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

Core Java Interview Questions

Questions Answers Views Company eMail

What is the difference between add() and addElement() method in Vector Class ?

TCS,

2 18046

Can we add two byte variables and assign the result to a byte variable ? b=b1+b2 where b,b1,b2 are byte types

TCS,

4 20699

How can we find size of the object ?

CTS, RazorSight,

5 12273

Howmany classes that package java.applet.* contains?

TCS,

1 5959

How to reduce flicking in animation?

TCS,

3 5576

How to print nodes of a Binary tree?

TCS,

1 5481

What is I/O Filter?

TCS, WAX,

2 13090

How to initialize an Applet ?

TCS,

9 21959

Can you call a private data from an inner class?

6 8132

Can multiple catch statements be used in exceptions ?

Wipro,

6 9923

Difference between Application and Applet ?

Wipro,

4 9485

Can a class inherit the constructors of its superclass?

iFlex, Wipro,

9 19786

What is 3-tier model?

Wipro,

3 7284

For which statements we use a label?

Wipro,

3 5737

How to eliminate duplicates from an array?

ABC, AdMod, Adobe, College School Exams Tests, Patni, Wipro,

6 21168

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Un-Answered Questions { Core Java }

Is null a string in java?

544

What does g mean in regex?

549

Is math an abstract class in java?

523

What do you understand by soft reference?

575

What are multiple inheritances? Is it supported by java?

450

How do you find the maximum number from an array without comparing and sorting?

624

What is the final keyword?

542

What is the largest long allowed by java?

521

What is an exception? difference between Checked and Unchecked exception in Java

544

What are the advantages and disadvantages of reference counting in garbage collection?

562

What is difference between null and void?

518

How variables are stored in memory?

525

what are three ways in which a thread can enter the waiting state? : Java thread

561

Explain about the select method with an example?

577

What is a platform?

526

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