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Interview question · Adversarial ML & Model Privacy

How would you red-team a content moderation classifier for evasion, and report results that are useful to the team that owns it?

Evasion testing is a search problem with a budget. Start from real harmful content, transform it while keeping its meaning, adapt to what gets through, and report false negatives and false positives by category.

mediumNewPreparation tags: Meta, Google, MicrosoftUpdated Nov 2026

Evasion testing is a search problem with a budget. Start from real harmful content, transform it while keeping its meaning, adapt to what gets through, and report false negatives and false positives by category.

Make your first attempt

What would you say before reading the answer?

  1. 01 State the assumptions your answer depends on.
  2. 02 Explain the mechanism and choose a control.
  3. 03 Name a condition that would change your decision.

The worked answer includes an approach, scoring criteria and follow-up questions. Compare the reasoning with your own.

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What if · the follow-ups in this answer

The answer works through 6 follow-ups like an interviewer would

You are asked to red-team a content moderation classifier that screens user posts on a social platform for several harm categories.

  1. How would you build the test set?
  2. What should you measure?
  3. What if attackers can see what is blocked?
  4. What about false positives?
  5. How do you handle harmful content in the test set?
  6. How would you report the results?

Each rung has a nudge, a model answer, the principle that carries over and the weak answer to avoid. Premium opens every answer and ladder.

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