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

Why do we use DAO?

Accenture, Tech Mahindra,

3 18716

what are upcasting and downcasting?

5 18353

what is the diff b/w arraylist and vector?

Code Genesis, Genesis, Sprintine Labs,

6 11650

PreparedStatement is a pre compiled statement but where it's pre compiled ?

4 12479

What is actual difference between statement,prepared statement and callable statement and when we have to use it? pls post a answer with code and clear explanation. thanks

2 14316

Write an algorithm program in java for the following question.. 1) S is a set of integers.X is an integer obtained by sum of two digits in S. Write logic for whether or not the X is from the S. The time of algorithm should not exceed o(n logn).

2143

Write an algorithm program in java for the following question.. In a VLSI design techniques,they used rectangles to design circuits. EVery rectangle is to be placed according to x,y coordinates. Check whether or not two rectangles overlap each other. Here overlapping of rectangles is acceptable, if 1) one rectangle intersect with other. 2) one rectangle fully covers other. The time of algorithm should not exceed o(n logn).

2714

can we access the super class method using subclass object?

4 8357

what is use of marker interface? give me good example?

2 6175

what is use of threads how many ways to create thread

iTrust, Verizon,

3 10723

is it possible to create single instance of java class per session in web application

4 11324

where exactly the servlets and jsp's are stored?

CG-VAK, JHJ, TCS,

6 14774

can we create a own jdbc driver? how can we create?

HCL,

1 5512

what are the drawbacks of JDBC? explain briefly?

5 41981

what is the difference between SENSITIVE and INSENSITIVE?

1 9144

Un-Answered Questions { Java J2EE }

Why should we use ejb?

927

What is the use of jdbc api?

975

Which design pattern is used in spring aop?

481

Can I use javascript to submit a form?

1143

Explain the difference between jsp and servlet?

1078

What are the advantages of spring framework?

503

Can I use the getattribute() and setattribute() methods of version 2.2 of the java servlet api to parse xml documents? : BEA Weblogic

984

What is a subsequence of a string?

1066

What is actionlistener in java swing?

1014

What is swing delegation event model in java?

1090

How do I set properties for a JDBC driver and where are the properties stored?

966

How does beanfactory work in spring?

377

What is java collection? : java collections

1114

In corba, which of the files generated by the idltojava compiler must be compiled before running the server application? : BEA Weblogic

1019

What are the steps that are followed when two computers connect through tcp?

990

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