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 5137

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

2 11318

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 9248

What is the difference between Synchronizing mehtod & Synchronizing block?

2 6285

what is check p object in java

TCS,

1 4504

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

5 21156

What Is Pointer?

4 5919

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

3 5452

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

2 5122

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

2 6213

In how many ways we can the thread? in java

3 9592

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

2 5480

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

12 18032

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 6390

what is the replacement method of stop() of thread

IBM, TCS,

8 12725

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Un-Answered Questions { Core Java }

What is a method in coding?

1100

How can you avoid serialization in child class if the base class is implementing the serializable interface?

1132

How many bits is a word?

1062

What is the purpose of an interface?

1097

can rmi and corba based applications interact ?

1125

What is the difference between hashmap and hashtable in java?

1176

In a class implementing an interface, can we change the value of any variable defined in the interface?

1145

What's a method in programming?

1158

What are the benefits of operations?

993

What was java originally called?

1006

How do you convert string to int in java?

1145

How do you declare an array that will hold more than 64KB of data?

1388

What is the transient keyword?

2352

Can we have more than one package statement in source file ?

1097

Why do we use threads in java?

1177

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