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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 9509

what's diff between struts 1.1 & 1.2

Wipro,

3 24821

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

TCS,

9 19002

what is an virtual function

TCS,

2 4962

what is the difference b/w design pattern and architecture

Covansys,

4 7791

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

 3 4527

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

 4 11363

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

Tanla Solutions, Wipro,

7 11137

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

 3 8401

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

CSC,

10 25368

how u do unit testing?

iFlex,

2 4901

How u dubugg ur project?

iFlex,

1 5565

who was the founder of java

CTS, HCL, ProKarma,

32 47111

what is mean by method signature?

Satyam,

5 7978

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

Satyam,

2 4679

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Un-Answered Questions { Core Java }

What is the function of log?

535

How can we run a java program without making any object?

529

What are the new features in java 8? Explain

545

What happens when I use / and % with a negative numerator?

526

What is json parser in java?

599




When a byte datatype is used?

555

Why does java not allow multiple public classes in a java file ?

3421

Can we assign integer value to char in java?

499

What is byte data type?

535

Is it possible to override the main method?

523

Explain listiterator and methods in listiterator?

537

Explain why wait(), notify() and notifyall() methods are in object class rather than in the reading class?

547

What is jit compiler in java?

571

How to change value in arraylist java?

485

What is valid keyword in java?

543

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