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

Core Java Interview Questions

Questions Answers Views Company eMail

How to invoke external process in java.

1093

How the interruptible method gets implemented?

991

What is the use of runnable interface?

1188

What is an immutable class?

1164

Can you explain inner class.

1106

What is the requirement of thread in java?

1069

Explain the difference between association, aggregation and inheritance relationships.

1102

Difference between java and javascript

1109

Difference between vector and arraylist.

1132

Difference between linkedlist and arraylist.

1085

What are the kinds of polymorphism?

1107

How will you load a specific locale?

993

Define a package.

1103

How to obtain a performance profile of java program

1046

State the difference between creating string as new () and literal.

1132

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Un-Answered Questions { Core Java }

What is a singleton class? Give a practical example of its usage.

1116

What is a marker interface?

1180

How do you declare an array that will hold more than 64KB of data?

1312

What is the implementation of destroy method in java. Is it native or java code?

982

What are the java ide’s?

1056

What are the characteristics of Final,Finally and Finalize keywords.

1192

Explain different ways of creating a thread?

1085

How many types of literals are there in JAVA?

1062

Can we have any code between try and catch blocks?

1004

Explain static nested classes ?

1132

Can a static class have a constructor?

1018

Why vector is used in java?

1041

Can we restart a thread already started in java?

1121

What is ph and buffers?

1013

Can we return null in java?

1169

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