The estimation question has real-world uses from figuring out market size to even large project effort estimation. Interviewer is looking to see if the candid

The estimation question has real-world uses from figuring out market size to even large project effort estimation. Interviewer is looking to see if the candidate can break part a hard problem into smaller solvable sizes. A famous example is when Fermi estimated the size of atomic explosion by dropping pieces of paper during the blast. https://www.quora.com/How-did-Fermi-estimate-the-power-of-the-Trinity-bomb https://www.quora.com/How-did-Fermi-estimate-the-power-of-th...