200-901 Software Development and Design Practice Question
A developer uses the requests library to call an API. The API returns 429 Too Many Requests. What is the best practice to handle this?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use exponential backoff and retry
Implement retry with exponential backoff to respect rate limiting.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Ignore the status code and proceed
Why it's wrong here
Unreliable.
- ✗
Immediately retry the request
Why it's wrong here
Will likely get 429 again.
- ✓
Use exponential backoff and retry
Why this is correct
Standard practice.
- ✗
Wait a fixed amount of time and retry
Why it's wrong here
Not adaptive.
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Written by Johnson Ajibi, MSc IT Security
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