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

Find the value of a specified element of the array arr[i] where 0 <= i <= n-1

Amazon,

982

Convert Binary tree to linked list.

Amazon,

1093

Convert a BST into a DLL and DLL to BST in place.

Amazon,

1116

worst case complexities of Quick sort and Merge sort.

Amazon,

1032

What do you mean by hashing?

Amazon,

1108

What is the definition of tree ?

Amazon,

1038

When can you say a graph to be a tree?

Amazon,

1083

What do you mean by constant time complexity?

Amazon,

1247

Write a program to show whether a graph is a tree or not using adjacency matrix.

Amazon,

1096

You're given a Boolean 2D matrix, can you find the number of islands?

Amazon,

1108

What steps are taken when the OS shifts from one-thread execution to another?

Amazon,

1366

What are the differences between graph and tree?

Amazon,

1122

Differentiate between overriding and overloading cases?

Amdocs,

1106

Differentiate between run time error and syntax error.

Amdocs,

1132

Discuss 2D arrays.

Amdocs,

1048

Un-Answered Questions { Java J2EE }

Which one of the following suits the description of a string better: derived or primitive?

952

What do you mean by ejb?

995

Is spring aop used?

411

What is the role of session interface in hibernate?

438

How is a structure different from array ?

1045

Should database connections be singleton?

961

Explain what pure virtual function is?

1022

What does application client module contain?

1005

What is the effective way to make sure all the servlets are accessible only when user has a valid session?

1062

What is JDBC Savepoint? How to use it?

1221

What is meant by singleton class?

1033

If I wanted to use a solarisui for just a jtabbedpane, and the metal ui for everything else, how would I do that?

1067

Why is static used?

1026

Why do we use hibernate framework?

354

What is comment?

922

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