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 do you understand by abstract classes?

HCL,

1147

How do you implement tree mirroring in java?

EXL, HCL,

1139

Explain the key functions of data binding?

Akamai Technologies, Aspire, Impetus, Infogain, Tavant Technologies, Virtusa,

1075

What is Major and importance difference between for and foreach loop ?

Infosys,

1218

What is the use of generics? When was it added to the Java development Kit?

Impetus,

1075

Explain the difference between a Thread and a Process.

Ciena,

1056

How many JVMs can run on a single machine and what is the Just-In-Time(JIT) compiler?

Global Logic,

1110

Does java support multiple inheritance or not?

Hexaware,

1206

How can you read content from file in java?

HCL,

1066

What is run time allocation?

Fidelity,

1084

How can we avoid including a header more than once?

Fidelity,

1088

Define max and min heap, also the search time of heap.

GrapeCity,

1085

Where to store local variables?

Aspiring Minds,

1173

How do you declare an array that will hold more than 64KB of data?

Aspire, Infogain,

1400

What is the difference between member variables initialization and assignment in a constructor?

Hexaware, Virtusa,

1354

Un-Answered Questions { Java J2EE }

What is the purpose of @requiredstringvalidator?

1016

Can an interface extend a class?

1064

Can we convert list to set in java?

1059

How do you download stubs from Remote place?

1853

What are the concepts of 'OOPS'?

1126

What is the difference between servlet and filter?

1008

Can a class be private in java?

1054

What is the use of attribute in servlets?

1097

Which annotation is used to auto generate primary key?

655

What is difference between applicationcontext and beanfactory?

547

What do you mean by aspect?

466

What would you do when jvm is consuming 100% cpu & memory on a server?

1011

What is life cycle of an interceptor?

1131

How to deploy Jar, War files in J2EE?

2747

What are the benefits of using dependency injection?

477

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