Java Basic Programs for Beginners

Java Basic Programs for Beginners - Important Points

26.		Which of the following is a valid way to declare a constant in Java?

A. final int var = 5;

B. int const var = 5;

C. const int var = 5;

D. int var = 5; final

View Answer Discuss Work Space

Answer: option a

Explanation:

Option A is a valid way to declare a constant in Java using the final keyword.

27.		What is the output of the following program? public class Main { public static void main(String[] args) { int x = 5; int y = 2; System.out.println(x / y); } }

27.

What is the output of the following program?

public class Main {
public static void main(String[] args) {
int x = 5;
int y = 2;
System.out.println(x / y);
}
}

A. 2.5

B. 2

C. 3

D. 5

View Answer Discuss Work Space

Answer: option b

Explanation:

The / operator performs integer division when both operands are integers, so the result is 2 in this case.

28.		Which of the following is a valid way to declare and initialize a char variable in Java?

A. char var = 'a';

B. char var = "a";

C. char var = 97;

D. char var = 'a'.toUpperCase();

View Answer Discuss Work Space

Answer: option a

Explanation:

Option A is a valid way to declare and initialize a char variable in Java using single quotes.

29.		What is the output of the following program? public class Main { public static void main(String[] args) { int x = 5; int y = 2; System.out.println(x == y); } }

29.

What is the output of the following program?

public class Main {
public static void main(String[] args) {
int x = 5;
int y = 2;
System.out.println(x == y);
}
}

A. 1

B. 0

C. Compile error

D. Runtime error

View Answer Discuss Work Space

Answer: option b

Explanation:

The expression x == y compares the values of x and y for equality, which is false in this case.

30.		Which of the following is not a valid way to declare and initialize an integer array in Java?

A. int[] arr = {1, 2, 3};

B. int[] arr = new int[]{1, 2, 3};

C. int[] arr = new int[3] {1, 2, 3};

D. int[] arr = new int[3]; arr[0] = 1; arr[1] = 2; arr[2] = 3;

View Answer Discuss Work Space

Answer: option c

Explanation:

Option C is not a valid way to declare and initialize an integer array in JavWhen using the new operator to create an array, the size of the array must be specified without initializing the elements.

Worried about Placements?

Get on FAST TRACK COURSE

Java Basic Programs for Beginners

Subscribe for Latest Career Trends

Use AI and ChatGPT for Career Guidance

Unlock Your Future

Worried for Placements in 2024?

Join FAST TRACK Course

Supercharge Your SUCCESS

Join All in One Placement Mock Tests-2024