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 5142

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

2 11322

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 9252

What is the difference between Synchronizing mehtod & Synchronizing block?

2 6292

what is check p object in java

TCS,

1 4507

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

5 21161

What Is Pointer?

4 5921

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

3 5463

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

2 5130

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

2 6216

In how many ways we can the thread? in java

3 9593

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

2 5490

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

12 18062

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 6396

what is the replacement method of stop() of thread

IBM, TCS,

8 12738

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Un-Answered Questions { Core Java }

What is java regex?

1062

How to print nodes of a Binary tree?

2310

Is array serializable java?

1049

Why is java multithreaded?

1047

Which is faster string or stringbuilder?

995

What are the advantages of unicode?

1060

What are keyboard events?

1212

What is the use of optional ?

1092

Explain how to force the garbage collection in java.

1029

What is ph and buffers?

1051

What does a boolean method return?

1307

How does a for loop work java?

1100

Is it possible for yielded thread to get chance for its execution again ?

1087

Is final static java?

1075

Does variable declaration allocate memory?

1093

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