Why file operations are common in FastAPI - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the FastAPI class.

FastAPI

from fastapi import [1]
app = [1]()

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

AFastAPI

BRequest

CResponse

DFile

Attempts:

3 left

💡 Hint

Common Mistakes

Importing Request or Response instead of FastAPI.

Trying to import File here.

The FastAPI class is imported to create the app instance.

2fill in blank

medium

Complete the code to define a POST endpoint that accepts a file upload.

FastAPI

@app.post("/upload")
async def upload_file(file: [1]):
    content = await file.read()
    return {"size": len(content)}

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Astr

BUploadFile

CFile

Dint

Attempts:

3 left

💡 Hint

Common Mistakes

Using File instead of UploadFile as the parameter type.

Using str or int which are not file types.

UploadFile is used in FastAPI to handle file uploads asynchronously.

3fill in blank

hard

Fix the error in the import statement to handle file uploads.

FastAPI

from fastapi import [1]
from fastapi import UploadFile, File

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ARequest

BFile

CFastAPI

DDepends

Attempts:

3 left

💡 Hint

Common Mistakes

Importing File twice or missing FastAPI import.

Confusing Request with FastAPI.

FastAPI must be imported to create the app instance; UploadFile and File are imported separately.

4fill in blank

hard

Fill both blanks to save the uploaded file content to disk.

FastAPI

async def save_file(file: UploadFile):
    content = await file.[1]()
    with open("uploaded_file", [2]) as f:
        f.write(content)

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Aread

Bwrite

C"wb"

D"r"

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'write' method on UploadFile which does not exist.

Opening file in read mode instead of write mode.

We read the file content asynchronously, then open a file in binary write mode to save it.

5fill in blank

hard

Fill all three blanks to create a FastAPI endpoint that saves an uploaded file and returns its size.

FastAPI

@app.post("/save")
async def save_upload(file: [1] = [2](...)):
    content = await file.[3]()
    with open("saved_file", "wb") as f:
        f.write(content)
    return {"size": len(content)}

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

AUploadFile

BFile

Cread

Dstr

Attempts:

3 left

💡 Hint

Common Mistakes

Using str instead of UploadFile for file parameter.

Missing File() dependency declaration.

Using write() instead of read() on UploadFile.

The endpoint uses UploadFile type with File() to accept uploads, reads content asynchronously, saves it, and returns size.