Returning JSON with JsonResponse in Django - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ component_behavior

intermediate

What is the output of this Django view using JsonResponse?

Consider this Django view function. What JSON response will the client receive?

Django

from django.http import JsonResponse

def sample_view(request):
    data = {'name': 'Alice', 'age': 30}
    return JsonResponse(data)

A {"name": "Alice", "age": 30}

B "{'name': 'Alice', 'age': 30}"

C {"name": "Alice", "age": "30"}

D {"name": "Alice"}

💡 Hint

JsonResponse converts the dictionary to JSON with correct types.

JsonResponse converts the Python dictionary to a JSON string with proper JSON syntax and types. Numbers remain numbers, strings remain strings.

📝 Syntax

intermediate

Which option will cause a TypeError when returning JsonResponse?

Which of these Django view return statements will raise a TypeError?

Django

from django.http import JsonResponse

def view(request):
    # return statement here

A return JsonResponse('hello world')

B return JsonResponse({'fruits': ['apple', 'banana']})

C return JsonResponse({'count': 5})

D return JsonResponse({'valid': True})

💡 Hint

JsonResponse expects a dictionary or list, not a plain string.

Passing a plain string to JsonResponse causes a TypeError because it expects a dict or list to convert to JSON.

❓ state_output

advanced

What is the Content-Type header of this JsonResponse?

Given this Django view, what is the Content-Type header sent in the HTTP response?

Django

from django.http import JsonResponse

def view(request):
    return JsonResponse({'status': 'ok'})

A text/html

B application/json

C application/javascript

D text/plain

💡 Hint

JsonResponse sets the content type for JSON data.

JsonResponse automatically sets the Content-Type header to 'application/json' to indicate JSON data.

🔧 Debug

advanced

Why does this JsonResponse return an empty JSON object?

This Django view returns an empty JSON object {} instead of the expected data. Why?

Django

from django.http import JsonResponse

def view(request):
    data = {'count': 10}
    return JsonResponse(data, safe=False)

A safe=False allows non-dict data, but data is a dict, so it returns empty

B safe=False disables validation, but data is dict so it returns correctly

C safe=False is required only for non-dict data; here it has no effect

D safe=False causes JsonResponse to ignore data and return empty object

💡 Hint

safe=False is for allowing non-dict data like lists.

The safe parameter when False allows non-dict data like lists. Since data is a dict, safe=False has no effect and the data is returned correctly.

🧠 Conceptual

expert

Which option correctly returns a JSON list with JsonResponse?

You want to return a JSON list ['red', 'green', 'blue'] from a Django view using JsonResponse. Which return statement is correct?

Django

from django.http import JsonResponse

def colors_view(request):
    colors = ['red', 'green', 'blue']
    # return statement here

A return JsonResponse(colors)

B return JsonResponse(colors, safe=True)

C return JsonResponse({'colors': colors})

D return JsonResponse(colors, safe=False)

💡 Hint

JsonResponse requires safe=False to return non-dict data like lists.

By default, JsonResponse expects a dictionary. To return a list, safe must be set to False.