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Java J2EE Interview Questions
Questions Answers Views Company eMail

What is garbage collection in Java, and how can it be used ?

Accenture, HCL, Infosys, Sara, SITS, TCS, Wipro,

32 63499

Differentiate Vector and ArrayList?

Max Telecom, Wipro,

6 9932

Differentiate constructor and a method and how are it be used?

Wipro,

7 10644

What is an abstract class?

DBS, Wipro,

7 9364

How can final class be used?

Accenture, Wipro,

5 11226

By what default value is an object reference declared as an instance variable?

Wipro,

1 12021

Java support what type of parameter passing ?

Wipro,

7 13880

Explain the term serialization?

Wipro,

10 11842

Is there is any error if you have multiple main methods in the same class?

Infosys, Wipro,

10 13462

What is Overriding and how can it be used?

Consagous, Wipro,

7 15438

How is serialization used generally ?

 3 5792

How are Swing and AWT be differentiated?

Wipro,

3 6881

Explain pass by reference and pass by value?

IBM, Wipro,

8 13989

In which way does a Primitive data type is passed ?

Sun Microsystems,

5 9297

What happens when a main method is declared as private?

DELL, Infosys, L&T, Sun Microsystems,

22 42833






Un-Answered Questions { Java J2EE }

What are the advantages of spring framework?

13

How do you add an element to an arraylist in java?

132

What is a treeset in java?

139

What do you understand by java?

137

What is JDBC RowSet? What are different types of RowSet?

187




When is the finalize() called?

163

which book is better for jdbc ,servlets and jsp

1192

How do we modify hibernate configuration file?

1

What is thymeleaf template?

10

Can we update primary key in hibernate?

1

Some problem is there in web server, so this information which log file contain?

160

What are the different ways of creating thread?

157

What is purpose of execandwait interceptor?

160

Can a method be overloaded based on different return type but same argument type?

175

Do hamsters hibernate?

1

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