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 ennumaration?

Amdocs,

2 7336

what is difference between servletconfig and servletcontext?

Amdocs,

3 7758

what is custom tags with example?

Amdocs,

3 7272

what is connection pooling with example?

Amdocs,

3 11055

what is the use of bean managed and container managed with example?

EDS,

1978

what is difference between type 4 driver and type 1 driver?

CMC, CTS, IBM, JK Technosoft, Napier Healthcare,

2 13460

what is difference between prepare stetement and callable starement with example?

CMC,

1 5339

what is the use of abstract class and interface with example?

Cycore, DNS, Technoram,

2 14621

what is overloading and overriding with example?

CMC,

2 16508

C and C++ has constructors and distructors, why does Java does not have distructors?

T3 Softwares,

1 4686

How is Garbage collection done in Java?

T3 Softwares,

3 9478

Difference between overloading and Overriding. (also asked in PA Consultancy Group,iflex,Value chain,IBM,CTS,Accenture, Tarang>

Accenture, CTS, Extensio, IBM, iFlex, PA Consulting, Symphony, Tarang,

12 31498

where is .equals() method and how is it different from == operation Is hashing related to these?

iFlex,

4 7998

explain System.out.println()

CTS,

12 20062

what is wrapper class and its uses?

2 7022

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Un-Answered Questions { Core Java }

what methods would you overwrite in java.lang.object class?

1006

What means public static?

1043

Can we compare two strings in java?

1029

How to avoid memory leak in java?

1142

Wha is the output from system.out.println(“hello”+null); ?

1145

Will the jvm load the package twice at runtime?

1101

Can static methods be inherited?

1050

What are structs in java?

1065

What does int argc char * argv [] mean?

999

What is private protected in java?

1056

what is the difference between the methods sleep() and wait()? : Java thread

976

Can we access instance variables within static methods ?

1101

What are methods of a class?

1037

What is the structure of java?

1034

What is array list in java?

1087

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