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Interview question · Mobile Application Security

How do you reverse engineer an Android or iOS app in an authorised assessment, and what does obfuscation change?

Unzip, decompile, read the manifest, then watch it run. The interview checks whether you know where the interesting parts of an app hide, and that obfuscation changes your effort, not your conclusions.

mediumEssentialNewPreparation tags: Google, Apple, MetaUpdated Nov 2026

Unzip, decompile, read the manifest, then watch it run. The interview checks whether you know where the interesting parts of an app hide, and that obfuscation changes your effort, not your conclusions.

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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

You are scoping an authorised reverse-engineering review of a fintech Android app before launch.

  1. What does static analysis involve?
  2. What should static review look for?
  3. What does dynamic analysis add?
  4. How do you keep the review in scope?
  5. What should the findings focus on?
  6. How would you scope and run the review?

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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