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Core Java - Interview Questions and Answers for 'Concurrenthashmap' - 7 question(s) found - Order By Newest

 Q1. 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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   Like      Discuss      Correct / Improve     java   collections   hashmap   map   concurrenthashmap   concurrenthashmap  concurrency   general electric   ge     Cognizant (CTS)  Synechron  General Electric  MakeMyTrip.com  Nomura Securities  Xpanxion  Royal Bank of Scotland (RBS)  ProKarma  Talentica  Citi  EdgeVerve Systems  Six Dee Telecom  ReqRoute  Qumulo  Goldman Sachs  HSBC Holdings  AlertMe.com  BlackRock  Helpchat  Bally Technologies  Hubzu  Xpanxion  Coromandel Infotech  Paytm  YuMe  InfoGain  Markit  Wells Fargo  Geometric  Acloudzyn Technologies  Roposo  Nagarvision        rare


 Q2. Difference between concurrentHashMap and HashTable ?Core Java2017-01-29 18:37:04

Ans. HashTable locks the complete collection to provide synchronization whereas ConcurrentHashMap only locks segments to achieve synchronization and hence better efficient and faster.

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   Like      Discuss      Correct / Improve     concurrentHashMap  HashTable  Map  Collections     Talentica  BlackRock


 Q3. isnt the use of HashTable and ConcurrentHashMap the same, i.e providing synchronized map collection ?Core Java2017-01-29 18:38:52

Ans. Yes, they both aim at providing synchronized access to the Map collection. The only difference is in their implementation. ConcurrentHashMap came after HashTable and hence technically more efficient as it doesn't lock the complete map while accessing it.

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   Like      Discuss      Correct / Improve     HashTable  ConcurrentHashMap  map  Collections


 Q4. If a Map needs to be accessed simultaneously by multiple threads, which collection class should be used ? Core Java2017-08-17 11:01:07

Ans. ConcurrentHashMap

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   Like      Discuss      Correct / Improve     map  concurrenthashmap  multithreading


 Q5. Isnt the use of HashTable and ConcurrentHashMap the same, i.e providing synchronized map collection ?Core Java2018-08-30 08:37:45

 This question was recently asked at 'Tata Consultancy'.This question is still unanswered. Can you please provide an answer.


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   Like      Discuss      Correct / Improve     synchronized collections  hashtable  ConcurrentHashMap     Tata Consultancy


 Q6. How many read and write operations are provided at the same time by ConcurrentHashMaps ?Core Java2018-11-14 12:49:48

Ans. ConcurrentHashMaps provide unlimited read operation fro multi threaded environment. For write operation only one thread can change value for particular segment of map.

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   Like      Discuss      Correct / Improve     ConcurrentHashMap     Synechron


 Q7. Is ConcurrentHashMap synchronized ?Core Java2019-02-05 10:40:27

Ans. Yes, ConcurrentHashMap is synchronized.

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   Like      Discuss      Correct / Improve     ConcurrentHashMap




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