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Interview Questions and Answers for 'Bally technologies' - 3 question(s) found - Order By Newest

 Q1. What is a ConcurrentHashMap ?Core Java
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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   Like         Discuss         Correct / Improve     java   collections   hashmap   map   concurrenthashmap   concurrenthashmap  concurrency   general electric   ge     Asked in 32 Companies        rare


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  What is ConcurrentModificationException ?
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  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 ?


 Q2. What is a BlockingQueue?Data Structures
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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   Like         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
  Q3. What is an Immutable Object ?Core Java
Ans. Object that can't be changed after instantiation.

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   Like         Discuss         Correct / Improve     java   oops   immutable  immutability     Asked in 27 Companies      basic        frequent

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  What are stateless objects ? How are they different from immutable objects ? Which of these two is thread safe ?



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