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 11374

what's diff between struts 1.1 & 1.2

Wipro,

3 26027

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

TCS,

9 22195

what is an virtual function

TCS,

2 6061

what is the difference b/w design pattern and architecture

Covansys,

4 9256

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

3 5743

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

4 13042

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

Tanla Solutions, Wipro,

7 13698

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

3 9592

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

CSC,

10 28456

how u do unit testing?

iFlex,

2 6167

How u dubugg ur project?

iFlex,

1 6431

who was the founder of java

CTS, HCL, ProKarma,

32 56563

what is mean by method signature?

Satyam,

5 9709

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

Satyam,

2 5813

Post New Core Java Questions

Un-Answered Questions { Core Java }

What is a java object and java application?

1056

What is Classloader in Java?

1222

why would you use a synchronized block vs. Synchronized method? : Java thread

952

Differentiate jar and war files?

1041

What do you mean by append?

1072

Is array serializable java?

988

Which collection is thread safe in java?

993

Is singleton set an interval?

967

design an lru cache in java?

1006

What's the difference between comparison done by equals method and == operator?

973

What is difference between Heap and Stack Memory?

1053

When is the finalize() called? What is the purpose of finalization?

1080

What is an array in java?

1201

What is the difference between a local variable and an instance variable?

1109

How to instantiate member inner class?

1084

For More Un-Answered { Core Java } Questions Click Here