Engineering Manager System Design Interview Questions

Gk K. - " can we use blomfilters to check existing usernames? and if both are creating at a time, like both are choosing some abcd , here system checks whether user with that name exists or not. so while checking , it will add an entry on redis (example) with this name as key and obtain lock using some distributed lock. , it will lock on that name. (like seat booking in bookmyshow) with some TTL value. so this check will happen once user enters his interest username and also while submit .. 2 times che"See full answer

Sourabh G. - "Functional Requirement Monitor health, metrics Alert in case of failure/anomaly Visualize the live health Analyse machines on periodic basis Non Functional Should not exert load on machines low latency Highly scalable Logs/Metrics Gathering push - machine gather and send to system and low priority background thread along with batching pull - heart beat check (for offline machines) Processing Real time streaming using Kafka/kinesis + Flink TimeSeries database for stor"See full answer

Adrian V. - "What about sharding by Real Estate companies that are listing the homes? Because the homes can span zip codes. Then further shard by zip codes?"See full answer

Faraz A. - "Describe basics of web browser and http request. Then go into Google's search engine. For follow-up questions, talked about http vs https (encryption), sql vs nosql data store, s3 blob storage, encryption policies, retention policies."See full answer

S R. - "Did pretty ok. Gathered requirements, back of the envelope calculations and drew out the typical system design with details of components. Dug in deep into each box and probed around why it was needed."See full answer

shg - "(This was not search autocomplete based on prefix matching question.) First of all, please note :- The interviewer is not expecting you to get to the right answer in just 1 hr. These systems have been designed over months and improved over years and its impractical for anyone to expect you to get to the right answer in 1 hr. (There is no one single right answer). At the end, the interviewer (director level person) told me the same. What they are looking for is your thought process, getting from"See full answer

Develop games G. - "asdsad"See full answer

Anonymous - "Functional requirements: (a) location tracking (b) check-in at nearby place (c) view historical checkins with how much time user stayed there (d) Mark checkout when out of proximity (e) analytics - checkins by user at given loc, top n places Out of scope: (a) checkin sharing with followers Non functional: (a) low latency (b) high availability (c) eventual consistency Scale: (a) QPS: 10M DAU * 2 checkins /86400 seconds (b) Yearly Data Volume: 10M* 0.1 KB *365 days HLD: user -> location servic"See full answer

gdecuri - "Load Balancer to multiple API Servers, pub sub system to publish user events, Game Engine Service, Write through cache and NoSQL DB. HTTP Long Polling to get user status updates"See full answer

Vishwanshi J. - "Summary of the Situation We'll design a video streaming app for toddlers, focusing primarily on creating a safe, engaging, and educational environment. The goal is to foster early learning and provide entertainment that's appropriate for this age group. This will be a brand-new app, designed to use existing hardware like tablets and smartphones that are common in households with young children. Identify Users Primary Users: Toddlers (ages 1-4): direct consumers of the content. Seco"See full answer