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

Difference between doublesummarystatistics, intsummarystatistics and longsummarystatistics ?

1000

Difference between final and effectively final ? Why is effectively final even required ?

1005

Similarity and difference between static block and static method ?

944

Difference between class#getinstance() and new operator ?

1231

What is a lambda expression ? What's its use ?

1127

Describe what happens when an object is created in java ?

1024

Difference between == and .equals() ?

1020

What are default methods ?

1062

Does constructor creates the object ?

1055

What are the difference between composition and inheritance in java?

1045

How is abstraction implemented in java ?

1048

How can we disable a constraint ?

1037

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

993

Write an sql to find all records having all numeric characters in a field ?

992

Explain the difference between inner and outer join ?

1053

Un-Answered Questions { Java J2EE }

What is the difference between singleton and prototype scope in spring?

487

What is jdbc odbc connection?

991

What are the types of interface used in the java collections? : java collections

1051

Explain what is queuemanager in ibm websphere mq?

852

Why is Servlet so popular?

1086

Which sorting algorithm is used by collections.sort() in java ?

947

Is it legal to have static initializer blocks in ejb?

1021

How to use union all in hibernate query?

436

What is spring’s ioc container?

417

What is the use of configuration in hibernate?

477

What is mappedby attribute in hibernate?

423

Is infobus easy to use?

1059

Is java a digit method?

1015

How components are used in hibernate?

397

What is a spring data repository?

462

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