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,

1038

Convert Binary tree to linked list.

Amazon,

1149

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

Amazon,

1160

worst case complexities of Quick sort and Merge sort.

Amazon,

1092

What do you mean by hashing?

Amazon,

1170

What is the definition of tree ?

Amazon,

1134

When can you say a graph to be a tree?

Amazon,

1139

What do you mean by constant time complexity?

Amazon,

1353

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

Amazon,

1154

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

Amazon,

1154

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

Amazon,

1427

What are the differences between graph and tree?

Amazon,

1165

Differentiate between overriding and overloading cases?

Amdocs,

1178

Differentiate between run time error and syntax error.

Amdocs,

1206

Discuss 2D arrays.

Amdocs,

1115

Un-Answered Questions { Java J2EE }

Explain how Application server handles the JMS Connection?

900

What is default switch case? Give example.

1066

Does list maintain insertion order java?

971

Can we make constructors static?

1293

What must be implemented by all servlets?

1164

What is the standard way to create threads, do initialization, etc. Within the application server? : BEA Weblogic

1075

How can you traverse a linked list in java?

1192

What do you mean by java swing?

1013

How does spring singleton work?

458

What is pointcut?

481

What are the different modules in spring?

619

What is front controller in spring?

489

Is spring and spring boot same? : Spring Boot

476

What are class paths? How can they be set?

1129

How do I print a “?

1059

For More Un-Answered { Java J2EE } Questions Click Here