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

Accenture NJ mostly ask question on Collection like 1)How to sort Objcts and how treeset sort them 2)Explain mechanism of Hashcode finding in Java 3)Name some of the Sorted collection.

Accenture,

2 8059

could you run the java program without main method?

6 16058

My interview asked what is dynamic variable in java and where we use them.

IBM,

2 7586

How we store procedure in oralce for callable statements in jdbc

2334

what are the new features of Webservices 1.6 than 1.4.From the interface and implementation aspect4.

2178

"we cannot create an object of interface but we can create a variable of it".diacuss the statement with the help of an example.

2 7710

Can I create any Marker Interface? If yes then how can I use it???

4 11657

Give me some example for getting connection from connection pooling in JBoss Server. Is Connection Pool default in Server or we have to create it? Who can create Connection Pool in a Team. How it will be accessed by the developer code?

TCS,

1 4872

how can we load a file of a user in the database table?

ITC Infotech,

3 6057

java.lang.ClassNotFoundException:oracle.jdbc.driver.OracleDr iver? I get this error at run time.I used oracle10G. I set CLASS PATH:C:\oraclexe\app\oracle\product\10.2.0 \server\jdbc\lib\ojdbc14.jar; I write JDBC PROGRAM like import java.sql.*; class Example { public static void main(String args[]) { try { Class.forName ("oracle.jdbc.driver.OracleDriver"); System.out.println("Driver Loaded"); Connection con=DriverManager.getConnection ("jdbc:oracle:thin:@localhost:1521:xe","system","salmas"); System.out.println("Driver Connected"); Statement st=con.createStatement(); ResultSet rs=st.executeQuery("select * from emp"); while(rs.next()) { System.out.println(rs.getInt(1)); System.out.println(rs.getString(2)); System.out.println(rs.getString(3)); } st.close(); con.close(); } catch(Exception e) { System.out.println(e); } finally { System.out.println("it's finally block executed"); } } }

CTS,

6 25108

Possible ways for debugging java ,javascript,jsp and servlet. Can we use System.out.println debugging java.

2 5641

please send code example of inner classes?

2 5511

how team leaders assign work for the team member like through papers,word document

TCS,

1 5863

what is the use of clone method? why user cant overwrite in sub class without its proper defination.

TCS,

2 6290

what is object deep copy and shallow copy and why it is required?

2 8980

Un-Answered Questions { Java J2EE }

What are the drawbacks of singleton class?

1003

What if you need to span your transaction across multiple servlet invocations?

1090

What is the difference between sessionfactory and session in hibernate?

396

What is the generic class?

965

What are the major benefits of hibernate?

377

Is vector ordered in java?

994

What is numeric data type?

989

How java enabled high performance?

1051

How to access arraylist elements in java?

991

take an array with -ve and +ve value both.find out the nearest value of 0(zero).if two values are same like(-2 and +2)then extract +2 is nearest of 0(zero).

1979

How can you retrieve data from the resultset using jdbc?

1069

What is the ==?

883

What is an abstract method?

1065

Java.util.regex consists of which classes?

993

Why do we use bufferedreader?

1002

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