Where to store access and refresh tokens in a mobile app and on the web?
Middle
223
System Analyst
2735
0
How does SSO (Single Sign-On) work?
Middle
215
Describe the architecture of a server that handles user setting update requests.
Middle
208
Which is easier: splitting a monolith into microservices or combining several microservices into one?
Middle
196
What is the difference between an array of objects and an object with arrays? When should each be used?
Middle
191
How does OAuth 2.0 work? Describe the authorization flow through Google on a third-party site.
Middle
188
We have 50 million users, 10% log in daily. How to handle such a load on the database?
Middle
176
How well do you know Android and iOS UI? Guidelines, behavior descriptions for developers, differences between platforms?
Middle
167
How can you see what is happening under the hood during an HTTP request, especially if something goes wrong?
Middle
159
What is the difference between a logical data schema and a physical one?
Middle
159
How can you speed up the SQL query SELECT FROM user_settings WHERE user_id = ? with 50 million users?
Middle
156
What happens with HTTP methods idempotency: what occurs on double invocation of POST and double invocation of PUT with the same request?
Middle
154
How does the browser find out the server's IP address when entering yandex.ru? How does the request physically reach the server?
Middle
151
Tell more about HTTP 400 errors: what are they for, and what should be the reaction to them?
Middle
151
How does the server verify a JWT token? How to protect against token content substitution?
Middle
148
Describe the settings screen with toggles, inputs, dates, and avatar — how would you describe it to developers?
Middle
145
How did you determine the number of microservices (10 pieces)? What principle did you use for splitting?
Middle
133
Why is Redis used? What happens if Redis crashes? Cache update policies? Why is Redis faster than PostgreSQL?
Middle
132
Describe the ERD for the user settings screen. How should settings be stored — as separate fields or otherwise?
Middle
128