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| Interview Questions and Answers for 'Bally technologies' - 3 question(s) found - Order By Newest | ||||
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| Ans. ConcurrentHashMap is a hashMap that allows concurrent modifications from multiple threads as there can be multiple locks on the same hashmap. | ||||
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 Discuss Correct / Improve  java collections hashmap map concurrenthashmap concurrenthashmap concurrency general electric ge  Asked in 32 Companies  rare | ||||
 Related Questions | ||||
 What is ConcurrentModificationException ? | ||||
| What is a BlockingQueue? | ||||
| What is concurrent interface ? | ||||
| What is ConcurrentLinkedDeque ? | ||||
| What is CopyOnWriteArrayList ? | ||||
| What are the advantages and disadvantages of CopyOnWriteArrayList ? | ||||
| Name few Concurrent Collection Classes ? | ||||
| Difference between concurrentHashMap and HashTable ? | ||||
| isnt the use of HashTable and ConcurrentHashMap the same, i.e providing synchronized map collection ? | ||||
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| Ans. BlockingQueue is a Queue that supports operations that wait for the queue to become non-empty when retrieving and removing an element, and wait for space to become available in the queue when adding an element. | ||||
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| Discuss Correct / Improve blockingqueue collections java concurrent collections Asked in 10 Companies | ||||
| Related Questions | ||||
| What is a BlockingQueue ? | ||||
 Very frequently asked. Usually asked with questions related to String. Frequently asked at CTS / Cognizant | ||||
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| Ans. Object that can't be changed after instantiation. | ||||
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Discuss Correct / Improve java oops immutable immutability Asked in 27 Companies  basic frequent | ||||
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| Why is String immutable in Java ? | ||||
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| How to implement an immutable class ? | ||||
| What is an immutable class ? | ||||
| Does Declaring an object "final" makes it immutable ? | ||||
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| What are stateless objects ? How are they different from immutable objects ? Which of these two is thread safe ? | ||||
