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Most important 50 Core Java Interview Questions by "Pooja" dial2pooja

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1 Most important 50 Core Java Interview Questions

Mon Jul 28, 2014 12:01 am (PDT) . Posted by:

"Pooja" dial2pooja

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CORE JAVA INTERVIEW QUESTIONS

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Core Java Interview Questions
* What are the advantages of using exception handling?
http://www.coolinterview.com/interview/26911/

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

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

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

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

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

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

* What is method overloading?
http://www.coolinterview.com/interview/26872/

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

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

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

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

* What is Encapsulation?
http://www.coolinterview.com/interview/26864/

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

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

* What is Constructor?
http://www.coolinterview.com/interview/26892/

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

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

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

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

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

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

* How does the Java default constructor be provided?
http://www.coolinterview.com/interview/26893/

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

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

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

* What are the principle concepts of OOPS?
http://www.coolinterview.com/interview/26862/

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

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

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

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

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

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

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

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

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

* What is the difference between static and non-static variables?
http://www.coolinterview.com/interview/26905/

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

* Why Runtime Exceptions are Not Checked?
http://www.coolinterview.com/interview/26914/

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

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

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

* how many ways to create Thread and which one is good? runnable interface or Thread class?

http://www.coolinterview.com/interview/18021/

* How to invoke a superclass version of an Overridden method?
http://www.coolinterview.com/interview/26877/

* Explain the usage of the keyword transient?
http://www.coolinterview.com/interview/18026/

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

* Is it possible to override the main method?

http://www.coolinterview.com/interview/26876/

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

* Which is superclass of Exception?
http://www.coolinterview.com/interview/26910/

* What are the differences between method overloading and method overriding?
http://www.coolinterview.com/interview/26874/