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Core Java Interview Questions
Questions Answers Views Company eMail

why the constructor should be used in class,if there is no constructor what will happen?

 4 6269

explain the clone method and clonable interface

 1 6817

what are depricated methods in threads and explain the lifecycle methods

CTS,

5 11153

explain the classification of exception and hoew to handle the exceptions

 2 9134

what is java

 10 8948

what is Assertion?

Wipro,

4 13811

When does the compiler supply a default constructor for a class?

TCS,

9 15523

Which Math method is used to calculate the absolute value of a number?

Accenture,

3 8454

How does serialization work

Ordain Solutions,

3 10003

To what value is a variable of the Boolean type automatically initialized?

 3 7245

What is the exact difference in between Unicast and Multicast object ?

Accenture,

4 25040

What is the difference between Stream Reader and Stream Writer?

 4 15946

Which class should you use to obtain design information about an object

 2 7362

Why we need to serialize the object

CTS, Geometric Software,

11 36476

can we have virtual functions in java?

Wipro,

11 43967

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Un-Answered Questions { Core Java }

Can we convert stringbuffer to string?

568

How do you reverse sort a list in java?

517

List some features of the abstract class.

597

Why main method is static in java?

600

What are the string methods in java?

586




What are the Static and Dynamic Variables? Differentiate them.

609

Why set do not allow duplicates in java?

585

Explain about automatic type conversion in java?

573

How can we make a class singleton?

584

How can we run a java program without making any object?

549

Can java cast null?

601

Which is bigger float or double?

522

Why is it important to initialize a variable?

500

Can you instantiate the math class?

604

Explain the private protected method modifier?

550

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