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

Can an unreferenced object be referenced again?

1206

Write a program in java to calculate the difference between the sum of the odd level and even level nodes of a binary tree.

1077

Can we declare an interface as final?

1080

How many types of constructors are used in java?

1206

What is the difference between compile-time polymorphism and runtime polymorphism?

1013

Can you use this() and super() both in a constructor?

996

What is an i/o filter?

5 1850

What is the difference between serializable and externalizable interface?

1120

Can we execute a program without main() method?

1053

What is the difference between static binding and dynamic binding?

1146

Can a class have an interface?

1006

Can we override the static methods?

1053

What do you understand by an io stream?

1060

What is the purpose of a default constructor?

1109

Can we override the overloaded method?

1166

Un-Answered Questions { Java J2EE }

What is ioc concept?

1220

How is string immutable in java?

1050

Why spring security is used?

415

Can you use abstract and final both with a method?

1123

Define how can we find the actual size of an object on the heap?

1223

What is the purpose of constant tag in struts.xml?

967

What are workflows?

835

What is ph and buffers?

1013

Why do I have to reaccess the database for Array, Blob, and Clob data?

1084

What is the map interface in java programming?

1026

What is string :: npos?

1105

How do you use compareto?

959

What is action servlet in struts?

983

What is an accessor?

1709

What is used of static keyword in java?

1092

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