Sharded
0-day streakReview

Your progress

Level 1

0 XP100 XP to level 2
0day streak
0best streak
0topics started
0cards reviewed
    Review cards

    Progress is stored only in this browser. No account is required.

    16 · Design problem · hard

    Design a distributed lock

    Two workers both think they hold the lock. Who pays the merchant?

    Play the 60-second story
    0%complete
    1. 60-second story 9 cards · 1 minOne idea per card. Tap through it like stories.(done)
    2. Quick check 3 questions · 1 minTap an answer, get instant feedback.(done)
    3. Go deeper 11 min4 estimates, 2 build-up diagrams and 6 “you’re the candidate” moments.(done)
    4. Full breakdown 34 min · 13 figuresThe complete breakdown, every number and figure.(done)

    Questions this topic answers