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Java J2EE Interview Questions
Questions Answers Views Company eMail

what is the diff's between swing and applet?

Invictus, Patni,

17 45610

what is the difference between equals method and ==

IBM, Professional Access, TCS,

17 22563

what is connection pooling?

Wipro,

6 16052

Is form beans are serializable or not?

College School Exams Tests, Magna Infotech,

11 20510

how many design pattern r there? and wht design pattern u use and why ?

HP,

5 9294

what is the disadvantages of using DynaActionForm in struts framework?

HCL,

5 17206

how to make a index.jsp for running the site in internet and find an error for connection with weblogic server and java that give an error invalid object name.and how to maintain session.

 1740

What is Virtual Host in Weblogic , how to create it & what is the advantage ?

iFlex, TCS,

18 49640

How to set Connection Pool size in Weblogic Server ?

Infosys,

11 35106

what is the difference b/w PUT and POST method to send data to the server

Mind Tree,

5 12222

what s the difference b/w EJB 2.0 and EJB 3.0 technically

Microsoft, Mind Tree, Tech Mahindra,

2 24172

In the first round, there are 30 aptitude and 30 java questions. We are suppose to finish both the papers within 60 minutes. I cleared this round. Next was test for programming skills. In this section, Some 7 n's were asked. 1. What is the difference b/w sleep(1000) and wait(1000) 2. what is the diff b/w static block and static function? 3. Write a program to validate IP address using string tokenizer. 4. Write a program to create singleton class 5. write a function to reverse the string 6. Write a prog to print prime nos upto n. EX: If n=9, It shld print 1,2,3,5,7 7. One program on collections- Write a program to print no. of times a number is repeating in an array. EX- {1,3,1,2,5,7,3,7,34,3,8,3} It should print: 1- 2 times 3- 4 times and so on 7. Write a func to print fibonocci series After this I had technical interview, which went on for. 60 mins or so. There were qn's about multi threading, Exception handling and collection classes. Knowledge about collections was very important for the post I was interviewed for.

Huawei,

1 11355

how can i connect to database in a applet ?

 1 4116

when to use abstract class and when to use interface?

Exterro, iGate, IonIdea,

16 54301

what is difference between class and object?

College School Exams Tests, HCL,

43 80847

Un-Answered Questions { Java J2EE }

What is persistence context in hibernate?

199

Does jdbctemplate close connection?

493

what is the command used for starting the queue manager?

461

What is files manifesting?

1714

Can we call the constructor of a class more than once for an object?

616




What is tag library descriptor?

248

Explain the difference between collection api and stream api in java8?

499

What is a domain template?

548

What are the design principles for ejb?

516

What is the implementation of the bean factory container?

161

Explain annotation-based (@aspectj based) aspect implementation?

161

How will you serialize a singleton class without violating singleton pattern?

1511

Explain how to force the garbage collection in java.

520

Is string thread safe in java?

566

What is the purpose of abstract class?

515

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