0 votes 0 votes what is prefix and proper prefix. please explain this by taking one example. Theory of Computation theory-of-computation + – iamdeepakji asked Oct 6, 2018 iamdeepakji 159 views answer comment Share Follow See 1 comment See all 1 1 comment reply Utkarsh Joshi commented Oct 6, 2018 reply Follow Share if "abc" is a string, null string, a, ab, abc are prefixes of the string. but abc is not a proper prefix. it is analogous to subset and a proper subset of a set. 0 votes 0 votes Please log in or register to add a comment.