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Core Java - Interview Questions and Answers for 'Collection classes' - 5 question(s) found - Order By Newest

 Q1. What are Collection Classes ?Core Java2016-12-18 16:52:03

Ans. Collections in java is a framework of classes that provides an abstracted data structure to store and manipulate the group of objects. Each class is unique in the way it stores , search , sort and modify the elements.

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   Like         Discuss         Correct / Improve     collections  collection classes     Asked in 1 Companies      Basic        frequent


 Q2. Can we use primitive types with Collection classes ?Core Java2017-08-24 21:36:52

Ans. No, As collection classes involve use of Generics, they cannot accept primitive types.

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   Like         Discuss         Correct / Improve     collection classes  collections


 Q3. Why Concurrent Collection Classes are fail-fast in Java ?Core Java2018-07-20 18:02:59

 This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     concurrent collection classes   fail fast   fail-fast  collections  collection classes      expert


 Q4. difference between ArrayList and array ?Core Java2019-02-06 11:23:55

Ans. ArrayList is a variable length collection class whereas arrays are fixed length primitive structure.

We can use generics with arraylist but not with arrays.

We can store primitive data types within arrays but can't with ArrayList. In ArrayList that needs to be converted to Wrapper objects.


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   Like         Discuss         Correct / Improve     arraylist  arrays  collection classes  collections      basic        frequent


 Q5. What is the different between collection and Stream Api ?Core Java2020-01-30 09:23:49

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


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   Like         Discuss         Correct / Improve     collection classes  stream api  collection vs stream     Asked in 1 Companies



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