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MetaProduct SenseHard~25 min
WhatsApp Spam Detection
Duration
~25 minutes
Difficulty
Hard
WhatsApp is seeing a surge in spam messages across both individual and group chats. You've been asked to design a spam detection system. The catch: WhatsApp is end-to-end encrypted, which limits what data you can use.
Skills tested
System designPrivacy-constrained MLPrecision/recall tradeoffsMeasurement
Interview stages
- 1Design the system
- 2Precision vs. recall
- 3Measure effectiveness
- 4Encryption constraints
What you'll get back
After the session, you'll receive a detailed AI-generated debrief with stage-by-stage ratings (Strong / Developing / Weak), a signal coverage map showing which key points you hit, specific feedback on your reasoning and communication, and a reference response for comparison.
$3
One-time payment · No account required
- ~25 minute AI-powered mock interview
- Realistic interviewer pushback
- Stage-by-stage debrief with ratings
- Signal coverage map
- Reference response for comparison
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