200-901 Question 45
Single answerA developer is working with an API that manages user accounts. They attempt to send a POST request to create a new user account, but receive an HTTP 409 response code. Based on the API documentation, this response indicates that the username is already in use. What is the most appropriate next step to resolve this issue?
- A
Send a GET request to verify if the username already exists before attempting to create a new account.
- B
Modify the POST request to include additional headers for user authentication.
- C
Retry the POST request with the same username to see if the issue resolves itself.
- D
Check the API endpoint URL for typos and resubmit the request.
Show answer and explanation
Correct answer: A
Explanation
An HTTP 409 Conflict response indicates that the server could not complete the request due to a conflict with the current state of the resource. In this scenario, the conflict arises because the username already exists. The best resolution is to verify the existence of the username using a GET request before attempting to create a new account.
- A. Correct.
This is the correct approach. A 409 Conflict response indicates a resource conflict (in this case, the username already exists). Checking if the username already exists before creating a new account is an appropriate troubleshooting step.
- B. Incorrect.
Adding additional headers for authentication is not relevant to resolving a 409 Conflict response, as the issue relates to resource availability (username) rather than authentication.
- C. Incorrect.
Retrying the request with the same username will not resolve the issue, as the conflict is due to the username being already in use. The request needs to use a different username.
- D. Incorrect.
A typo in the API endpoint URL would typically result in a 404 Not Found or a 400 Bad Request error, not a 409 Conflict. This option is unrelated to the problem.