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

Java J2EE (14736)
J2ME (151)
Java Related AllOther (507)

Java Related Interview Questions

Questions Answers Views Company eMail

What are legal modifiers that we can use to declare an inner class?

Infosys,

1 3385

What is difference between “==” and equals()?

IBM,

1 3048

Why do we need to override equals() and hascode() method of object class?

Cognizant,

1 3581

How to override equals() and hashCode() method in java?

Wipro,

1 3215

Are the equals() and hashCode() protected methods of object class?

Avaya,

1 3720

What are the uses of final, finally and finalize in java?

Agiline, FINO PayTech, HCL,

2 3920

Describe OOP in java?

Syntel,

2 4279

What is difference between overloading and overriding?

Accenture,

2 5187

Why do we need main method to execute a java program?

Virtusa,

1 4011

How do we make a class serialize?

Syntel,

3 4556

What is serialVersionUID and what is its need?

KPIT,

1 3745

What is deserialization and how do we do deserialization?

Synechron,

3 4819

What is difference between compatible and incompatible changes in serialization?

Synechron,

1 4312

What is Difference between Serializable and Externalizable in Java serialization?

Cognizant, IBM,

1 4108

What is an object in Java and what are its benefits?

IBM,

4 5449

Un-Answered Questions { Java Related }

Can I set up a connection pool with multiple user IDs? The single ID we are forced to use causes problems when debugging the DBMS.

951

What are session variable in servlets?

1029

How many digits can a float hold?

1011

What is front controller in spring mvc?

422

State one difference between a template class and class template.

1068

What does flagged out mean?

1061

What is the difference between Logical Parallelism and Physical Parallelism?

3399

What is purpose of hibernate?

572

What are the exceptions thrown by servlets? Why?

1171

What is the difference between Error, defect,fault, failure and mistake?

1205

What is a treeset in java?

1039

How does autowired work in spring?

463

What do you mean by inner class in java? Explain

1068

Which script to change the java sdk used by profile?

874

What is method overloading in java ?

1087

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