System Design Interview Questions

gdecuri - "Load Balancer, Multiple API Servers, game Service, pub-sub system, HTTP Long Polling for status updates, write-through cache. No SQL DB to store user, game, and move information."See full answer

Linying W. - "Very helpful! But I have a question: the location of drivers can be changing every minute, so won't reading from location cache returning stale data?"See full answer

M D. - "Understand the business problem: Identify the business problem that the AI data product is intended to solve. Identify the target audience: Understand who will be using the data and what problem they will be solving for using the data. This will inform the features and functionality that should be included in the product. Gather and preprocess the data: Collect and preprocess the data that is relevant to the problem that it is being solved for. This will inform the AI algorithm"See full answer

Pathworks P. - "To answer this, I will focus my efforts on explaining the most common type of API used in most modern software development applications - the REST API. For the purpose of simplicity, I will also keep the topics of Authorization and Authentication out of the mix. In essence, an API is a group of logic that takes in a specific set of inputs and responds with a specific set of outputs. This is analogous to going to a drive-thru and placing an order for a meal. When you give an API a bunch of"See full answer

Krishnan S. - "Excellent job Roshan, really liked the explanation. Which software were you using to explain the system design diagrams?"See full answer

Anup S. - "1 Billion Matches per day is it over sized ?"See full answer

GalacticInterviewer - "I first clarified what he needed for the leaderboard meaning did he need a gaming leaderboard system, a stock market leaderboard system where the trades placed would be ranked in terms of values or a coding platform leaderboard where the users are ranked as per the points earned by solving the problem? He answered that he wanted a multipurpose leaderboard system He was specifically interested in the design of the api part Explained him that assuming we had a flask api there would be a get re"See full answer

Hyder A. - "Control plane has few component, it's like the brain of the cluster, the data plane is the work horse, CP has etcd, api-server, DP has kublet and kube-proxy"See full answer

Anonymous Stork - "You are working on a SaaS product that currently uses Basic Authentication (username/password) for API and application access. The security and compliance teams have mandated moving to a more secure, modern authentication mechanism — OIDC (OpenID Connect). Design the authentication system migration from Basic Authentication to OIDC. Discuss the architecture changes, the migration approach, and the rollout strategy. What are the technical challenges, impacts on customers, backward compatibility"See full answer

Rjj - "I tried solving this question and here is the recorded video for the entire solution - https://youtu.be/G_LIbTp58XA Feel free to comment here or on the video for further discussion."See full answer

Praveen - "I will start with discussing the Google mission statement, which is to organize the world's information and make it easily accessible to everyone to help them get things done, and make their day a bit easier. I will think about building something that will leapfrog this mission. Google has already organized all of the world's public digital information in the current state. There are opportunities to get more information into a digital form. But there are also significant improvements in mak"See full answer

Srinivasa R. - "Any more details about this can make it easy"See full answer