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Interview Questions and Answers for 'VirtusaPolaris' - 3 question(s) found - Order By Newest

 Q1. Which of the following combination of keywords is illegal in Java ?

a. static and transient
b. transient and final
c. static and synchronized
d. abstract and final
Core Java
Anonymous
Ans. abstract and final

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   Like      Discuss      Correct / Improve     java   java keywords     VirtusaPolaris  IVTL InfoView Technologies      basic


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  What is "super" used for ?
  What is "this" keyword used for ?
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 Q2. What is Generalization and Specialization in terms of casting ?Core Java
Admin
info@buggybread.com
Ans. Generalization or UpCasting is a phenomenon where a sub class is prompted to a super class, and hence becomes more general. Generalization needs widening or up-casting. Specialization or DownCasting is a phenomenon where a super class is narrowed down to a sub class. Specialization needs narrowing or down-casting.

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   Like      Discuss      Correct / Improve     java   data types   casting   up casting   downcasting   generalization   specialization     Tata Consultancy (TCS)  VirtusaPolaris


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 Q3. Why can't we declare a class abstract as well as final ?Core Java

Ans. Abstract means that the class is only meant to be subclassed whereas final means that it cannot be subclassed so both concepts - abstract and final are actually mutually exclusive and hence not permitted together.

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   Like      Discuss      Correct / Improve     abstract   final   java keywords     VirtusaPolaris


Related Questions

  Which of the following combination of keywords is illegal in Java ?

a. static and transient
b. transient and final
c. static and synchronized
d. abstract and final
  How does volatile affect code optimization by compiler?
  Can we access instance variables within static methods ?
  What is Volatile keyword used for ?
  What is the use of Transient Keyword ?
  What is a Final Method ?
  Can we override static methods ? Why ?
  What is "super" used for ?
  What is "this" keyword used for ?
  Which of the following keyword is not permitted for outer class ?




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