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

Core Java Interview Questions

Questions Answers Views Company eMail

why the constructor should be used in class,if there is no constructor what will happen?

4 7784

explain the clone method and clonable interface

1 7584

what are depricated methods in threads and explain the lifecycle methods

CTS,

5 12811

explain the classification of exception and hoew to handle the exceptions

2 10031

what is java

10 11468

what is Assertion?

Wipro,

4 15124

When does the compiler supply a default constructor for a class?

TCS,

9 18319

Which Math method is used to calculate the absolute value of a number?

Accenture,

3 9953

How does serialization work

Ordain Solutions,

3 11093

To what value is a variable of the Boolean type automatically initialized?

3 8521

What is the exact difference in between Unicast and Multicast object ?

Accenture,

4 26895

What is the difference between Stream Reader and Stream Writer?

4 17496

Which class should you use to obtain design information about an object

2 8352

Why we need to serialize the object

CTS, Geometric Software,

11 39860

can we have virtual functions in java?

Wipro,

11 47331

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Un-Answered Questions { Core Java }

Suppose if we have variable ' I ' in run method, if I can create one or more thread each thread will occupy a separate copy or same variable will be shared?

1055

Why do we use string?

1043

Does anyone still use java?

1115

What is parse method?

1018

Why vector class is used?

992

What is the static block?

1067

Write a program to print fibonacci series up to count 10.

902

How do you clear an arraylist in java?

985

Can we assign integer value to char in java?

1033

Can a hashset contain duplicates java?

979

What is starvation?

1321

What is the meaning of course?

1100

Given a singly linked list, determine whether it contains a loop or not without using temporary space?

988

What is a default method?

1051

What is the difference between import java.util.date and java .util?

1052

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