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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 62740

Differentiate Vector and ArrayList?

Max Telecom, Wipro,

6 9714

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

Wipro,

7 10391

What is an abstract class?

DBS, Wipro,

7 9157

How can final class be used?

Accenture, Wipro,

5 11053

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

Wipro,

1 11905

Java support what type of parameter passing ?

Wipro,

7 13619

Explain the term serialization?

Wipro,

10 11602

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

Infosys, Wipro,

10 13208

What is Overriding and how can it be used?

Consagous, Wipro,

7 15240

How is serialization used generally ?

 3 5665

How are Swing and AWT be differentiated?

Wipro,

3 6771

Explain pass by reference and pass by value?

IBM, Wipro,

8 13789

In which way does a Primitive data type is passed ?

Sun Microsystems,

5 9134

What happens when a main method is declared as private?

DELL, Infosys, L&T, Sun Microsystems,

22 42142






Un-Answered Questions { Java J2EE }

What are the components of J2EE application?

131

What are types of j2ee clients?

122

What is a server side include (ssi)

117

What are the main differences between notify and notifyAll in Java?

159

How can you create jdbc statements?

113




What is the difference between @autowired and @qualifier?

13

Different spring bean scope.

11

What is java ee technologies?

64

What do you mean by of string::valueof expression in java 8?

139

What is the new basic requirement for a cmp entity bean class in 2.0 from that of ejb 1.1?

113

What does ejb stand for?

93

What is the default cache in hibernate?

1

What Is The Purpose Of Clustering ?

142

What is hibernate configuration file?

1

What is spring boot in java? : Spring Boot

11

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