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 19527

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 22714

How can we find size of the object ?

CTS, RazorSight,

5 15039

Howmany classes that package java.applet.* contains?

TCS,

1 7314

How to reduce flicking in animation?

TCS,

3 7315

How to print nodes of a Binary tree?

TCS,

1 6514

What is I/O Filter?

TCS, WAX,

2 14158

How to initialize an Applet ?

TCS,

9 25192

Can you call a private data from an inner class?

6 10127

Can multiple catch statements be used in exceptions ?

Wipro,

6 12263

Difference between Application and Applet ?

Wipro,

4 11269

Can a class inherit the constructors of its superclass?

iFlex, Wipro,

9 23136

What is 3-tier model?

Wipro,

3 8483

For which statements we use a label?

Wipro,

3 6980

How to eliminate duplicates from an array?

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

6 24197

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Un-Answered Questions { Core Java }

What is polymorphism in java? What are the kinds of polymorphism?

1072

What is garbage collection? Can it be forced to run?

1008

What is null statement?

1014

Can a constructor be protected?

1087

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

1018

What are the ways in which a thread can enter the waiting state?

943

What is a lightweight component?

1023

What initialize variables?

1023

What is variable and rules of variable?

1020

What’s the difference between applets and standalone program?

1047

Mention a package that is used for linked list class in java.

982

What is port number in java?

1041

Why string is immutable or final in java

1085

If you do not want your class to be inherited by any other class. What would you do?

1005

Why pointers are not used in java?

1130

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