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

How we can know whether proxy server up or not?

TCS,

3 9540

we cannot create an object of interface but we can create a variable of it

1 5544

There are three interfaces A,B & C. A extends B, B extends C, and C extends A.Is it multiple Inheritance? please anybody help me.....

5 10667

How many Action classes have been used in your project? Differences between struts 1.1 and 1.3?

Oracle,

2964

What is the Spring2.5 MVC Navigation flow?

IBM,

1 6401

abstract class A{ int list []=new int [100]; A(int x,int y){ rondom n=new rondom(); for (int i==;i<100;i++); list [i]=x+r.next int(y-x+1); abstract sort (); abstract binary sarch(int temp); class B extends A{

3 5170

Use of private variable while creating properties ???

1 3941

Which one should we prefer while using bean ? managed bean annotation or faces-config

1 3579

Since we can create managed bean by two ways as, we can define the bean name in faces-config.xml file so that page can use that OR we can write annotation on bean class so that it is automatically assign to page but I want to know which one is good programming practice ? And also mention disadvantage of other which should not prefer ... Thanking you...

ASD Lab,

2274

I am newbie in J2EE & looking for strong basic behind each concept as, Why do we use private access specifier before each variable of type property bcoz ultimately to access it outside the class we use public method as getter & setter ? If we use getter & setter to access it outside the class so better we make variable as public so that it is easily available outside of the class... Please guide me why do we use as private ????

CTS,

3 6093

Can we override the main method?

4 7579

make a method which any number and any type of argument and print sum of that arguments.....

1809

can write code for serialization ?

HCL, MegaSoft,

1 4127

Difference between ActionErrors and ActionMessage?

iGate,

1 7331

how many methods are there in RequestPrccesor class?

Infosys,

2 8311

Un-Answered Questions { Java J2EE }

What is url encoding and url decoding

1150

How does spring singleton work?

400

What is jdbctemplate in spring? And how to use it?

407

Explain the difference between association, aggregation and inheritance relationships.

1086

How objects of a class are created if no constructor is defined in the class?

1066

What is collections framework?

1142

What is front controller in spring mvc?

416

What are the technologies that are supported by hibernate?

477

what is a cell in websphere?

901

What is the RMI and Socket?

1057

What are important spring projects?

421

What is SQL Warning? How to retrieve SQL warnings in the JDBC program?

1043

What is an event in Swing?

1061

Is sessionfactory a thread-safe object?

315

what is the purpose of the wait(), notify(), and notifyall() methods? : Java thread

988

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