Question 1: What is the default value of a boolean variable in Java?

Question 2: Which of these is NOT a valid Java identifier?

Question 3: What is the size of an int in Java?

Question 4: Which method is the entry point of a Java application?

Question 5: What is the output of: System.out.println(10 + 20 + "Hello");

Question 6: Which concept allows a class to inherit features from another class?

Question 7: What is the superclass of all classes in Java?

Question 8: Which keyword is used to prevent method overriding?

Question 9: What is the purpose of the 'this' keyword?

Question 10: Which access modifier provides the widest accessibility?

Question 11: Which of these is a checked exception?

Question 12: What is the purpose of the finally block?

Question 13: Which keyword is used to throw an exception explicitly?

Question 14: Which collection class maintains insertion order?

Question 15: What is the primary interface for all collections?

Question 16: Which Map implementation allows null keys and values?

Question 17: What is the purpose of the synchronized keyword?

Question 18: Which Java feature was introduced in Java 8?

Question 19: What does JVM stand for?

Question 20: Which method is used to compare two strings for equality?

Java Topic

Java Basics Quiz (1 - 20)