This document outlines an assignment to write a program that replaces multiple spaces in a string with a single space. It provides examples of input strings like "Welcome to Emertxe" and the expected output. It also describes the algorithm to check if the next character is a space when a space or tab is encountered, and to swap elements back one position if so. Pre-requisites like functions, pointers, arrays are listed, with the objective being to understand these concepts.