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Categories >> Software >> Java Related >> Java J2EE >> Core Java
 
 


 

 
 Core Java interview questions  Core Java Interview Questions (1720)
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Question
which class to use when concatenating
   strings in a loop.
 Question Submitted By :: Stalin
I also faced this Question!!     Rank Answer Posted By  
 
  Re: which class to use when concatenating strings in a loop.
Answer
# 1
StringBuffer 
Is This Answer Correct ?    7 Yes 0 No
Geeta
 
  Re: which class to use when concatenating strings in a loop.
Answer
# 2
we any use the both classes String and StringBuffer.
but if we use StringBuffer it would be advatagebecase we
are going to create only one Object.if we use the String
class it is going to create the one for each itration.now
it up to you which one to use
 
Is This Answer Correct ?    4 Yes 3 No
Narasimha
 
 
 
  Re: which class to use when concatenating strings in a loop.
Answer
# 3
string buffer and string builder classes are used to
concatenate the two or more strings in a loop.
 
Is This Answer Correct ?    0 Yes 0 No
Sitaram
 

 
 
 
Other Core Java Interview Questions
 
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We can write any Java Logics in our JSP. Then why we are using servlets(Controller Layer) to interact with the DAO ? TCS 6
What is the purpose of finalization?   4
what is ejb? what is the importance of ejb? Photon 2
WHAT IS MARKER INTERFACE,AND NO METHODS IS NOT THERE ON THAT INTERFACE THEN WHY WE USED IN JAVA? L&T 3
What is Runtime class and its purpose?   2
Why Java is called as purely platform independent..? Explain briefly..dont Give regular answers Explain with your own example..?   5
What is more advisable to create a thread, by implementing a Runnable interface or by extending Thread class?   5
What is the smallest package in Java API? iGate 5
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
What are null interfaces? Give some examples?   2
Name the package that most of the AWT events that supports event-delegation model are defined?   2
What is meant by final class, methods and variables?   3
 
For more Core Java Interview Questions Click Here 
 
 
 
 
 


   
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