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| Interview Questions and Answers for 'Indium software' - 1 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. | |||||
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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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 Discuss Correct / Improve  java classes abstract class interfaces  Asked in 81 Companies  basic  frequent | |||||
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| If an Abstract class has only abstract methods, What's the difference between such a class and an interface ? | |||||
| What is an API ( Application Programming Interface ) ? | |||||
| Can we declare interface methods as private ? | |||||
