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Python: Which practice avoids a common mistake with Lambda, map, and filter?

Difficulty:

Medium

Questions:

1

Time Limit:

2 minutes

Passing Score:

100%

Question

Which practice avoids a common mistake with Lambda, map, and filter?

  1. Ignore the Lambda, map, and filter issue and rely on team discipline instead of clearer APIs or invariants.
  2. Silence the Lambda, map, and filter problem by using broad catches, hidden globals, or extra shared mutable state.
  3. Prefer the version of Lambda, map, and filter that makes behavior less predictable as long as the code still runs.
  4. Do not force business-critical logic into nested lambdas when a named helper or comprehension would be easier to test and explain.

Hint

Look for the option that protects correctness instead of hiding the problem.

Answer and rationale

Correct answer: D. Do not force business-critical logic into nested lambdas when a named helper or comprehension would be easier to test and explain.

Do not force business-critical logic into nested lambdas when a named helper or comprehension would be easier to test and explain. This is a common failure mode in real Python code and a frequent interview follow-up.

Track: Python