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Java Developer Interview Preparation Course
Rating: 4.4 out of 5(224 ratings)
7,897 students

Java Developer Interview Preparation Course

This course will prepare you for Java interviews
Created byCode Decode
Last updated 2/2022
English

What you'll learn

  • Candidate will get prepared for Java Interview by completing this course
  • This is self paced course.
  • Everyone from college to working candidate can attend this course before attending Interviews
  • It will contain Interview Questions which is mostly asked in Java Interviews

Course content

2 sections • 27 lectures • 1h 34m total length

  • Why Java is not 100% Object Oriented1:01

    Java is not 100 percent object oriented because it uses primitive types wrapped by wrapper classes to become objects, so not everything revolves around objects.

  • Is Java Pass by value or Pass by reference8:22
  • What is Covariant return type in Java ?5:10
  • What is Equals and Hash Code contract ?13:00

    Explore the Java equals and hash code contract, implement equals, override hashCode, and understand shallow versus deep comparison for reliable map behavior.

  • Why Pointers are not used in Java ?1:05
  • What is JIT compiler in Java ?2:02
  • Why String is immutable in Java ?1:02
  • What is Marker Interface ?1:32
  • Can you override a private or static method in Java ?1:56

    Discover why private and static methods cannot be overridden in Java, how method hiding works with the same name and arguments, and referencing such methods with the class name.

  • Does finally always execute in Java ?0:46
  • How to break Singleton Design pattern in Java ?18:33
  • What methods does Object class have ?1:59
  • How to make class Immutable ?1:52

    Learn six steps to make a class immutable in Java by declaring the class final, fields private and final, and always cloning or copying objects rather than returning real references.

  • How to make a class Singleton ?1:34
  • Explain the Collection Hierarchy3:12
  • What is List interface in Java ?2:26

    Focus on java list interface implementations: arraylist, linkedlist, vector, and stack; compare non-synchronous arraylist growth by 50 percent, vector doubling, insertion order, and synchronization differences.

  • What is set Interface in Java ?2:52
  • What is Queue Interface in Java ?2:03
  • What is Map Interface in Java ?2:06
  • Why map does not extend Collection Interface ?1:29
  • What is the difference between fail fast and fail safe Iterator ?1:50
  • What is Blocking Queue ?1:17
  • Difference between synchronized collection and concurrent collection2:05
  • Explain Internal working of Hashmap6:26

Requirements

  • Core Java

Description

Most asked Java Interview Questions you must know irrespective of the fact if you're experienced or fresher.

This course will help you to sail through basic technical Interview rounds and covers basic question that you must know before facing any Java interview.

We had to limit this course due to the Udemy limitation of uploading only 2 hours of free course to users. Thus we have to break the whole course into multiple courses but we have segregated it in basic, intermediate and advanced level so that it will help you too to identify where do you really stand before appearing in any technical discussion with IT companies.

We do have intermediate and advanced level courses upcoming in few days.

The motive of this course is just to make you interview ready and motivated and confident in the interview. What we could cover in 2 hours is :

  1. Why Java is not 100% Object Oriented

  2. Is Java Pass by value or Pass by reference

  3. What is Covariant return type in Java ?

  4. What is Equals and Hash Code contract ?

  5. Why Pointers are not used in Java ?

  6. What is JIT compiler in Java ?

  7. Why String is immutable in Java ?

  8. What is Marker Interface ?

  9. Can you override a private or static method in Java ?

  10. Does finally always execute in Java ?

  11. What methods does Object class have ?

  12. How to make class Immutable ?

  13. How to make a class Singleton ?

  14. How to break Singleton Design pattern in Java ?

  15. Explain the Collection Hierarchy

  16. What is List interface in Java ?

  17. What is set Interface in Java ?

  18. What is Queue Interface in Java ?

  19. What is Map Interface in Java ?

  20. Why map does not extend Collection Interface ?

  21. What is the difference between fail fast and fail safe Iterator ?

  22. What is Blocking Queue ?

  23. Difference between synchronized collection and concurrent collection

  24. Explain Internal working of Hashmap

  25. Why Java 8 was introduced ?

  26. What are the advantages of Java 8 ?

  27. What is Lambda expression ?

Who this course is for:

  • Everyone from college to working candidate can attend this course before attending Interviews

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