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

Core Java Interview Questions

Questions Answers Views Company eMail

why there are multiple catches for a try block.don't tell me that there can be multiple exception of a code segment that's why.tell me the real fact behind this.

4 8864

Which are thin and thicK wrapper Class's in Java?

1 8509

Hi, This is ravi i have a question like this i have string "UNDERSTAND" now i want to count the letters how many times it occures.i.e from the above string the out put should be like this U-1,N-2,D-2,E-1,R-1,S-1,T-1,A-1. how can i achieve this Thnaks in advance for your response ..

7 8473

Why do inner class cannot have static declaration except static nested class?

TCS, Wipro,

2 12762

What is the basically use of finally while we know it is always executed but why?

Oracle, TCS,

5 9509

Why can't we make jsp as a controller and action servlet in struts?

TCS, Wipro,

8 12890

What is the difference between error and exception and explain in simple words not whatever is given in the book.

7 13110

What is the differnence between String Buffer and String builder despite having knowledge that String builder is faster than String Buffer and last one is threadsafe.please tell another important difference.

IBM,

3 8901

define System.out.println(); what is the meaning!

Accenture,

19 41666

whats string ?

HCL,

10 12491

After compilation of java program we'll get .class code. If it's generated in OS Windows XP will it work on OS Linux? If yes why? If no why?

Aricent,

5 9776

What are the OOAD concepts in java explain with examples?

Aricent, CTS,

4 33356

What is difference between Eclips and MyEclips?

3 7311

what is the difference between sleep() and Wait()?

Accenture, Amdocs,

10 48831

What is escape analysis algorithm in JVM and how garbage collection actually worked n how it transfer the objects from one kind of space to other?

2177

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Un-Answered Questions { Core Java }

How do you escape a string?

1048

What is the basic concepts of OOPS?

1252

What is a local block?

1196

What is the list interface?

1136

What is the finalize method do?

1160

What are nested classes in java?

1173

Enlist diffrent types of inheritance supported by java?

983

What is difference between static and final?

1137

Why hashcode is used in java?

1031

How do you initialize an arraylist in java?

1103

What is generic class?

1139

Is 0 true or false in java?

1036

If we allocate the memory using 'new' & de-allocated using 'free' then what will happen?

1095

Define linked list and its features with signature?

1054

Is minecraft java edition free?

1172

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