Java J2EE Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

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.

1 2310

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

iFlex, TCS,

18 56787

How to set Connection Pool size in Weblogic Server ?

Infosys,

11 39715

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

Mind Tree,

5 14730

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

Microsoft, Mind Tree, Tech Mahindra,

2 25524

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 12352

how can i connect to database in a applet ?

1 5081

when to use abstract class and when to use interface?

Exterro, iGate, IonIdea,

16 59482

what is difference between class and object?

College School Exams Tests, HCL,

43 93819

Un-Answered Questions { Java J2EE }

Write a program to print count of empty strings in java 8?

1078

What is java string pool?

1076

what are the different modes of archival? Explain each mode in two lines each?

994

What is latest hibernate version?

486

Realized?

2256

Explain public static void main(string args[]) in java.

1063

What is a classloader in java?

1083

How can you inject java collection in spring?

503

What do you mean by an interface in java?

1095

Can we return resultset in java?

986

What are the differences between heap and stack memory in java?

1126

What is lazy class?

480

How is declarative handling of exceptions done in struts ?

1001

What is a constructor overloading in java?

1121

How to sort array in descending order in java?

986

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