Java Interview Questions
Recently I attended an interview with one of the reputed MNC. I felt the interview questions were good and thought it would be helpful for people if I share them.
Core Java
- How to fetch values of a map and put into sorted set?
- Difference b/w 'is a' and 'has a' relationships?
- Explain final, finally & finalize keywords?
- Can a method be final? Why do we have a method to be final?
- Can a class be final?
- Diff between synchronize and serialization?
- Can a static method be synchronized?
- Diff between “” and string object?
Advanced Java
- what are different memories we have in HEAP?
- What are different types of Garbage Collections(GC) we have?
- whats the contract between hash-code and equals method?
- Can an Object (Object class) be set into key of a map? What should we be aware of before doing it?
- When we move code from java 8 to java 9, what difficulties we face?
- Have you read new features of Java 9? Jigsaw?
- When to use thread dump?
- When to use heap dump?
- New java tools coming with java? There are tools like Profiler (JProbe, Yourkit or Netbeans Profiler), JConsole, VisualVM
- Thread Profiling?
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