Acetic acid is a weak acid that forms a salt with a strong base, NaOH. What kind of salt will be formed?

Answer is: basic salt.

Basic salt (in this example sodium acetate CH₃COONa) is formed from the reaction between weak acid (in this example cacetic acid CH₃COOH) and strong base (in this example sodium acetate NaOH).

Balanced chemical reaction of acetic acid and sodium hydroxide:

CH₃COOH (aq) + NaOH (aq) → CH₃COONa (aq) + H₂O (l).

Neutralization is is reaction in which an acid (in this example vinegar or acetic acid CH₃COOH) and a base (in this example soda or some other base) react quantitatively with each other.