JAVA ARRAY QUIZ | EXAMIANS

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

int [] myList = {};

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

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

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

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 0

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

a[1] is 1

The program has a runtime error because a[1

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

An exception is thrown at runtime.

args[2] = 3

args[2] = null

TRUE ANSWER : ?
YOUR ANSWER : ?

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

The reference of the array.

A copy of the array.

The length of the array.

A copy of the first element.

TRUE ANSWER : ?
YOUR ANSWER : ?

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, arrays cannot be initialized to zero size.

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

0

None of these

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

1 2

1 2 3 4

0 0

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

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] + " "); }}

120 200 016

120 200 14

120 200 16

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

TRUE ANSWER : ?
YOUR ANSWER : ?

What is the output of the following code?public class Test{ public static void main(String args[]){ double[] myList = {1, 5, 5, 5, 5, 1}; double max = myList[0]; int indexOfMax = 0; for(int i = 1; i < myList.length; i++){ if(myList[i] > max){ max = myList[i]; indexOfMax = i; } } System.out.println(indexOfMax); }}

0

3

4

1

2

TRUE ANSWER : ?
YOUR ANSWER : ?

In Java arrays are

objects

None of these

object references

primitive data type

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 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[]{1.0, 2.0, 3.0};

TRUE ANSWER : ?
YOUR ANSWER : ?