Apple interview practice: 1 mock round across 1 role.

A system design deep-dive where you both whiteboard a multi-device sync architecture and implement its core reconciliation primitive. Privacy and battery constraints break standard cloud designs, so Sarah, a Staff Engineer at Apple, pushes you on zero-knowledge indexing and CRDTs under network partitions — then asks you to write the merge that converges across devices. You walk away with a transcript-backed scorecard naming the exact trade-off you could not justify.