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

Core Java (6529)
Advanced Java (552)
Swing (223)
EJB (402)

Servlets (804)
Struts (701)
JDBC (771)
JMS (324)

SunOne (10)
J2EE (485)
Weblogic (694)
Websphere (573)

Java J2EE Interview Questions

Questions Answers Views Company eMail

Convert a binary search tree to a sorted doubly linked list inplace.

Amazon,

1 9873

why there are multiple catches for a try block.don't tell me that there can be multiple exception of a code segment that's why.tell me the real fact behind this.

4 8696

Which are thin and thicK wrapper Class's in Java?

1 8434

Hi, This is ravi i have a question like this i have string "UNDERSTAND" now i want to count the letters how many times it occures.i.e from the above string the out put should be like this U-1,N-2,D-2,E-1,R-1,S-1,T-1,A-1. how can i achieve this Thnaks in advance for your response ..

7 8246

Why do inner class cannot have static declaration except static nested class?

TCS, Wipro,

2 12625

What is the basically use of finally while we know it is always executed but why?

Oracle, TCS,

5 9337

Why can't we make jsp as a controller and action servlet in struts?

TCS, Wipro,

8 12618

What is the difference between error and exception and explain in simple words not whatever is given in the book.

7 12893

What is the differnence between String Buffer and String builder despite having knowledge that String builder is faster than String Buffer and last one is threadsafe.please tell another important difference.

IBM,

3 8754

What is the servletcontext listener and what is JspContext and page context pls tell in simple words.

IBM,

1 6435

define System.out.println(); what is the meaning!

Accenture,

19 41053

what is domian and how can it work ?

HCL,

6 13532

What is trouble shoot in weblogic

HCL, IBM,

5 18088

whats string ?

HCL,

10 12163

After compilation of java program we'll get .class code. If it's generated in OS Windows XP will it work on OS Linux? If yes why? If no why?

Aricent,

5 9589

Un-Answered Questions { Java J2EE }

Can we have both constructor and setter injection?

579

What is replacefirst in java?

1108

What is the difference between object type and object name?

970

What is the role of web.xml in spring mvc and where is it located?

470

Is java a compiler?

978

What are the components in bean definition?

519

What is the difference between servlet and filter?

949

Is integer a class?

1077

Can you send an authentication error from a servlet?

973

What are hibernate annotations?

488

Which http method is said to be non-idempotent and idempotent?

1049

What is the use of string and stringbuffer?

981

Explain their methods? Tell me their parameter names also have you used threads in servlet?

1043

How do you create a reference in java?

979

Is java safe to download?

875

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