Java Quizzz

Front

Which of the following is NOT a Java access modifier?
public
private
internal
protected

Back

internal

Front

What is the default value of a boolean variable in Java if it’s an instance variable?

Back

false

Front

Which keyword is used to prevent a class from being inherited?

Back

final

Front

What is the size of a Java char?

Back

2 bytes

Front

Which of these exceptions is unchecked in Java? IOException, SQLException, NullPointerException, FileNotFoundException

Back

NullPointerException

Front

What happens when you try to override a final method?

Back

Compilation Error

Front

Which package contains the Collection interface?

Back

java.util

Front

What is the output of System.out.println(9/2); in Java?

Back

4

Front

What is the output of: System.out.println("Java" + 10 + 20);

Back

Java1020

Front

What is the output of: System.out.println(10 + 20 + "Java");

Back

30Java