Number Limits, Overflow, and roundoff (Khan Academy) - AP Computer Science Principles
Today's video discusses the difference between overflow errors and roundoff errors. Essentially, they are the same phenomenon on opposite sides of the decimal point. A number that is too large to be represented results in an overflow error. A number that has too many digits AFTER the decimal point can result in a roundoff error.
You can find this exercise set here:
https://www.khanacademy.org/computing/ap-computer-science-principles/x2d2f703b37b450a3:digital-information/x2d2f703b37b450a3:number-limits-overflow-and-roundoff/e/number-limits--overflow--and-round-off