arrays are

primitive data type

objects

object references

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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];

4

0

3

2

1

TRUE ANSWER : ?
YOUR ANSWER : ?

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

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

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

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

int [] myList = {};

TRUE ANSWER : ?
YOUR ANSWER : ?

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

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

a[1] is 0

TRUE ANSWER : ?
YOUR ANSWER : ?

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

TRUE ANSWER : ?
YOUR ANSWER : ?