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Digest #2052

Top 50 Core java Interview Questions with Answers by "Meghana" a.maheshi

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1 Top 50 Core java Interview Questions with Answers

Thu Mar 31, 2016 8:45 pm (PDT) . Posted by:

"Meghana" a.maheshi

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| CORE JAVA INTERVIEW QUESTIONS |
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| Core Java Interview Questions |
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- What is Encapsulation?
http://www.coolinterview.com/interview/26864/

- Why would you use a synchronized block vs. synchronized method?
http://www.coolinterview.com/interview/18024/

- What does it mean that a method or field is "static"?
http://www.coolinterview.com/interview/17992/

- What do you understand by Synchronization?
http://www.coolinterview.com/interview/17996/

- What is the difference between throw and throws?
http://www.coolinterview.com/interview/18013/

- What modifiers are allowed for methods in an Interface?
http://www.coolinterview.com/interview/17991/

- Why operator overloading is not there in java?
http://www.coolinterview.com/interview/17990/

- What is similarities between an Abstract class and Interface?
http://www.coolinterview.com/interview/17999/

- What are wrapped classes?
http://www.coolinterview.com/interview/17993/

- How can you force garbage collection?
http://www.coolinterview.com/interview/18027/

- What is a local, member and a class variable?
http://www.coolinterview.com/interview/17987/

- What is static block?
http://www.coolinterview.com/interview/26903/

- Can there be an abstract class with no abstract methods in it?
http://www.coolinterview.com/interview/26891/

- What is final modifier?
http://www.coolinterview.com/interview/26901/

- What is a local, member and a class variable?
http://www.coolinterview.com/interview/17994/

- Explain the different forms of Polymorphism.
http://www.coolinterview.com/interview/18009/

- What is difference between an Abstract class and Interface?
http://www.coolinterview.com/interview/18000/

- What if there is a break or return statement in try block followed by finally block?
http://www.coolinterview.com/interview/26917/

- What is runtime polymorphism or dynamic method dispatch?
http://www.coolinterview.com/interview/26870/

- Can we instantiate an interface?
http://www.coolinterview.com/interview/26881/

- Explain garbage collection?
http://www.coolinterview.com/interview/18004/

- How does Java implement polymorphism?
http://www.coolinterview.com/interview/26868/

- What modifiers are allowed for methods in an Interface?

http://www.coolinterview.com/interview/17988/

- What do u mean contructor in java ?
http://www.coolinterview.com/interview/18020/

- What are the different ways to handle exceptions?
http://www.coolinterview.com/interview/26921/

- What is the difference between abstraction and encapsulation?
http://www.coolinterview.com/interview/26865/

- Explain the Encapsulation principle.
http://www.coolinterview.com/interview/18006/

- What are Access Specifiers available in Java?
http://www.coolinterview.com/interview/26900/

- When you declare a method as abstract, can other nonabstract methods access it?
http://www.coolinterview.com/interview/26890/

- What is the use of finally block?
http://www.coolinterview.com/interview/26916/

- How do you prevent a method from being overridden?
http://www.coolinterview.com/interview/26879/

- What is a marker interface?
http://www.coolinterview.com/interview/26885/

- Can overloaded methods be override too?
http://www.coolinterview.com/interview/26875/

- What is transient variable?
http://www.coolinterview.com/interview/17995/

- How to define an Interface?
http://www.coolinterview.com/interview/18002/

- what is main purpose of interface?
http://www.coolinterview.com/interview/18016/

- Explain the different forms of Polymorphism.
http://www.coolinterview.com/interview/26869/

- What are Access Specifiers available in Java?
http://www.coolinterview.com/interview/18010/

- Describe the wrapper classes in Java.
http://www.coolinterview.com/interview/18011/

- What is an abstract class?
http://www.coolinterview.com/interview/26886/

- What are the uses of final method?
http://www.coolinterview.com/interview/26902/

- Why Errors are Not Checked?
http://www.coolinterview.com/interview/26913/

- What is Collection API?
http://www.coolinterview.com/interview/17998/

- Explain the user defined Exceptions?
http://www.coolinterview.com/interview/18003/

- Describe the principles of OOPS.
http://www.coolinterview.com/interview/18005/

- what is the class variables ?
http://www.coolinterview.com/interview/18012/

- What do u mean by "method" in java ?
http://www.coolinterview.com/interview/18019/

- how many ways to create Thread and which one is good? runnable interface or Thread class?
http://www.coolinterview.com/interview/18021/

- What is Dynamic Binding?
http://www.coolinterview.com/interview/26871/

- Can we create an object for an interface?
http://www.coolinterview.com/interview/26882/

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