Core Collections · interview question

Which naming or modeling choice is strongest for sets?

Multiple choiceMediumchapter-3-curatedpremiumcore-collectionssets

python

seen_skus = {"SKU-1", "SKU-2"}
seen_skus.add("SKU-3")
print("SKU-2" in seen_skus)

Use names and structures that describe the business fact directly instead of temporary implementation noise.Keep sets implicit so the script stays short and hope the next engineer infers the rule.Solve the symptom with comments only and avoid changing the code shape around sets.Delay clarity until production traffic reveals the edge case and then patch it under pressure.

Answer and explanation