Answer 1

A stream is a pathway for data , as data in stream travel in byte-to-byte format. The stream carries the data from source to destination .
On a simple note suppose you want to go to a market from your home, it is obvious that you'll travel through the road.Here, "road" acts as a stream.
So when you use Iostream it facilitates the functioning of input and output of data, suppose you use 'cout',here the output stream will work as a path through which your data will travel to the console output screen .