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Java Interview Questions and Answers – New Version http://dougleschan.com/the-recruitment-guru/tell-me-about-yourself/job-interview-questions-and-answers-part-3-tell-me-about-yourself/

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Java Interview Questions and Answers for freshers and experienced.

Questions Discussed:

1 . Why is Java so popular?
2 . What is platform independence?
3 . What is bytecode?
4 . Compare JDK vs JVM vs JRE
5 . What are the important differences between C++ and Java?
6 . What is the role for a classloader in Java?
7 . What are Wrapper classes?
8 . Why do we need Wrapper classes in Java?
9 . What are the different ways of creating Wrapper class instances?
10 . What are differences in the two ways of creating Wrapper classes?
11 . What is auto boxing?
12 . What are the advantages of auto boxing?
13 . What is casting?
14 . What is implicit casting?
15 . What is explicit casting?
16 . Are all String’s immutable?
17 . Where are String values stored in memory?
18 . Why should you be careful about String concatenation(+) operator in loops?
19 . How do you solve above problem?
20 . What are differences between String and StringBuffer?
21 . What are differences between StringBuilder and StringBuffer?
22 . Can you give examples of different utility methods in String class?

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11 thoughts on “Java Interview Questions and Answers – New Version http://dougleschan.com/the-recruitment-guru/tell-me-about-yourself/job-interview-questions-and-answers-part-3-tell-me-about-yourself/

  1. I didn't find videos really good , due to three reasons…
    concepts repeated here are not that clear. you are just repeating the sentences,some time dodging.
    This is like covering the same stuff when we start learning java..
    Key elements are missing. and only 10 percent of the questions fall in category of interview.
    Other wise keep it up best of luck.
    Thank You

  2. well sir i am looking for startup and i go for interview in many companies and they dnt ask these questions they ask questions:
    What is optimization??
    How will you create a profile in java??
    What is serianiam??
    How Java Differnciate between checked and unchecked exception??
    Diffrence between Encapsulation and Abstarction in detail?
    How will JVM find which exception is checked and which is unchecked??
    What is sharedlock?
    And Many more now i dnt find these basic question helpfull for interview because the expectations of interviewer is much more from java freshers..

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