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 more advisable to create a thread, by implementing a Runnable interface or by extending Thread class?

5 11366

what's diff between struts 1.1 & 1.2

Wipro,

3 26026

why applet doesn't have main? isn't possible a program with out main?

TCS,

9 22182

what is an virtual function

TCS,

2 6057

what is the difference b/w design pattern and architecture

Covansys,

4 9252

What is emant by API? is it related to java only or it is common for all OOPS supporting language?

3 5739

What is means by DLL file means ? What is the use of DLL file? What are the contents of DLL file?

4 13040

without using arthematic operation ,how can you write the logic for adding/substraction/multiplication?

Tanla Solutions, Wipro,

7 13696

How to create an instance of a class if the class has private constructor?

3 9590

How to create an instance of a class without using "new" operator? Plz help me out properly.Thank u.

CSC,

10 28444

how u do unit testing?

iFlex,

2 6163

How u dubugg ur project?

iFlex,

1 6429

who was the founder of java

CTS, HCL, ProKarma,

32 56538

what is mean by method signature?

Satyam,

5 9703

what is mean by String and StringBuffer? What is mean by Methooverriding and Overloading?

Satyam,

2 5810

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Un-Answered Questions { Core Java }

What is a dynamic array in java?

1178

What is a void method?

921

What does the “static” keyword mean?

1103

How to display arraylist values in java?

1009

What is the difference between heap memory and stack memory?

1073

What is meant by distributed application? Why are we using that in our application?

947

Is null a value?

1040

When super keyword is used?

1009

What is the purpose of declaring a variable as final?

971

What is ++ a in java?

979

What is update method called?

1157

What is a “stateless” protocol ?

990

What is null mean in java?

1097

How do you override a method?

1016

What are the types of java languages?

976

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