Complete for freeIntermediateBrowser simulator included

Course 11

Databases, APIs, and Backend Development

Build a validated database-backed web API using HTTP, REST, JSON, Python routes, relational SQL, authentication basics, and useful errors. The course combines structured lessons, guided browser concept simulations, and learner-created project files made with freely installable or open tools described in the course instructions. This guided page does not execute code, train models, run databases, create repositories, access hardware, or provide hosted infrastructure.

Free completion promise: The always-free pathway combines HTTP and data concept simulations with learner-created API, SQL, and test files made in freely installable or open tools. The C4T page does not run servers, SQL, or tests.

Before you begin

Requirements & setup for Databases, APIs, and Backend Development

Start with the complete free pathway below. Hardware, subscriptions, paid APIs, and cloud credits are never required.

Start here · free path

Your complete $0 setup

$0 required

Setup checklist

0 of 6 complete

This checklist is a temporary setup aid and resets when the page reloads. Saved course progress begins in the setup lessons below.

1. Choose the free learning path
Use the browser-based tools and simulations throughout this course. Paid software, APIs, cloud credits, GPUs, and physical equipment are optional.
About 2 min
2. Set up C4T Local API and SQL Concept Simulator
Open the concept simulator and read its scenario, assumptions, and limitations.
About 5 minOpen C4T Local API and SQL Concept Simulator (opens in a new tab)
3. C4T Local API and SQL Concept Simulator: step 2
Make a prediction, adjust the available controls, and compare the result with the explanation.
About 5 min
4. C4T Local API and SQL Concept Simulator: step 3
Record what changed and why; repeat with at least one different input.
About 5 min
5. C4T Local API and SQL Concept Simulator: step 4
For applied work, follow the course instructions to create and keep your own project files with a freely installable or open tool appropriate to the subject.
About 5 min
6. Run the setup check
C4T Local API and SQL Concept Simulator: Complete one prediction-and-explanation cycle and record the evidence you would carry into a learner-created project file.
About 5 min

Software

1 item

C4T Local API and SQL Concept Simulator

Course need

C4T Local API and SQL Concept Simulator

Free

A free browser concept simulator with adjustable values, a prediction prompt, deterministic feedback, and a short explanatory trace. This guided page does not execute code, train models, run databases, create repositories, access hardware, or provide hosted infrastructure. Use keyboard controls and the text trace or written alternative when a visual or pointer interaction is not suitable.

Open the concept simulator and read its scenario, assumptions, and limitations.
Make a prediction, adjust the available controls, and compare the result with the explanation.
Record what changed and why; repeat with at least one different input.
For applied work, follow the course instructions to create and keep your own project files with a freely installable or open tool appropriate to the subject.

Open C4T Local API and SQL Concept Simulator

Hardware

Nothing required

No physical hardware is needed for this course.

Accounts

Nothing required

No external account is needed for this course.

What you will be able to do

Learning outcomes

Explain client-server exchanges and construct correct HTTP requests.
Design REST routes and structured JSON responses.
Model relational data and write safe SQL queries.
Deliver a validated, protected, tested database-backed application.

Included downloads

Free starter assets

Original · synthetic · licensed

These small files contain no personal data, credentials, or secrets. Dataset fixtures are CC0 and starter code is MIT licensed.

Starter pack guide & licensesSee what each original synthetic dataset, fixture, and starter file contains.SQLite practice databaseOriginal schema, synthetic seed rows, constraints, and review queries.

Build real work

Assignments & capstone

Free tools accepted

Relational API design

Design tables, relationships, routes, sample JSON, validation rules, and status behavior for a small service.

The always-free pathway combines HTTP and data concept simulations with learner-created API, SQL, and test files made in freely installable or open tools. The C4T page does not run servers, SQL, or tests. Submit a project file, text trace, screenshots with descriptions, or equivalent simulator evidence.

Protected CRUD feature

Implement and test create, read, update, and delete behavior with protected actions and helpful failures.

Final assessment

Database-backed web application

Build a browser application with a documented API, CRUD operations, relational data, validation, protected actions, error handling, and automated API tests. Deliverables: Relational schema and seed data, Documented REST API, Protected validated CRUD behavior, Browser interface with complete states, and Automated API tests.

Prerequisites & pacing

Skills assumed

Python functions
HTML/CSS
JavaScript events and fetch

Recommended prior courses

These are advisory, not locks. If you already have the skills listed above, enroll directly.

Choose your pace

self paced: 10 weeks at 5 hours per week
weekly: 10 weeks at 5 hours per week

Part of these learning paths

🌐 Web and Software Development · step 4 of 4
Build accessible websites, add interactivity, collaborate with Git, and back it all with an API.
🛠️ Agentic Systems · step 2 of 5
Build tool-using AI agents that are auditable, permission-bounded, and evaluated against adversaries.

Course created by Zafir Shamsi.