Java Array Model(1st)

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

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

1 Mark(s)

args[2] = null
args[2] = 2
args[2] = 3
An exception is thrown at runtime.

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

1 Mark(s)

int [] myList = {};
int myList [] = {4, 3, 7};
int myList [] [] = {4,9,7,0};
int [] myList = (5, 8, 2);

In Java arrays are

1 Mark(s)

primitive data type
objects
object references
None of the above

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]);
        }
}

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]);
        }
}

1 Mark(s)

a[1] is 0
The program has a compile error because new int[2
The program has a runtime error because a[1
a[1] is 1

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]);
        }
}

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]);
        }
}

1 Mark(s)

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 compile error because the size of the array wasn't specified when declaring the array.
The program has a runtime error because the array elements are not initialized.

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] + " ");
        }
}

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] + " ");
        }
}

1 Mark(s)

120 200 016
016 is a compile error. It should be written as 16.
120 200 14
120 200 16

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];

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];

1 Mark(s)

Which one of the following is a valid statement?

1 Mark(s)

char[] c = new char(4);
char[] c = new char[];
char[] c = new char();
char[] c = new char[5];

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

1 Mark(s)

A copy of the first element.
The length of the array.
A copy of the array.
The reference of the array.

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);
        }
}

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);
        }
}

1 Mark(s)

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] + " ");
        }
}

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] + " ");
        }
}

1 Mark(s)

1 2
None of these
0 0
0 0 0 0
1 2 3 4

Analyze the following code and choose the correct answer.

int[] arr = new int[5];
arr = new int[6];

Analyze the following code and choose the correct answer.

int[] arr = new int[5];
arr = new int[6];

1 Mark(s)

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 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.

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]);
      }
}

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]);
      }
}

1 Mark(s)

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};
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};

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);
        }
}

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);
        }
}

1 Mark(s)

Compilation error, it is a.length() not a.length
None of the above
0
Compilation error, arrays cannot be initialized to zero size.

Java Array Model(1st) : Question 1 of 14