ASGI and async-first architecture in FastAPI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define an async FastAPI route handler.

FastAPI

from fastapi import FastAPI
app = FastAPI()

@app.get("/hello")
async def hello():
    return {"message": "Hello, World!"}  # This is an [1] function

Drag options to blanks, or click blank then click option'

Aasync

Bsync

Cclass

Ddecorator

Attempts:

3 left

💡 Hint

Common Mistakes

Using a synchronous function without async keyword.

The route handler must be declared with async to support asynchronous execution in FastAPI.

2fill in blank

medium

Complete the code to await an async function inside a FastAPI route.

FastAPI

from fastapi import FastAPI
import asyncio
app = FastAPI()

async def fetch_data():
    await asyncio.sleep(1)
    return "data"

@app.get("/data")
async def get_data():
    result = [1] fetch_data()
    return {"result": result}

Drag options to blanks, or click blank then click option'

Areturn

Bawait

Cyield

Dcall

Attempts:

3 left

💡 Hint

Common Mistakes

Calling async function without await causing coroutine object return.

To get the result of an async function, you must use await inside an async function.

3fill in blank

hard

Fix the error in the FastAPI route by choosing the correct decorator for an async function.

FastAPI

from fastapi import FastAPI
app = FastAPI()

[1]("/items")
async def read_items():
    return ["item1", "item2"]

Drag options to blanks, or click blank then click option'

[e-mail]

[e-mail]

[e-mail]

[e-mail]

Attempts:

3 left

💡 Hint

Common Mistakes

Using POST or PUT decorators for read-only routes.

The route should use @app.get decorator to handle GET requests for reading items.

4fill in blank

hard

Fill both blanks to create an async FastAPI route that returns JSON with a delay.

FastAPI

from fastapi import FastAPI
import asyncio
app = FastAPI()

@app.[1]("/wait")
async def wait_and_return():
    await asyncio.[2](2)
    return {"status": "done"}

Drag options to blanks, or click blank then click option'

Aget

Bpost

Csleep

Dwait

Attempts:

3 left

💡 Hint

Common Mistakes

Using POST instead of GET for a simple wait route.

Using a non-existent asyncio.wait function.

The route uses @app.get for GET requests and asyncio.sleep to pause asynchronously.

5fill in blank

hard

Fill all three blanks to create a FastAPI async route that processes query parameters and returns a JSON response.

FastAPI

from fastapi import FastAPI, Query
app = FastAPI()

@app.get("/search")
async def search_items(q: str = [1](..., min_length=[2])):
    return {"query": q, "length": [3](q)}

Drag options to blanks, or click blank then click option'

AQuery

B3

Clen

Dstr

Attempts:

3 left

💡 Hint

Common Mistakes

Not using Query for query parameters.

Using incorrect min_length value.

Using str instead of len to get length.

Use Query to declare query parameters with validation, min_length=3 to require at least 3 characters, and len to get the length of the query string.