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 ArrayList class is not a synchronized class and why it is not a thread safe class? explain

1 5059

what is actual real time using of oops concepts in projects(Interface,polymorphism.abstraction.........)

2 11215

I have 2 objects inside one object(vector). how can i serialize one of them. I dont want to serialize the second one

ABC, L&T,

3 9061

What is the difference between Synchronizing mehtod & Synchronizing block?

2 6139

what is check p object in java

TCS,

1 4392

what is the need to set path in java? how many ways to set path in java? Explain breif?

5 20963

What Is Pointer?

4 5748

how to print the below in java?thanks in advance.... * * * * * * * *

3 5349

how to print the below in java? * * * * * * * * *

2 5026

difference between String a; and String a=new String();? y do v need to assign memory to the variable?

2 6112

In how many ways we can the thread? in java

3 9459

how to make a un-checked exception as a checked exception one.

2 5405

Why only one Class is public in one file? Explain in details. Thanks in Advance.

12 17576

Hi can u pls tell me what is the use of marker interface. Iknow what is marker interface but what ability will the object get by implementing this.

CGI,

3 6245

what is the replacement method of stop() of thread

IBM, TCS,

8 12504

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Un-Answered Questions { Core Java }

What are multiple inheritances?

1109

Describe 2 different ways to concatenate two strings.

1202

Is it necessary that each try block must be followed by a catch block?

1019

Is java 9 released?

1006

What is set and get methods in java?

977

How can we achieve thread safety in java?

1151

what is inner class in java?

1134

Can we have multiple classes in single file ?

1067

How many static init can you have?

1216

Explain jvm, jre, and jdk?

1017

Differentiate between array list and vector in java.

1114

How do I compare two strings in word in java?

991

what are the states associated in the thread? : Java thread

1049

What is an example of character?

1135

Do extraneous variables affect validity?

913

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