Serialization in Java is one of the most vital topics. And it becomes even more important if you are planning for a Java programming interview. In Java world, programmers commonly use Serialization during project assignments. And the interviewers are keen to know whether you know about Serialization in depth or not, whether you can handle Serialization process or not and lot more. In this Java quiz, we’ll cover all the top serialization interview questions which can be asked during Java interviews and will provide you with an explanatory answer.
Any Java interview could have a minimum of 2-3 questions on this topic. And if a candidate is not aware of Serialization in Java, he/she will certainly feel uncomfortable due to lack of knowledge. This post enlists best 20 Java Serialization interview questions which are worth attempting before you plan to go for an interview. It will not only teach you about key Java serialization concept but will keep you engage throughout the Java quiz.
Java Serialization Interview Questions For Job Seekers.
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1. Question10 points
Which of the following interface would you implement for a serializable class?CorrectIncorrect
2. Question10 points
Which of the following is a correct difference between Serializable and Externalizable interface in Java?CorrectIncorrect
3. Question10 points
Please select when will you use the Serializable interface?CorrectIncorrect
4. Question10 points
Please select when will you use the Externalizable interface?CorrectIncorrect
5. Question10 points
Which of the following correctly defines the behaviour of a transient variable?CorrectIncorrect
6. Question10 points
What will be the value of a transient variable after deserialization?CorrectIncorrect
7. Question10 points
Do you need to implement any method of Serializable interface to make an object serializable?CorrectIncorrect
8. Question10 points
What happens if an object is serializable but it includes a reference to a non-serializable object?CorrectIncorrect
9. Question10 points
Which of the following is the correct behaviour for static variables during serialization?CorrectIncorrect
10. Question10 points
What would happen with the superclass instance variables of a class if the class is serializable but its superclass is not?CorrectIncorrect
11. Question10 points
Which of the following do you think is the purpose of the writeObject() and readObject() methods in Serialization process?CorrectIncorrect
12. Question10 points
What are the different approaches for making an object Serializable other than Serializable interface?CorrectIncorrect
13. Question10 points
What would happen if you try to alter any class variable without specifying the serialVersionUID ?CorrectIncorrect
14. Question10 points
Which of the following is not the correct method to generate a SerialVersionUID ?CorrectIncorrect
15. Question10 points
Which of the following is not a valid reason for static member variables being out of the java serialization process?CorrectIncorrect
16. Question10 points
What will be the values of int and Integer transient members of a class after the DeSerialization process?CorrectIncorrect
17. Question10 points
How can a subclass prevent from Serialization if its superClass supports Serialization?CorrectIncorrect
18. Question10 points
Please select when to add readObjectNoData() during serialization?CorrectIncorrect
Note: When a class has instance fields which are serializable and extendable, there is a caution you should be aware of. If the class has invariants that would be violated if its instance fields were initialized to their default values (zero for integral types, false for boolean, and null for object reference types)
19. Question10 points
What would happen if one of the class members doesn’t implement Serializable interface?CorrectIncorrect
20. Question10 points
What is the need of the Serialization Proxy Pattern?CorrectIncorrect
Note: You can check all the answers at the end of this quiz. To learn more about Java language, please refer the on-line Java learning documentation.
We hope this Java Serialization Interview Questions would help the aspiring software developers and testers in learning and finding confidence in their overall Java skills. We sincerely wish them success and thank them for attempting this Java quiz. We recommend them that don’t stop after the quiz instead check out some other wonderful quizzes and tutorial on Java/Python/Selenium and related programming stuff on our blog. Some of them are given below which you can try and go for an interview with great preparation.
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See what James Gosling the co-founder of Java has to say about Java and C++.
“Java Is C++ Without The Guns, Knives, And Clubs.”
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