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Core java - Interview Questions and Answers for 'Calypso technology' - 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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Like Discuss Correct / Improve  oops  oops features Asked in 260 Companies basic   frequent | ||||
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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. It in Java is used to indicate that a field should not be serialized. | ||||
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Like Discuss Correct / Improve  java   oops   serialization   transient   java keywords Asked in 39 Companies intermediate   frequent | ||||
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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 | ||||
Which keyword is used to provide explicit access of a code block to single thread ? a. Transient b. Final c. Explicit d. Synchronized | ||||
Can we declare static variables as transient ? | ||||
What are transient variables in java? | ||||
Which of the following is true ? | ||||
Variables of an interface are intrinsically ... a. transient b. final c. public d. static | ||||
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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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Like 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 ? | ||||