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MetaProduct SenseHard~25 min
WhatsApp Spam Detection
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.
Duration
~25 minutes
Difficulty
Hard
Free
Your first session · then $3 per session
- ~25 minute AI-powered mock interview
- Realistic interviewer pushback
- Stage-by-stage debrief with ratings
- Signal coverage map
- Reference response for comparison
Sign up free with Google · No card required
Skills tested
System designPrivacy-constrained MLPrecision/recall tradeoffsMeasurement
Interview stages
1
Design the system
2
Precision vs. recall
3
Measure effectiveness
4
Encryption constraints
What you'll get back
After the session, you'll get a detailed debrief: 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 to compare against.