Is diploma in computer science equivalent to BSc in computer science?

its a diploma or certificate to say your qualified to understand and repair computers and servers

Both are the same and are important.It just depends on what you are interested in.By the way,good marks is the most important of all.

There is a science of everything. There is a science of keyboarding, there is a science of playing chess, a science for building a perfect table or chair. Ever heard the quote-"I've got it down to a...

because it has nothing to do with any of the three main sciences (chemistry, biology,physics) and computers are ict so ..... :)

It is called Computer Science because you are learning how a computer works and operates and how to translate that into human language. E.g. How a computer processes information, making programs...