[sushantsharma]

I see a common argument in the comments here. Many of us are saying this is "Computer Science" and not "Software Development". In my opinion, knowledge of the answers to these questions will make you a better software developer. Ofcourse, without knowing any of these, you can still develop software that will work. But if you know answers to these questions (and many other similar computer science questions), you can make smart decisions on how to implement the software you are developing in a more efficient manner.