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 6138

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 20961

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 5025

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

2 6111

In how many ways we can the thread? in java

3 9457

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

2 5404

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

12 17572

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 6244

what is the replacement method of stop() of thread

IBM, TCS,

8 12502

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Un-Answered Questions { Core Java }

What is java Applet?

1104

Why is boolean important?

1063

What is a predicate method?

1017

Why parameters should be passed by reference?

972

Explain about serializable interface in java?

999

What is private static in java?

1041

Can we use synchronized block for primitives?

1073

Is java good for beginners?

1012

Explain about join() method?

968

Explain the difference between throw and throws in java?

1002

What do you mean by collectors in java 8?

935

What is the use of runnable interface?

1175

What is the difference between normal report & matrix report?

1110

how to open and edit XML file in Weblogic???

1971

What is meant by call by reference?

1009

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