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Core Java - Interview Questions and Answers for 'Collection interface' - 6 question(s) found - Order By Rating

 Q1. Which is the root interface of Collection classes in Java ?Core Java2016-10-12 08:26:03

Ans. java.util.Collection

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   Like         Discuss         Correct / Improve     collection interface  collections


 Q2. Why Collection interface does not extend Cloneable interface ?Core Java2016-09-15 09:40:06

Ans. Here is the list of classes that implements Collections Interface - http://www.buggybread.com/2015/02/java-collections-classes-that-implement.html

Having Collection interface to extend Cloneable interface would mean necessarily implement clone method by all implementing classes. As not all collection classes allow duplicate elements, it makes no sense to clone elements for them.

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   Like         Discuss         Correct / Improve     cloneable  collections  collection interface  cloning


  Q3. what is the difference between collections class vs collections interface ?Core Java
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Ans. Collections class is a utility class having static methods for doing operations on objects of classes which implement the Collection interface. For example, Collections has methods for finding the max element in a Collection.

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   Like         Discuss         Correct / Improve     java   collections   collections class   collection interface   basic interview question     Asked in 6 Companies      basic        frequent

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 Q4. Name few interfaces that extends Collection Interface ?
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Ans. http://www.buggybread.com/2015/02/java-collections-interfaces-that.html

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   Like         Discuss         Correct / Improve     java   collections   collection interface


 Q5. Name few classes that implement Collection interface ?
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Ans. http://www.buggybread.com/2015/02/java-collections-classes-that-implement.html

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   Like         Discuss         Correct / Improve     java   collections   collection interface


 Q6. Which of the following doesn't extend Collection interface ?

a. Set
b. List
c. Map
d. Queue
Core Java
Anonymous
Ans. Map

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   Like         Discuss         Correct / Improve     java   collections   collection interface



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