Easy everything in Backend Dev, page 15
Entity-Relationship Diagrams: A Blueprint for Your Data
An Entity-Relationship Diagram (ERD) is a blueprint for a database, showing what you're storing and how it connects. It's used before writing code to design a relational database schema. The main footgun is designing the model to match the UI, not the data.
Primary Keys: The Unique ID for Every Row
A primary key is like a social security number for a database row, uniquely identifying it. It's used to reliably fetch records and link related data across tables. The footgun is using a natural key, like an email address, that might change over time.
DBMS: The Software That Runs Your Database
A DBMS is the software engine that manages a database, separating your app from raw data files. You use it to query, update, and administer data, like with PostgreSQL or MySQL. The common footgun is confusing the DBMS with the database itself.
Top 10 FastAPI interview questions for senior roles
FastAPI interview questions rarely test syntax. They probe whether you understand its three pillars: ASGI powered async concurrency, Pydantic validation at the request boundary, and the Depends dependency injection graph that wires services together.
We are hiring for this. Every open role lists the topics its interview covers, so you can prepare for the real thing rather than guessing.
See open roles