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,

978

Convert Binary tree to linked list.

Amazon,

1084

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

Amazon,

1111

worst case complexities of Quick sort and Merge sort.

Amazon,

1019

What do you mean by hashing?

Amazon,

1100

What is the definition of tree ?

Amazon,

1031

When can you say a graph to be a tree?

Amazon,

1081

What do you mean by constant time complexity?

Amazon,

1226

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

Amazon,

1091

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

Amazon,

1093

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

Amazon,

1362

What are the differences between graph and tree?

Amazon,

1120

Differentiate between overriding and overloading cases?

Amdocs,

1101

Differentiate between run time error and syntax error.

Amdocs,

1119

Discuss 2D arrays.

Amdocs,

1042

Un-Answered Questions { Java J2EE }

What is ejb framework?

1078

What does exclamation mean in java?

1091

What is the difference between static and non-static with examples?

1933

Where is core java used?

1008

Give me example of derived data types.

1145

What is the list of pre-configured queues?

972

What is inversejoincolumns in hibernate?

495

Why tomcat is used in java?

889

What is a default method?

1044

What is the procedure for initializing a servlet?

1032

Explain how to improve Servlet Performance?

1136

what state does a thread enter when it terminates its processing? : Java thread

1047

Define jit compiler?

1130

Should I use orm or not?

451

What is servlet and its advantages?

1046

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