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|Java - Interview Questions and Answers|
|Ans. When you declare a member/variable as volatile, you are forcing threads to read values from main memory instead of thread memory. |
When you declare as atomic, the read and update/write operations are performed as a single unit. A lock is acquired during atomic operation.
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|Difference between == and .equals() ?|
|Why is String immutable in Java ?|
| Explain the scenerios to choose between String , StringBuilder and StringBuffer ?|
What is the difference between String , StringBuilder and StringBuffer ?
|What are the difference between composition and inheritance in Java?|
|What are different ways to create String Object? Explain.|
|Why do we need Inner classes ? Cant we just work with outer classes wherever we implement Inner classes ?|
|Does garbage collection guarantee that a program will not run out of memory?|
|Why Char array is preferred over String for storing password?|
|What do you mean by "Java is a statically typed language" ?|
|What is the difference between Encapsulation and Abstraction?|