urlpatterns list structure in Django - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ component_behavior

intermediate

What does this urlpatterns list do?

Given this Django urlpatterns list, what URL path will trigger the home_view function?

Django

from django.urls import path
from .views import home_view

urlpatterns = [
    path('', home_view, name='home'),
    path('about/', lambda request: None, name='about'),
]

A The root URL path '/' triggers home_view

B No URL triggers home_view

C The URL path '/home/' triggers home_view

D The URL path '/about/' triggers home_view

💡 Hint

Look at the first path's first argument, it defines the URL pattern.

The empty string '' in path means the root URL. So '/' triggers home_view.

📝 Syntax

intermediate

Which urlpatterns list is syntactically correct?

Select the urlpatterns list that will NOT cause a syntax error in Django.

A urlpatterns = {path('home/', home_view), path('about/', about_view)}

B urlpatterns = [path('home/', home_view), path('about/', about_view)]

C urlpatterns = (path('home/', home_view), path('about/', about_view))

D urlpatterns = path('home/', home_view), path('about/', about_view)

💡 Hint

urlpatterns must be a list, not a set or tuple.

urlpatterns must be a list of path() calls. Option B uses a list [].

❓ state_output

advanced

How many URL patterns are in this urlpatterns list?

Count the number of URL patterns defined in this urlpatterns list.

Django

from django.urls import path, include

urlpatterns = [
    path('blog/', include('blog.urls')),
    path('shop/', include('shop.urls')),
    path('contact/', lambda request: None),
]

A 1

B 2

C 0

D 3

💡 Hint

Each path() call counts as one URL pattern.

There are three path() calls, so 3 URL patterns.

🔧 Debug

advanced

What error does this urlpatterns list cause?

Identify the error caused by this urlpatterns list.

Django

from django.urls import path

urlpatterns = [
    path('home/', home_view),
    path('about/', about_view),
    path('contact/', contact_view)
]

A TypeError because path() arguments are wrong

B No error, code runs fine

C NameError because home_view is not defined

D SyntaxError due to missing closing parenthesis

💡 Hint

Check the parentheses in the last path() call.

home_view, about_view, and contact_view are not defined, causing NameError.

🧠 Conceptual

expert

What is the effect of including another URLconf in urlpatterns?

In Django, what happens when you use path('blog/', include('blog.urls')) in urlpatterns?

A It adds all URL patterns from blog.urls under the 'blog/' path prefix

B It replaces the current urlpatterns with blog.urls

C It causes a runtime error because include() cannot be used in urlpatterns

D It creates a redirect from 'blog/' to blog.urls

💡 Hint

Think about how include() helps organize URLs.

include() adds all URL patterns from the specified module under the given prefix.