Core Java Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Core Java Interview Questions

Questions Answers Views Company eMail

What is an object’s lock and which object’s have locks?

1017

What will be the output of round(3.7) and ceil(3.7)?

1168

How do you decide when to use arraylist and linkedlist?

1051

Which object oriented concept is achieved by using overloading and overriding?

1195

What are the advantages of arraylist over arrays?

1158

Which class represents the socket that both the client and server use to communicate with each other?

1094

What is the difference between yielding and sleeping?

1184

What are the access modifiers in java?

1100

Break statement can be used as labels in java?

1066

What are encapsulation, inheritance and polymorphism?

1059

I want my class to be developed in such a way that no other class (even derived class) can create its objects. Define how can I do so?

1229

Difference between static and dynamic class loading.

1188

How can we find the actual size of an object on the heap?

1362

Does java allow default arguments?

1060

Define how does a try statement determine which catch clause should be used to handle an exception?

1265

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Un-Answered Questions { Core Java }

What is a line separator in java?

1035

What is function and method in java?

1000

What are different types of multitasking?

1012

Explain about complier design(phases)

1141

Can list be null in java?

1104

Why do we use threads in java?

1179

Explain why wait(), notify() and notifyall() methods are in object class rather than in thread class?

1068

Can a singleton class be inherited?

1018

What does the string method compareto () do?

1118

Can a static method be final?

1114

Is it possible to cast an int value into a byte variable? What would happen if the value of int is larger than byte?

1011

What is string and example?

1106

What is class level lock ?

1085

What is illegal identifier in java?

1077

How to do encapsulation in java?

1109

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