Resource identifiers in URLs in Rest API - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

What is the output of this URL parsing code?

Given the URL https://api.example.com/users/42/orders/7, what is the value of the resource identifier for the order?

Rest API

url = 'https://api.example.com/users/42/orders/7'
parts = url.split('/')
order_id = parts[-1]
print(order_id)

A 42

B orders

C users

D 7

💡 Hint

Look at the last part of the URL after splitting by '/'.

The URL is split by '/', so the last part is the order ID '7'.

🧠 Conceptual

intermediate

Which URL correctly identifies a single user resource?

Which of the following URLs correctly identifies a single user resource in a REST API?

A https://api.example.com/users?id=123

B https://api.example.com/users/123

C https://api.example.com/users/all

D https://api.example.com/users/123/orders

💡 Hint

Single resource URLs usually have the resource type followed by its unique ID.

URL 'https://api.example.com/users/123' points directly to user with ID 123.

🔧 Debug

advanced

Why does this URL cause a 404 error?

Given the REST API endpoint /products/{productId}, why does the URL /products/ cause a 404 error?

A Because the productId is missing in the URL path

B Because the HTTP method is incorrect

C Because the server does not support trailing slashes

D Because the query parameters are malformed

💡 Hint

Check if the URL includes the required resource identifier.

The endpoint requires a productId after /products/. Without it, the server cannot find the resource.

📝 Syntax

advanced

Which URL pattern correctly uses resource identifiers for nested resources?

Which URL correctly represents accessing order 55 for user 10?

A /users/10/orders/55

B /orders/55/users/10

C /users/orders/10/55

D /orders/users/10/55

💡 Hint

Nested resources usually follow the pattern: parent resource, parent ID, child resource, child ID.

The correct pattern is /users/10/orders/55 where 10 is user ID and 55 is order ID.

🚀 Application

expert

How many resource identifiers are in this URL?

Count the number of resource identifiers in the URL https://api.example.com/companies/5/departments/3/employees/42.

A 1

B 2

C 3

D 4

💡 Hint

Resource identifiers are the numeric parts that identify specific resources.

The URL has three resource identifiers: 5 (company), 3 (department), and 42 (employee).