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 is the difference between iterator and enumeration ?

1005

Explain some best practices you would apply while using collection in java?

1034

What is the difference between hashmap and hashtable? What is an interface?

1165

What is starvation?

1320

From the two, which would be easier to write: synchronization code for ten threads or two threads?

1051

What is the difference between abstract classes and interfaces?

1023

What is the difference between dom and sax parser in java?

974

Describe what a thread-local variable is in java?

1012

What is busy spin, and why should you use it?

1085

What are the default and parameterized constructors?

1056

How do you take thread dump in java?

1003

Why java is not 100% object-oriented?

1 1505

What are the different ways of implementing thread? Which one is more advantageous?

984

What is the covariant return type?

1095

Explain a few methods of overloading best practices in java?

987

Un-Answered Questions { Java J2EE }

What is difference between string and stringbuffer?

1103

Explain about token feature in struts?

979

What do you understand by java?

987

Why is java more secure?

930

Why we are using dependency injection?

435

What is the file extension used for hibernate mapping file and hibernate configuration file?

466

What does this () mean in constructor chaining concept?

1125

In the servlets, we are having a web page that is invoking servlets ,username and password? which is checks in database? Suppose the second page also if we want to verify

1005

Can we create more than one object singleton class?

1036

What do you mean by compiler?

1042

What is com mysql jdbc driver?

924

what happens when a thread cannot acquire a lock on an object? : Java thread

1049

Explain how can you debug the Java code?

1069

How is forward action used for integration?

1017

What is supplier in java?

1002

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