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Design - Interview Questions and Answers for 'Ibm' - 3 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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 Q2. What are different types of dependency injections ?Design 2017-11-07 09:37:47

Ans. Setter injection
Constructor injection
Interface injection
Look-up method/method injection

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   Like      Discuss      Correct / Improve     dependency injection   design patterns     IBM


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Frequently asked Design Pattern interview question.
 Q3. What is a prototype design pattern ?Design2016-11-04 08:06:01

Ans. The prototype pattern is a creational design pattern. It is used when the type of objects to create is determined by a prototypical instance, which is cloned to produce new objects. Prototype is used when we need duplicate copies of objects.

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