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 4286

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

2 10253

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 7753

What is the difference between Synchronizing mehtod & Synchronizing block?

2 5069

what is check p object in java

TCS,

1 3560

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

5 19213

What Is Pointer?

4 4371

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

3 4284

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

2 4140

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

2 5168

In how many ways we can the thread? in java

3 8392

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

2 4456

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

12 13928

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 4962

what is the replacement method of stop() of thread

IBM, TCS,

8 10200

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Un-Answered Questions { Core Java }

Difference between static and dynamic class loading.

591

Is there any limitation of using inheritance?

571

Can we have multiple public classes in a java source file?

560

What is difference between checked and unchecked exception in java?

584

Is java a digit method?

520

What is the difference between method overriding and overloading?

586

What is difference between hashset and hashmap in java?

468

Explain JMS in detail.

620

What is the use of jtable?

652

What are keywords and reserved words in java?

563

Is sizeof a preprocessor?

546

Difference between ‘>>’ and ‘>>>’ operators in java?

643

Explain about interrupt() method of thread class ?

666

What is unsigned char?

629

What is native method in java?

571

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