Array -Java Programming MCQ Questions and Answers Page-4 section-1

31.
In Java arrays are

A. objects

B. object references

C. primitive data type

D. None of the above

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32.
Which one of the following is a valid statement?

A. char[] c = new char();

B. char[] c = new char[5];

C. char[] c = new char(4);

D. char[] c = new char[];

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33.

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);
        }
}

A. 0

B. Compilation error, arrays cannot be initialized to zero size.

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

D. None of the above

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34.

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]);
        }
}

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

B. The program has a runtime error because the array elements are not initialized.

C. The program runs fine and displays x[0] is 0.

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

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35.

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);
        }
}

A. 0

B. 1

C. 2

D. 3

E. 4

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36.

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] + " ");
        }
}

A. 120 200 16

B. 120 200 14

C. 120 200 016

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

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37.

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] + " ");
        }
}

A. 1 2 3 4

B. 0 0 0 0

C. 1 2

D. 0 0

E. None of these

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38.

Analyze the following code and choose the correct answer.

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

A. The code has compile errors because the variable arr cannot be changed once it is assigned.

B. The code has runtime errors because the variable arr cannot be changed once it is assigned.

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

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

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39.

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. The program has a compile error because new int[2]

B. The program has a runtime error because a[1] = null

C. a[1] is 0

D. a[1] is 1

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40.
When you pass an array to a method, the method receives ________ .

A. A copy of the array.

B. A copy of the first element.

C. The reference of the array.

D. The length of the array.

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31.
In Java arrays are

Answer & Solution

32.
Which one of the following is a valid statement?

Answer & Solution

33.
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); } }`

Answer & Solution

34.
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]); } }`

Answer & Solution

Answer & Solution

36.
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] + " "); } }`

Answer & Solution

37.
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] + " "); } }`

Answer & Solution

38.
Analyze the following code and choose the correct answer.

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

Answer & Solution

39.
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]); } }`

Answer & Solution

40.
When you pass an array to a method, the method receives ________ .

Answer & Solution

Array -Java Programming MCQ Questions and Answers

31. In Java arrays are

Answer & Solution

32. Which one of the following is a valid statement?

Answer & Solution

33. 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); } }

Answer & Solution

34. 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]); } }

Answer & Solution

Answer & Solution

36. 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] + " "); } }

Answer & Solution

37. 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] + " "); } }

Answer & Solution

38. Analyze the following code and choose the correct answer. int[] arr = new int[5]; arr = new int[6];

Answer & Solution

39. 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]); } }

Answer & Solution

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

Answer & Solution

31.
In Java arrays are

32.
Which one of the following is a valid statement?

33.
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); } }`

34.
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]); } }`

36.
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] + " "); } }`

37.
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] + " "); } }`

38.
Analyze the following code and choose the correct answer.

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

39.
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]); } }`

40.
When you pass an array to a method, the method receives ________ .