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Interview Questions and Answers for 'Bally technologies' - 2 question(s) found - Order By Newest

Very frequently asked. Usually asked with questions related to String.
  Q1. What is an Immutable Object ?Core Java
Anonymous
Ans. Object that can't be changed after instantiation.

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Related Questions

  Why is String immutable in Java ?
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  How to implement an immutable class ?
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  What are advantages of stateless and / or immutable objects ?


 Q2. What is a ConcurrentHashMap ?Core Java
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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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Related Questions

  What is ConcurrentLinkedDeque ?
  What is CopyOnWriteArrayList ?
  What are the advantages and disadvantages of CopyOnWriteArrayList ?
  Name few Concurrent Collection Classes ?
  What is ConcurrentModificationException ?
  What is a BlockingQueue?
 Difference between concurrentHashMap and HashTable ?
 isnt the use of HashTable and ConcurrentHashMap the same, i.e providing synchronized map collection ?
 What is the use of java.util.concurrent package in Java ?




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