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| Core java - Interview Questions and Answers for 'Java r' - 3 question(s) found - Order By Newest | ||||
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| Ans. OOPs or Object Oriented Programming is a Programming model which is organized around Objects instead of processes. Instead of a process calling series of processes, this model stresses on communication between objects. Objects that all self sustained, provide security by encapsulating it's members and providing abstracted interfaces over the functions it performs. OOP's facilitate the following features 1. Inheritance for Code Reuse 2. Abstraction for modularity, maintenance and agility 3. Encapsulation for security and protection 4. Polymorphism for flexibility and interfacing | ||||
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 Discuss Correct / Improve  oops oops features  Asked in 260 Companies  basic  frequent | ||||
 Related Questions | ||||
 Can you give a real world example of Encapsulation and Abstraction ? | ||||
| Which of the following Java feature promotes access protection or Hiding ? a. Inheritance b. Encapsulation c. Abstraction d. Composition | ||||
| Define encapsulation in Java ? | ||||
| Give an example of how Object Oriented Programming Concepts can be implemented. | ||||
| Which of the OOP's features facilitate dependency injection ? | ||||
| Which of the OOP's feature - encapsulation or abstraction - is more important ? | ||||
| Which of the polymorphism type - static or runtime - is more important ? | ||||
| Which of the OOP's feature is most important ? | ||||
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| Ans. This is the exception that is thrown when we try to modify the non concurrent collection class while iterating through it. | ||||
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| Discuss Correct / Improve java collections concurrentmodificationexception exception concurrency Asked in 14 Companies intermediate | ||||
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| What is CopyOnWriteArrayList ? | ||||
| What are the advantages and disadvantages of CopyOnWriteArrayList ? | ||||
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| Ans. All Keywords , modifiers ( public , static , final etc ) as well as non modifier keywords ( for, if,switch etc ) are reserved words in java and hence cannot be used as identifiers. Along with keywords , there are few literals that have predefined meaning and hence cannot be used as identifiers, these are true , false and null. | ||||
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| Discuss Correct / Improve java keywords java reserved words | ||||
| 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? | ||||
| What is Volatile keyword used for ? | ||||
| Can we access instance variables within static methods ? | ||||
| 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 ? | ||||
