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

What are temp tables ?

993

What is database deadlock ?

1214

What should be done for auto generating primary key id in a table ?

997

Can we have foreign key reference to a non primary key column ?

999

What's the benefit for specifying constraints like not null, primary key explicitly instead of specifying it against the column ?

984

If you are given a choice to implement the code to either insert a record or update if already exist, which approach will you follow ?

1023

What is database deadlock ? How can we avoid them?

1071

Describe the steps needed to execute a sql query using jdbc.

998

Which constraint cannot be specified as an explicit constraint and should be specified with the column only ?

955

What is jdbc? Describe the steps needed to execute a sql query using jdbc.

955

Does sql allow null values ?

985

Write an sql to find all records having all upper case alphanumeric characters in a field ?

966

What are the different class loaders used by jvm?

1120

Describe, in general, how java's garbage collector works?

1050

What is threadfactory?

1118

Un-Answered Questions { Java J2EE }

Can we have a method name same as class name in java?

1063

Why java is called not pure object oriented language?

1039

What is thread pool in java with example?

1024

Do you need an alignment after replacing struts?

960

Difference between save() and saveorupdate() method of hibernate?

456

How do you check whether the list is empty or not in java?

990

What is the way to rollback transaction if something goes wrong using hibernate api?

404

Is jdbc object oriented?

963

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Why can't we override private static methods?

985

What is the use of spring dao module?

463

What if I write static public void instead of public static void in java?

1107

Which are different kinds of source code?

1126

Why volatile is used in java?

1090

Explain the concept of ssi ?

1086

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