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Interview question · Application & API Security

What does each of SAST, DAST, SCA and fuzzing find, and what does each miss?

Each tool sees the application from a different angle and has a blind spot where another looks. The scored answer maps bug classes to tools and builds a pipeline that does not drown developers.

mediumNewPreparation tags: Google, Microsoft, AmazonUpdated Nov 2026

Each tool sees the application from a different angle and has a blind spot where another looks. The scored answer maps bug classes to tools and builds a pipeline that does not drown developers.

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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

A team asks which application security testing tools they should run on a web service with a C parsing library and many dependencies.

  1. What does SAST do well and badly?
  2. What does DAST add?
  3. What does SCA add?
  4. Where does fuzzing fit?
  5. What do none of these find well?
  6. What testing programme would you recommend?

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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