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 garbage collection in Java, and how can it be used ?

Accenture, HCL, Infosys, Sara, SITS, TCS, Wipro,

32 79827

Differentiate Vector and ArrayList?

Max Telecom, Wipro,

6 15578

Differentiate constructor and a method and how are it be used?

Wipro,

7 16250

What is an abstract class?

DBS, Wipro,

8 14802

How can final class be used?

Accenture, Wipro,

5 14894

By what default value is an object reference declared as an instance variable?

Wipro,

1 14174

Java support what type of parameter passing ?

Wipro,

7 19039

Explain the term serialization?

Wipro,

10 17848

Is there is any error if you have multiple main methods in the same class?

Infosys, Wipro,

10 19816

What is Overriding and how can it be used?

Consagous, Wipro,

7 20182

How is serialization used generally ?

3 8895

How are Swing and AWT be differentiated?

Wipro,

3 9604

Explain pass by reference and pass by value?

IBM, Wipro,

8 19174

In which way does a Primitive data type is passed ?

Sun Microsystems,

5 12911

What happens when a main method is declared as private?

DELL, Infosys, L&T, Sun Microsystems,

22 59128

Un-Answered Questions { Java J2EE }

What are the different mode that servlets can be used?

809

What are all the protocols supported by httpservlet?

955

What is @entity in spring boot? : Spring Boot

286

What are different types of calculation usages used in wcs?

729

Is spring boot a mvc? : Spring Boot

310

Is spring boot a framework?

237

How transient variable is different from volatile variable?

833

What is the use of using enum to declare a constant?

828

What about plug-in?

682

What is difference between local variable and global variable?

772

What does entitymanager merge do?

275

How to prevent dirty checking in hibernate?

300

What is hibernate and its advantages?

249

What is difference between oauth and oauth2?

301

Difference between hibernate session merge() vs update()?

305

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