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 benefit of using enum to declare a constant?

Aspire, Infogain,

1104

Define "Access specifiers" in java.

HCL,

1173

What are the different approaches to implement a function to generate a random number?

Axtria, ITC Indian Tobacco Company,

1060

What are abstract classes and anonymous classes?

Flextronics, Thomson Reuters, Virtusa,

1075

Explain the differences between static and dynamic variables?

Fidelity,

1150

How would you dynamically allocate memory to an array?

Atos Origin,

1040

What is the difference between Array and Hash Table?

Impetus,

1032

What are heap memory and stack memory and what are memory tables.

Aspiring Minds,

990

What are the concepts of 'OOPS'?

Atos Origin,

1075

What is nested loop? What is dangling else condition in it?

Ericsson,

1090

What will happen when using pass by reference in java?

HCL,

992

What is a concrete classes? Is Java object class is concrete class?

Infosys,

984

Given a singly linked list, find the middle of the list in a single traversal without using temporary variable.

Fidelity,

1052

What is Gang of four design patterns

Infosys,

1054

Can a constructor be private and how are this() and super() method used with constructor?

Flextronics, Hexaware,

1005

Un-Answered Questions { Java J2EE }

What is the typical bean life cycle in spring bean factory container?

430

What is the difference between jboss and weblogic?

989

What are the differences between the servletconfig interface and the servletcontext interface?

1189

What is the use of join method?

1033

In how many ways, objects can be fetched from database in hibernate?

368

How you will analyse threads state using samurai tool?

1024

Explain about thread synchronization inside a monitor?

2547

Explain the locking system in jdbc & its types?

987

What is the use of string and stringbuffer?

985

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

1052

Can we override constructors in java?

1144

What is lazy loading and why is it used for?

413

Explain about fail fast iterators in java?

1060

Can you use javascript in servlets?

1088

What does the joint point denote?

515

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