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 Byte Message ?

1 2643

What is the difference between Byte Message and Stream Message?

1 4409

Are you aware of any major JMS products available in the market?

1 2244

What are the different types of messages available in the JMS API?

1 2563

What are the different messaging paradigms JMS supports?

1 2657

What is the difference between topic and queue?

1 2360

How Does the JMS API Work with the J2EE Platform?

1 2301

What is the role of JMS in enterprise solution development?

1 2303

What is the use of Message object?

1 2258

What is the basic difference between Publish Subscribe model and P2P model?

1 2502

What is the use of BytesMessage?

1 2196

What is the use of StreamMessage?

1 2488

What is the use of TextMessage?

1 2188

Why do the JMS dbms_aqadm.add_subscriber and dbms_aqadm.remove_subscriber calls sometimes hang when there are concurrent enqueues or dequeues happening on the same queue to which these calls are issued?

1 2569

Why do the TopicSession.createDurableSubscriber and TopicSession.unubscribe calls raise JMSException with the message "ORA - 4020 - deadlock detected while trying to lock object"?

1 2228

Un-Answered Questions { Java J2EE }

In how many ways duplicate form submission can occurs?

1047

According to java operator precedence, which operator is considered to be with highest precedence?

1148

How many types of classes are there in java?

1131

When should I use a singleton?

1106

What one should take care of, while serializing the object?

969

What do you mean by tiles in struts?

1085

What is the default value of an object reference declared as an instance variable?

1189

What is the java reflection api? Why it’s so important to have?

1039

What is structure of java heap? What is perm gen space in heap?

1195

what is a cell in websphere?

951

What do you mean enterprise javabeans (ejb) container?

1210

What is a messaging bridge?

1035

Describe in brief RequestDespatcher?

1210

Is spring boot a lightweight? : Spring Boot

521

What is contractor means and methods?

1046

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