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| Core java - Interview Questions and Answers for 'Ciber' - 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. | |||||
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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. | |||||
| Help us improve. Please let us know the company, where you were asked this question : | |||||
 Discuss Correct / Improve  java classes abstract class interfaces  Asked in 80 Companies  basic  frequent | |||||
 Related Questions | |||||
 What are the different uses of Interfaces in Java ? | |||||
| Why can't we have diamond problem with interfaces ? | |||||
| What is the difference between List, Set and Map ? or What are the different Java Collections Interfaces ? | |||||
| What are Marker Interfaces ? Name few Java marker interfaces ? | |||||
| Why do we need Thread class even in case we execute thread using runnable interface ? | |||||
| Which of the following doesn't extend Collection interface ? | |||||
| 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 ? | |||||
| Frequently asked at HCL Technologies ( Based on 3 feedback ) | |||||
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| Ans. Checked exceptions are the exceptions for which compiler throws an errors if they are not checked whereas unchecked exceptions are caught during run time only and hence can't be checked. | |||||
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| Discuss Correct / Improve java exceptions checked exceptions unchecked exceptions exception handling basic interview question Asked in 37 Companies basic frequent | |||||
 Try 1 Question(s) Test | |||||
| Related Questions | |||||
| Checked exception needs to be ... | |||||
| Give an Example of checked and unchecked exception ? | |||||
