A company's web server is configured to use a certificate issued by an internal enterprise CA. External users are reporting that they see a security warning when accessing the site. Internal users do not see the warning. What is the most likely cause of this difference?

The external users are accessing the site via a different domain name that is not covered by the certificate.

The web server is presenting a different certificate to external users than to internal users.

The external users' browsers do not trust the internal enterprise CA's root certificate.

The certificate has expired, and only internal users have a cached version of the old certificate.

A mobile app is failing to synchronize data with a backend API. The API is behind an Azure Application Gateway. The app's error log shows 'Connection timed out'. The API's backend pool is healthy, and the application gateway's health probes are passing. What is the most likely cause of the timeout?

The API's response payload is too large and is being blocked by the application gateway's request size limit.

The application gateway's backend HTTP settings have an idle timeout that is shorter than the API's processing time.

The API's DNS record is not resolving to the application gateway's public IP address.

The mobile app is using an incorrect API key, and the gateway is silently dropping the request.

A JSON configuration file contains a trailing comma after the last item in an array, causing a parse error. Which of the following is the most appropriate way to fix it?

Remove the trailing comma from the array

Add a semicolon after the array

Wrap the array in single quotes

A browser displays a warning that a website's certificate is not trusted. Which of the following is the most likely cause?

The certificate was issued by a certificate authority not in the browser's trust store

The website's server is overloaded

The website's IP address has changed

An API client is receiving a 404 Not Found error for a request that was working previously. Which of the following is the most likely cause?

The API endpoint URL has changed or is incorrect

CompTIAAutoOps+

Domain 2Objective 4

Troubleshoot Common Configuration Issues AT0-001 Practice Questions (Page 1)

Part of the System Configuration domain, which accounts for 25% of the AT0-001 exam. CompTIA does not publish an official question count, but from its 60-minute exam (~25–40 total, ~6–10 in this domain), expect 2–3 from this objective — we provide 27 practice questions to prepare you well beyond it. (estimate)

27questions here

6free pages

9concepts

25%of the exam

Questions 1–5

1application · medium
A company's web server is configured to use a certificate issued by an internal enterprise CA. External users are reporting that they see a security warning when accessing the site. Internal users do not see the warning. What is the most likely cause of this difference?
Select an answer first
2application · medium
A mobile app is failing to synchronize data with a backend API. The API is behind an Azure Application Gateway. The app's error log shows 'Connection timed out'. The API's backend pool is healthy, and the application gateway's health probes are passing. What is the most likely cause of the timeout?
Select an answer first
3foundation · easy
A JSON configuration file contains a trailing comma after the last item in an array, causing a parse error. Which of the following is the most appropriate way to fix it?
Select an answer first
4foundation · easy
A browser displays a warning that a website's certificate is not trusted. Which of the following is the most likely cause?
Select an answer first
5foundation · easy
An API client is receiving a 404 Not Found error for a request that was working previously. Which of the following is the most likely cause?
Select an answer first

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