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 19622

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 22916

How can we find size of the object ?

CTS, RazorSight,

5 15258

Howmany classes that package java.applet.* contains?

TCS,

1 7400

How to reduce flicking in animation?

TCS,

3 7438

How to print nodes of a Binary tree?

TCS,

1 6614

What is I/O Filter?

TCS, WAX,

2 14250

How to initialize an Applet ?

TCS,

9 25502

Can you call a private data from an inner class?

6 10288

Can multiple catch statements be used in exceptions ?

Wipro,

6 12470

Difference between Application and Applet ?

Wipro,

4 11428

Can a class inherit the constructors of its superclass?

iFlex, Wipro,

9 23388

What is 3-tier model?

Wipro,

3 8584

For which statements we use a label?

Wipro,

3 7075

How to eliminate duplicates from an array?

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

6 24394

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Un-Answered Questions { Core Java }

What will be the initial value of an object reference which is defined as an instance variable?

1193

Differentiate between the constructors and methods in java?

990

What is variable and rules of variable?

1064

Can you create an object of an abstract class?

1072

Why does java have different data types for integers and floating-point values?

1061

What is an association?

1035

What is java’s garbage collected heap?

1031

How to write custom exception in java?

1106

Can an abstract class be a final class?

1038

What is the same as procedures?

1035

What is the difference between the final method and abstract method?

1113

How big is a 32 bit integer?

1094

Hi i am creating desktop application in that i want calling to mobile number. i have java telephone api (JTAPI) but i dont understand how it configure & use plese help me

1889

What is passed by reference and pass by value ?

1082

Explain creating threads by implementing runnable class?

1234

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