Practice

Prepare for Amazon

The problems worth doing for this kind of loop — grouped by what the round tests, not by leaked question lists.

20 problemsClear filters

Practice problems, with your status, difficulty and topics
StatusProblemFormatLevel
Not startedDesign a chat serviceconsistencydistributed-systemshldsystem-designWrittenhard
Not startedDesign a collaborative document editorconsistencydistributed-systemshldsystem-designWrittenhard
Not startedDesign a distributed job schedulerdistributed-systemshldreliabilitysystem-designWrittenhard
Not startedDesign a distributed key-value storeconsistencydistributed-systemshldsystem-designWrittenhard
Not startedDesign a distributed rate limiterdistributed-systemsrate-limitingsystem-designWrittenhard
Not startedDesign a file sync serviceconsistencyhldstoragesystem-designWrittenhard
Not startedDesign a metrics and monitoring systemhldreliabilitystoragesystem-designWrittenhard
Not startedDesign a news feedcachingdistributed-systemshldsystem-designWrittenhard
Not startedDesign a payment system and ledgerconsistencyhldreliabilitysystem-designWrittenhard
Not startedDesign a post and follow-graph serviceconsistencydistributed-systemshldsystem-designWrittenhard
Not startedDesign a ride-matching servicedistributed-systemshldstoragesystem-designWrittenhard
Not startedDesign a ticket booking systemconcurrencyconsistencyhldsystem-designWrittenhard
Not startedDesign a video streaming servicecachinghldqueuessystem-designWrittenhard
Not startedDesign a web crawlerdistributed-systemshldstoragesystem-designWrittenhard
Not startedDesign an ad click aggregation pipelineconsistencyhldqueuessystem-designWrittenhard
Not startedDesign an object storage servicehldreliabilitystoragesystem-designWrittenhard
Not startedFewest machines to finish by a deadlinebinary-searchgreedyoptimisationWrittenhard
Not startedWas double-checked locking ever actually broken?c++concurrencymemory-modelsingletonWrittenhard
Not startedWhat is the hardest technical problem you have solved?behavioralstartechnical-depthWrittenhard
Not startedWhy is this query slow?indexingperformancequery-planningsqlWrittenhard