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Java J2EE Interview Questions
Questions Answers Views Company eMail

what is BUSINESS DELIGATE PATTERN,DAO,VO,DTO?

BOB Technologies, TCS,

6 26989

without using arthematic operation ,how can you write the logic for adding/substraction/multiplication?

Tanla Solutions, Wipro,

7 11305

How to create an instance of a class if the class has private constructor?

 3 8465

what is an ejb object?

Bally Technologies, HCL, Siemens,

5 18434

Driver manager is a class/interface.

Bally Technologies, College School Exams Tests, TCS,

5 17768

How to create an instance of a class without using "new" operator? Plz help me out properly.Thank u.

CSC,

10 25610

give me a java code snippet to connect Microsoft excel through.... I am trying alot... plz help me.

 7 15946

how u do unit testing?

iFlex,

2 4981

How u dubugg ur project?

iFlex,

1 5604

what is the difference between?when we write the code in following manner? class One extends httpservlet { } and class One extends genericservlet { }

 4 6243

how can u integrate ejb and hibernate? How can u call hibernateDAO methods in session bean?

Infosys,

2 10569

Hi guys.. Well can u tell me that why there is need of "init()" , i mean why can not we initialize the servlet object with the help of constructors? Thank you.

7 7537

who was the founder of java

CTS, HCL, ProKarma,

32 47719

AS a developer will u create a data source in connection pool? If so how will u do that, how to access the object from connection pool using IRAD tool?

 1659

when connecting with the database,if database server is down,ho can we handle this exception in struts,how can we send error message to the user?

Wipro,

4 9665

Un-Answered Questions { Java J2EE }

What is difference between jms and activemq?

496

What are the four components of j2ee application?

572

What are the loop holes of struts?

575

Can we overload destructor in java?

551

What 5 doubled?

522




Mention some of the databases that hibernate supports?

185

Is constructor inherited?

544

Explain covariant method overriding in java.

557

Which is better spring jpa or hibernate?

156

What are the different types of caches in hibernate?

154

Why hashmap is used in java?

566

What are the four versions of java?

574

What is a superclass?

941

Does sql allow null values ? Can we use it within where clause ?

524

What are the different types of spring?

160

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