Java J2EE Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

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JDBC (771)
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Java J2EE Interview Questions

Questions Answers Views Company eMail

What is unicode?

5 9775

What is operator?

3 6339

Difference between ligt weight and heavy weight?

5 27938

what is mutability?which one is mutable String or StringBuffer?and why?give examples of each which shows the mutability of each String or StringBuffer

IBM, Zenon,

4 26828

what is Thread?

6 7900

what is synchronization

3 5668

can we create a object in static block class A { static { A a=new A(); } }

Cap Gemini,

7 18261

How to add two numbers with out using Arithmetic , union operators in java....? But we can use bitwise operators... but how...?

CTS, Satyam,

4 12709

Can we access private data outside of the class directly in java programming language? Why There is no runtime checking in java, which leads to access the private data directly outside of a class?

Google,

5 11362

What is the need to implement Serializable interface (with no methods) for objects which are to be serialized ? We can write our own functionality which writes objects to streams then why we need to implement and tell JVM that which objects can be serialized.

iFlex, Sapient,

6 15899

why java not supproting multiple inheritance?

5 7975

what is the purpose of method overriding in java where v r completely re-defining a inherited method instead y can't v create a new method and define.If the question is very silly plz excuse me and do reply.Thank U!

emc2, Kumaran Systems,

7 29466

If a multi threaded Java program has started numerous number of threads, at any point in time how to know which thread is currently executing/running ?

Accenture, College School Exams Tests, iFlex, NIIT,

7 15859

Why const and goto are reserved keyword in java?

1 7567

Why Wait and notify are kept in Object class although they are used only with Thread Class

Global Logic, Saksoft,

2 10781

Un-Answered Questions { Java J2EE }

what is a thread pool in java and why is it used?

1003

What is the use of @bean annotation in spring?

399

What is the difference between txdatasource and datasource?

1121

What is an exception in java?

1111

What is "this" keyword in java? Explain

1098

What is thread stack size? What is the default thread stack size in windows?

997

os is developed in c no java is more secured then c na why dont the os developed is developed using java

4229

Garbage collection in java?

1016

How we create object in copy constructor?

1123

What is db persistence?

423

A user of a web application sees a jsessionid argument in the URL whenever a resource is accessed. What does this mean? a. The form must have the field jsessionid b. URL rewriting is used as the session method c. Cookies are used for managing sessions

2246

How to consume message from jms queue in soa 12c?

807

How does a for loop work java?

1035

Which jdbc drivers will run your program?

941

What is a bytes message?

855

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