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|Interview Questions and Answers|
|Advanced level question usually asked in High end product companies. Have been asked in Google and Amazon (Based on 1 Feedback)|
|Ans. The Java runtime environment deletes objects when it determines that they are no longer being used. This process is known as garbage collection. The Java runtime environment supports a garbage collector that periodically frees the memory used by objects that are no longer needed. The Java garbage collector is a mark-sweep garbage collector that scans Java dynamic memory areas for objects, marking those that are referenced. After all possible paths to objects are investigated, those objects that are not marked (i.e. are not referenced) are known to be garbage and are collected.|
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|Like Discuss Correct / Improve  java   garbage collection   java memory management   advanced Asked in 21 Companies intermediate   frequent|
Try 4 Question(s) Test
|Why Char array is preferred over String for storing password?|
|Does garbage collection guarantee that a program will not run out of memory?|
|Let's suppose we have an to destroy objects, Design a program to implement garbage collection ?|
|Should we override finalize method ?|
|What are strong, soft, weak and phantom references in Java ?|
|Can we call the garbage collector explicitly ?|
|What does String intern() method do?|
|Which type of memory is cleaned / recovered by garbage collection - stack or heap ?|
|Java doesn't provide exclusive access to memory like C/C++ and other lower level languages ? What are the advantanges and disadvantages ?|