Java Debugging Questions - M

What is the error in the following code?

public class Test {

public static void main(String[] args) {
int x = 10;
x = x *;
System.out.println(x);
}
}

• Missing operand

• Missing semicolon

• Undefined variable

• No error

What will be the output of the following code? public class Test { public static void main(String[] args) { int x = 5 / 0; System.out.println(x); } }

• 0

• Infinity

• Compilation Error

• Runtime Exception

Identify the error in this code: public class Example { public static void main(String[] args) { int arr[5] = {1,2,3,4,5}; System.out.println(arr[2]); } }

• Syntax error in array declaration

• Index out of bounds

• Logical Error

• No error

What is the issue with this Java snippet? class Demo { static int x; public static void main() { System.out.println(x); } }

• x is not initialized

• main method signature is incorrect

• No error

• Class must be abstract

What will happen when executing the following program? class Test { public static void main(String args) { System.out.println("Hello World"); } }

• Compilation Error

• Runtime Error

• Prints 'Hello World'

• Infinite loop

Find the mistake in this Java program: public class Test { public static void main(String[] args) { int x; System.out.println(x); } }

• Variable x is not initialized

• Syntax error

• x must be final

• No error

Which statement is true about this code? public class Test { public static void main(String[] args) { String str = null; System.out.println(str.length()); } }

• NullPointerException occurs

• Prints 0

• Compilation Error

• No error

What happens when executing this code? class Parent {} class Child extends Parent {} class Test { public static void main(String[] args) { Parent obj = new Child(); System.out.println(obj.instanceOf Child); } }

• Compilation Error

• Runtime Error

• True

• False

What will be printed? public class Example { public static void main(String[] args) { System.out.println(10 + 20 + "30"); } }

• 3030

• 102030

• 50

• Compilation Error

What is the problem in this code? public class Demo { public static void main(String[] args) { final int x = 10; x = 20; System.out.println(x); } }

• Final variable cannot be changed

• No error

• Logical error

• Compilation Warning