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| Interview Questions and Answers for 'Crossover for work' - 2 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 237 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 ? | |||||
 Very Frequently asked. Favorite question in walkins and telephonic interviews. Usually among first few questions. Asked in different variants. Must know for intermediate and expert professionals.Among Top 10 frequently asked questions. | |||||
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| Ans. A Class must override the hashCode method if its overriding the equals method. | |||||
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| Discuss Correct / Improve java collections hashcode hash code equals collections Asked in 44 Companies intermediate frequent | |||||
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| Related Questions | |||||
| Which String class does not override the equals() and hashCode() methods, inheriting them directly from class Object? | |||||
| Write a class and override the equals and hashcode method ? | |||||
| How many threads can access a concurrent hashmap when the hashcode is overridden and always returns a zero. | |||||
| What is the use of defining equals , compareTo and hashcode methods in a class ? Where are they used ? | |||||
