Problem Details (RFC 7807) format in Rest API - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

What is the output of this RFC 7807 JSON example?

Given this JSON response following RFC 7807, what is the value of the title field?

Rest API

{
  "type": "https://example.com/probs/out-of-credit",
  "title": "You do not have enough credit.",
  "status": 403,
  "detail": "Your current balance is 30, but that costs 50.",
  "instance": "/account/12345/msgs/abc"
}

A Your current balance is 30, but that costs 50.

B https://example.com/probs/out-of-credit

C /account/12345/msgs/abc

D You do not have enough credit.

💡 Hint

Look for the title key in the JSON object.

The title field in RFC 7807 provides a short, human-readable summary of the problem type. Here, it is "You do not have enough credit."

🧠 Conceptual

intermediate

Which field in RFC 7807 is used to uniquely identify the specific occurrence of the problem?

In the Problem Details JSON format, which field uniquely identifies the specific occurrence of the problem?

A instance

B title

C type

D status

💡 Hint

It is a URI reference that identifies the specific occurrence.

The instance field is a URI reference that identifies the specific occurrence of the problem, allowing clients to distinguish between different occurrences.

❓ Predict Output

advanced

What HTTP status code is represented in this RFC 7807 response?

Given this JSON snippet, what is the HTTP status code indicated?

Rest API

{
  "type": "https://example.com/probs/invalid-input",
  "title": "Invalid input provided.",
  "status": 422,
  "detail": "The 'email' field must be a valid email address.",
  "instance": "/users/abc123"
}

A 400

B 422

C 500

D 404

💡 Hint

Check the status field in the JSON.

The status field indicates the HTTP status code. Here it is 422, which means Unprocessable Entity.

❓ Predict Output

advanced

What is the output of this Python code parsing an RFC 7807 response?

Consider this Python code that parses an RFC 7807 JSON response. What does it print?

Rest API

import json

response = '''{
  "type": "https://example.com/probs/out-of-credit",
  "title": "You do not have enough credit.",
  "status": 403,
  "detail": "Your current balance is 30, but that costs 50.",
  "instance": "/account/12345/msgs/abc"
}'''

problem = json.loads(response)
print(problem.get('detail'))

A https://example.com/probs/out-of-credit

B You do not have enough credit.

C Your current balance is 30, but that costs 50.

D /account/12345/msgs/abc

💡 Hint

Look at the key used in problem.get().

The code prints the value of the detail key, which is "Your current balance is 30, but that costs 50."

🧠 Conceptual

expert

Which statement about the 'type' field in RFC 7807 is correct?

Choose the correct statement about the type field in the Problem Details (RFC 7807) format.

A It is a URI that identifies the problem type and should always be dereferenceable to human-readable documentation.

B It is a short human-readable summary of the problem type.

C It is a URI reference that identifies the specific occurrence of the problem.

D It is the HTTP status code associated with the problem.

💡 Hint

Think about the purpose of the type field as defined in RFC 7807.

The type field is a URI that identifies the problem type. It is recommended to be dereferenceable to human-readable documentation, but it is not mandatory. It helps clients understand the kind of problem.