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 7450

what is difference between servletconfig and servletcontext?

Amdocs,

3 7902

what is custom tags with example?

Amdocs,

3 7423

what is connection pooling with example?

Amdocs,

3 11241

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

EDS,

2025

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

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

2 13593

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

CMC,

1 5454

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

Cycore, DNS, Technoram,

2 14750

what is overloading and overriding with example?

CMC,

2 16628

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

T3 Softwares,

1 4771

How is Garbage collection done in Java?

T3 Softwares,

3 9626

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 31958

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

iFlex,

4 8165

explain System.out.println()

CTS,

12 20480

what is wrapper class and its uses?

2 7159

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Un-Answered Questions { Core Java }

Can vector have duplicates in java?

1006

List some oops concepts in java?

1096

What is the difference between JDK and JVM?

1358

What is the use of conditional statement?

1044

What are the advantages of inner classes?

1072

What is the difference between hashset and treeset in java?

1120

Can we declare an array without size in java?

1068

What is difference between equals and hashcode method?

1217

What class allows you to read objects directly from a stream?

1393

Explain the polymorphism principle?

1085

Why do I need to declare the type of a variable in java?

1167

what is the major difference between linkedlist and arraylist in java?

1323

How many bytes is string in java?

1338

why not override thread to make a runnable? : Java thread

1070

What is java and its types?

1184

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