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Java Certification Questions
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Java Certification Questions
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25 Questions

1. When do static blocks get executed?

2. What is an unchecked exception?

3. 3 things the super keyword is used for

4. What is an array?

5. Primitive vs Reference (Non-primitive) data types

6. Where is the only place we can initialize a blank final variable (final variable that was not initialized during declaration)?

7. What are the 2 different types of exceptions?

8. A static method can access static and instance variables (T/F)

9. Integer data types in order (largest to smallest)

10. What does the class loader within the JVM do?

11. Abstract classes can be instantiated (T/F)

12. Why do we need static methods?

13. What are the two types of data type conversion?

14. What is an example of an entry-controlled loop?

15. What is the 'this' keyword?

16. When does an object become eligible for garbage collection?

17. When overriding, a method should not have a

18. What is JRE?

19. How are parameterized constructors of parent class invoked?

20. We cannot overload methods by their return type, i.e., two or more methods are not overloaded if they

21. The methods declared in an interface are implicitly

22. What is the default type of String?

23. What happens when parameters are passed by value?

24. How can you force child classes to implement important methods defined in the parent class?

25. Length is a method to get the size of an array (T/F)

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