JAVA ARRAY QUIZ | EXAMIANS

Which one of the following is a valid statement?

char[] c = new char();

char[] c = new char[];

char[] c = new char(4);

char[] c = new char[5];

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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); }}

0

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

None of these

Compilation error, arrays cannot be initialized to zero size.

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YOUR ANSWER : ?

In Java arrays are

objects

None of these

object references

primitive data type

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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); }}

2

0

4

1

3

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

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

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

int [] myList = {};

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

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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 {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 new double[]{1.0, 2.0, 3.0};

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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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

0

2

4

1

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

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 runs fine and displays x[0] is 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 can compile and run fine. The second line assigns a new array to arr.

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

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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

An exception is thrown at runtime.

args[2] = 3

args[2] = null

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