Several problems can arise when applications contain a mixture of data access code, business logic code, and presentation code. Such applications are difficult to maintain, because interdependencies between all of the components cause strong ripple effects whenever a change is made anywhere. High coupling makes classes difficult or impossible to reuse because they depend on [...]

Have you ever thought why OEM(Original Equipment Manufacturer) versions of both Software and Hardware is very cheap? or what’s the difference between OEM and retail version? For example, retail version of a DVD RW comes with all the required cables,screws, Nero burning rom or Roxio DVD Creator or any other disk burning software, [...]