Java Basic Programs for Beginners

Java Basic Programs for Beginners - Important Points

6.		What is the output of the following program? public class Main { public static void main(String[] args) { String str = "Hello World"; System.out.println(str.charAt(6)); } }

What is the output of the following program?

public class Main {
public static void main(String[] args) {
String str = "Hello World";
System.out.println(str.charAt(6));
}
}

A. H

B. e

C. W

D. o

View Answer Discuss Work Space

Answer: option c

Explanation:

The charAt() method of the String class returns the character at the specified index, starting from 0.

7.		What is the output of the following program? public class Main { public static void main(String[] args) { int x = 5; int y = 10; System.out.println(x == y); } }

What is the output of the following program?

public class Main {
public static void main(String[] args) {
int x = 5;
int y = 10;
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.

8.		Which of the following is not a primitive data type in Java?

A. int

B. boolean

C. string

D. double

View Answer Discuss Work Space

Answer: option c

Explanation:

string is not a primitive data type in JavIt is a class in the Java standard library.

9.		What is the output of the following program? public class Main { public static void main(String[] args) { int x = 5; int y = 10; System.out.println(x < y); } }

What is the output of the following program?

public class Main {
public static void main(String[] args) {
int x = 5;
int y = 10;
System.out.println(x < y);
}
}

A. 1

B. 0

C. Compile error

D. Runtime error

View Answer Discuss Work Space

Answer: option a

Explanation:

The expression x < y compares the values of x and y for inequality, which is true in this case.

10.		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); } }

10.

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. 2

C. 3

D. 5

View Answer Discuss Work Space

Answer: option a

Explanation:

The % operator returns the remainder of the division of the two operands, which is 1 in this case.

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