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

Why transient variables wont participate in serialization?

2 6302

what is ststic with example

Wipro,

2046

what is purpose of collections.unmodified() method..?

Accenture,

1 11418

what is purpose of writting public static void main(Strind arg[]) in java..?

ITC Infotech,

4 7496

What is the code inside the public void actionPerformed(ActionEvent ae) override method in Applet [ Condition:- you have one TextField and One Button , you have to enter any color name inside the TextField, when you click on Button Your background will change according to your input color name]

IBM,

2 10939

how to identify duplicate values in arraylist

TCS,

2 5513

Different between Struts and Spring? or Why use Spring, if you are already using Struts?

HP,

3 6238

Does Java pass arguments by value or reference?

HeadStrong,

5 9495

Difference between JRE and JVM?

HeadStrong, Infotech,

3 7531

Will it be called overriding if I do not change the parameters or return type, instead throw a different exception in the method signature.

HeadStrong,

4 8180

How will the struts know which action class to call when you submit a form?

HeadStrong,

6 9459

If I define a method in JSP scriplet <%..%>, where will it go after translation into a servlet?

HeadStrong,

8 21416

Why use a datasource when you can directly specify a connection details? (in a J2EE application)

1 4275

Can we have more than one action servlet?

HP,

7 14312

what is the difference between through and throws?

HCL,

2 6878

Un-Answered Questions { Java J2EE }

In DAO we are writting sql queries , how it is possible with creating and closing database connections.

1930

What is @postconstruct in spring boot? : Spring Boot

446

What is difference between printf and scanf?

1156

Where is your web server hosted?

847

What does void * mean?

1035

Is it ok to add new sessions and subscribers to a queue or topic connection once it has been started? : BEA Weblogic

1137

Can you write a java class that could be used both as an applet as well as an application?

962

What is in hql?

439

What is meaning of cascade in hibernate?

363

What is double data type?

947

Can a class be protected in java?

970

What is the meaning of “dirty read” in the database?

1034

What is difference between save and persist in hibernate?

399

What are dom elements?

434

What is java ee server?

880

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