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|Java - Interview Questions and Answers|
|Ans. 1. Switching Overheads - Even though multi threading aims at improving performance by reducing the wait time and hence improving overall throughput, there is a cost of switching resources between threads and sometime this cost can surpass the benefits if there isnt much wait for IO or external communication.|
2. Debugging is hard with multi threaded code.
3. Deadlock - Execution of multi threaded code many a times lead to deadlock due to shared resources.
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| Which keyword is used to provide explicit access of a code block to single thread ? |
|Explain multithreading in Java ?|
|Can constructors be synchronized in Java ?|
|What is the difference between time slicing and preemptive scheduling ?|
|What is a Deadlock ?|
|Explain Thread States ?|
|Why do we need Thread class even in case we execute thread using runnable interface ?|
|If you need to consume messages from the queue faster, which approach will you recommend - batching or concurrency ?|
|What is an object's lock and which object's have locks?|
|Different ways of implementing Threads in Java ?|