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

when i write string s1="java"; in one program(application) and string s2="java"; in another application on the same jvm will both objects s2,s2 will refer to same memory location where "java" is stored in string pool.

2 5667

Is Struts Action class Thread Safe?

Wipro,

14 53513

Why operator overloading is not in Java?

2077

What is the difference between throw and throws? What is the similarity between try and throw?

2 5747

Is it possible to create Userdefined Unchecked Exception also?If Yes, give an example?

HCL,

1 4711

What is the need of "creating and throwing an UserdefinedException" when the "Exception" class is already available?

4 6762

Is it possible to create Userdefined Unchecked Exception also?If Yes, give an example?

ADP,

2 8857

What is JIT ?

Satyam,

4 10043

How to implement or use the singleton class in java?

3 8093

can we add two numbers without using arthematic operators? if possible how?

CTS,

5 9712

why the equals method can be override?when we override the equals method?

5 11107

why the wait,notify,notifyall methods are placed in object class?these are the thread concepts why these methods are placed in Object class?

Global Logic, Satyam,

2 11549

using equals method overriding which objects are compared?i.e same class objects or other class objects?Explain me.

4 6410

If set accepts only one argument then how can it compare two objects to avoid duplicates

5 7149

can u override the start() method of Thread class

5 20163

Un-Answered Questions { Java J2EE }

How can you share data between two thread in Java?

945

What is literal example?

952

define the terminology association.

1104

how to connect to database to the remote system?

923

Is spring boot an open source? : Spring Boot

540

What is @mapsid?

580

Can we call the run() method instead of start()?

1040

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

1092

What is the procedure of operation of a form tag?

962

Why doesn’t a servlet include main()?

1050

How many types of logs are there?

1055

How are springs formed?

418

What inbuilt themes are provided by struts2?

1108

What is cross cutting concern and concern in spring aop?

420

What are some alternatives to inheritance?

1102

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