![]() How many entry and exit points will be needed, and for what types of vehicles?.Is this a multiple floor parking garage or a single level parking lot?.Consider: does the final design address the bottlenecks you’ve identified? Does it meet the goals you discussed at the beginning of the interview? Do you have any questions for the interviewer?įor a full answer to this question, take a look at the video guide below from Success In Tech or this text guide from donnemartin on GitHub.Components that you could dive into: how a user views the home timeline or posts a tweet, the intricacies of the database design, etc.Potential bottlenecks: adding a load balancer with multiple web servers, scalability issues, fanout service slowing down tweets and etc.High-level components: write, read, and search APIs types of databases SQL vs NoSQL etc.Back-of-the-envelope calculations: average KBs per tweet, size of new tweet content per month, read requests and tweets per second, etc.What are your assumptions? (traffic distribution, number of active users and tweets, read vs write-heavy).What are the constraints of the system?.Is the interviewer looking for a design of the core features, or a high-level overview of the whole service?.Here are some considerations for answering this question: How would you design a social media app?įor this question you'll typically be asked to design a specific app, such as Twitter, Instagram, etc. For this example, we’ll assume the interviewer asked you to design Twitter. How would you design a ride-hailing / delivery app.How would you design an e-commerce store.How would you design an online file-sharing system. ![]() How would you design autocomplete for a search engine?.How would you design a URL-shortening service?.How would you design a social media app?.The 11 questions below were the most common out of over 350 system design interview questions that we collected, and they're listed roughly in order of frequency below (note: we've just made minor edits to the phrasing). How to prepare for system design interviewsĬlick here to practice system design interviews 1-on-1 with an ex-FAANG interviewer System design interview questions.More system design questions (by company).We identified these questions by analyzing a dataset of over 300 Glassdoor interview reports that were posted by software engineers, engineering managers, and technical program managers.Īnd the first thing you'll want to know is which of these questions are the most common. Below is a list of 59 confirmed system design interview questions that were asked at Google, Amazon, Facebook, or Microsoft.
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