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| Core Java - Interview Questions and Answers for 'Java concepts' - 4 question(s) found - Order By Newest | ||||
 Frequently asked to fresh graduates and less experienced developers. Among the first few questions in many interviews. | ||||
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| Ans. Composition - has-a relationship between objects. Inheritance - is-a relationship between classes. Composition - Composing object holds a reference to composed objects and hence relationship is loosely bound. Inheritance - Derived object carries the base class definition in itself and hence its tightly bound. Composition - Used in Dependency Injection Inheritance - Used in Runtime Polymorphism Composition - Single class objects can be composed within multiple classes. Inheritance - Single class can only inherit 1 Class. Composition - Its the relationship between objects. Inheritance - Its the relationship between classes. | ||||
 Sample Code for inheritance Sample Code for composition | ||||
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 Discuss Correct / Improve  java java concepts inheritance object oriented programming (oops) oops concepts composition object oriented programming (oops) oops concepts inheritance object oriented programming (oops) inheritance vs composition object oriented programming (oops) oops concepts  Asked in 29 Companies  basic  frequent | ||||
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| Ans. Encapsulation | ||||
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| Discuss Correct / Improve java java concepts java features oops concepts oops features access protection information hiding | ||||
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| Ans. Inheritance | ||||
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| Discuss Correct / Improve java java concepts java features code reusability | ||||
| Must know at all levels. Among Top 10 frequently asked questions in Java. Very frequently asked to fresh graduates or less experienced professionals. | ||||
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| Ans. Its a facility for code reuse and independent extension wherein a derived class inherits the properties of parent class. | ||||
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| Discuss Correct / Improve inheritance object oriented programming (oops) oops concepts oops concepts java concepts code reuse code re-use classes derived classes Asked in 14 Companies basic frequent | ||||
Which of the following Java feature promotes access protection or Hiding ?
