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 4996

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

2 11105

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 8915

What is the difference between Synchronizing mehtod & Synchronizing block?

2 5991

what is check p object in java

TCS,

1 4249

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

5 20730

What Is Pointer?

4 5560

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

3 5215

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

2 4945

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

2 5997

In how many ways we can the thread? in java

3 9313

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

2 5270

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

12 17116

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 6081

what is the replacement method of stop() of thread

IBM, TCS,

8 12225

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Un-Answered Questions { Core Java }

What are the supported platforms by java programming language?

1011

What access modifiers can be used for class ?

979

Why string is immutable with example?

917

What do you mean by checked exceptions?

909

What is difference between class and object in java?

1028

What are different types of expressions?

1063

A non-static inner class may have object instances that are associated with instances of the class’s outer class. A static inner class does not have any object instances.

970

What is charat ()?

897

Can a class have multiple subclasses?

1060

Explain the difference between jvm and jre?

991

What is executor memory?

902

What's the difference between an abstract class and interface in java?

990

What are the methods available in a class?

1023

Why do we use predicate in java?

1010

Does java allow default arguments?

957

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