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

Very Frequently asked. Have been asked in HCL Technologies very frequently ( based on 3 feedback ). Among first few questions in many interviews.
  Q1. Differences between abstract class and interface ?Core Java
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Ans. Abstract classes can have both abstract methods ( method declarations ) as well as concrete methods ( inherited to the derived classes ) whereas Interfaces can only have abstract methods ( method declarations ).

A class can extend single abstract class whereas it can implement multiple interfaces.

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   Like         Discuss         Correct / Improve     java   classes   abstract class   interfaces     Asked in 65 Companies      basic        frequent


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 Q2. In a file there are 1 million words . Find 10 most frequent words in that file.Design2017-10-21 08:25:11

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


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   Like         Discuss         Correct / Improve     file handling     Asked in 1 Companies


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