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Core Java Interview Questions
Questions Answers Views Company eMail

which method is used to know the status of the Thread?

Honeywell,

9 12960

is this possible to create an array of 0 length? if so how? if not so why? coz we have an array in main() likw this "static void main(String [] s) then what it signifies?

Hexaware, TCS,

3 16992

Is it possible to write static method in abstract class? justyfy your answer?

Hexaware,

5 13656

what is the difference between HashMap And HashTable?

Hexaware,

5 11109

what is the difference between abstract class and Interface?where we can use it in realtime projects?

Agile Software, Cognizant, IBM, Innodata, Logica CMG, Mitosis, Nagarro, Value Chain,

23 64741

How many bits are used to represent unicodde,ASCII,UTF-16 and UTF-8 characters?

 2 5195

which class to use when concatenating strings in a loop.

IBM,

3 7575

what are depricated methods ?

Satyam,

5 9512

What is multiple inheritance & can we implement it in java?

Satyam,

6 12975

what is the difference between cd & dvd ?

Lovely Professional University, Satyam, Sibylsys,

30 48595

why java does not support multiple inheritance

Diamond, Euclid, Evergent, KLKJ, Mind Tree, NIIT, SSI Small Scale Industries, Wipro,

41 93081

why to use transient variables when static variables can be used for Serialization

 4 19151

what is the difference between HashMap and Hashtable

Value Labs, Virtusa,

17 57990

what is the difference between ArrayList and Vector

KPIT, Sasken, Satyam, Span Infotech, Wipro,

19 43638

what is the difference between @include page and @include file

 2 7882

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Un-Answered Questions { Core Java }

Can you write a java class that could be used both as an applet as well as an application?

509

What is a numeric digit?

574

What is use of static in java?

514

Why do we use string?

568

What 5 doubled?

498




What is tostring () method?

534

What are scalar data types?

515

What is volatile data type?

538

Explain the scope or life time of class variables or static variables?

506

What is object-oriented programming?

563

Is arraylist dynamic in java?

511

How do you remove spaces in java?

524

What is int argc char * argv?

558

Is integer immutable in java?

538

What is a double?

580

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