Saturday, November 01, 2008

Difference between Static and Singleton Pattern

I wanted to blog about this for a while, b'cos I found many folks not being able to answer this question during the interview process.  Few differences worth mentioning are

  • Singletons can implement interfaces and inherit from other classes (while static classes cannot).
  • Singletons can be extended (used as a subclass) while static classes cannot.
  • There is only one instance in case of Singletons but there is none in case of Static classes.
  • Singletons can be passed around as a parameter to function calls but you can't do that with a Static class.

2 comments:

Nikhil Goel said...
This comment has been removed by the author.
Nikhil Goel said...

Abe saale, ye .net 3.0 ki baaten mat likh please. We are still in 2.0

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