Estimation practice for System Design interviews

One drop.
One match.

Read the problem above the board. Steer the block to the answer to “Find”. Both the number and the unit have to match. Got it wrong? The game stops for a review and goes on when you are ready.

RPS · traffic · storage · cache · replicas · shards · bits and bytes

Very slow. Count at your own pace.

What the problems cover

Load: average and peak RPS, requests per hour, cache misses, the share of writes.
Traffic: API egress, MB/s to Gb/s, snapshot transfer time.
Storage: photos per day, log retention, replicas, cache memory, a day of events, data per shard.
Capacity: how many servers survive the peak, how many requests are in flight.

Estimation practice for System Design interviews

One drop.One match.

One drop.
One match.