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Core Java Interview Questions
Questions Answers Views Company eMail

what is the need of the Ajax?

iFlex,

5 5240

I want to know the host name and provider name for tcs web mail

RSG, TCS,

5 14868

How Array List can be Serialized.

Polaris,

7 11213

Why we use static and synchronized in method for single thread model example: public static synchronized add(){}

2 4334

what is main difference b/w abstract class and interface

4 5613

if arraylist size is increased from initial size what is the size of arraylist...suppose initial is 100 , if i add 101 element what is the size...

10 27685

why interfaces are faster than abstract classes?

4 16508

how to call a method in different package?

4 15836

How to create two different thread class inside a main function?

1 3779

why String class is immutable.

iGate,

5 10506

How to sort a vector elements that contains the user define class object? (Note: If Suppose consider, A Student class contain two data members. They are String studentName and int rollNo. I am creating Four objects for this class, each object contains students details like name and roll no. Now i am storing that objects in vector and if i retiving the elements from the vector means then it should be display in sorting order)

ProdEx Technologies,

3 6641

what is aberivation of java?

14 11522

explain about jre and jvm

2 5574

what is difference between abstract and interface? can i give real time example for the two topics?

7 8666

Is java is a fully object object oriented language?

TCS,

31 22308


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Un-Answered Questions { Core Java }

How to make a read-only class in java?

149


What do you mean by scope of variable?

98


What is a Null object?

221


what is thread? What are the high-level thread states? : Java thread

164


Is null a keyword in java?

139






Can a static class have a constructor?

107


What is variable and constant explain with example?

110


what is the constructor and how many types of constructors are used in java?

133


What is "this" keyword in java? Explain

137


What is the properties class in java programming?

139


What is the use of math abs in java?

118


What is the use of put method?

107


Can we call virtual funciton in a constructor ?

1349


What is arrays aslist in java?

99


What modifiers may be used with an inner class that is a member of an outer class in java programming?

142