Functions · interview question
Which option describes the most likely pitfall around return values?
Multiple choiceMediumchapter-2-curatedpremiumfunctionsreturn-values
Answer and explanation
Correct answer
C. Mutating external state for everything makes the control flow harder to test and harder to explain.
Why
Mutating external state for everything makes the control flow harder to test and harder to explain. Calling out that risk matters because clear return values are a sign that you understand how information flows through the program.
Test yourself on Functions
A free test with instant, explained results. No account needed.
More Functions questions
- What does a strong engineer do when reasoning through return values code?
- Which judgment is strongest when choosing a data shape for return values?
- When is return values being used in the wrong way?
- What does a strong engineer do when reasoning through function extraction code?
- A teammate submits shaky function extraction code. Which review comment is the strongest?
- What is the healthiest performance judgment around function extraction?