CompTIA Updated 220-1202 Exam Questions and Answers by rayna

Keychainis the built-in macOS utility that manages and stores credentials, including passwords and certificates.

According toQuentin Docter – CompTIA A+ Complete Study Guide:

“Keychain Access in macOS is used for managing and storing passwords securely, similar to credential managers in Windows.”

The scenario involves an application that should retrieve data from a local database server but is failing to do so. This likely indicates a problem in communication between the application and the database server (such as a network issue, port misconfiguration, or service unavailability). The correct troubleshooting approach involves testing the network/service connectivity between the client and the database.

Let’s examine the options:

A. ipconfig:This command displays IP configuration details for Windows systems, such as IP address, subnet mask, and default gateway. While useful for diagnosing general network issues, it does not test service connectivity or the availability of a specific application port/service.

B. nslookup:Used to query DNS servers to resolve domain names to IP addresses. However, since the question references a local server (likely accessed via IP or static hostname), DNS is probably not involved. Also, it does not test application/service availability.

C. netstat:Displays active TCP connections, listening ports, and routing tables. It helps determine whether the local system is listening for or maintaining any network connections, but it does not initiate a connection to test availability. It’s diagnostic but not interactive for service testing.

D. curl:This is the most appropriate tool for this scenario. curl is used to test connectivity to services over protocols like HTTP, HTTPS, FTP, and more. If the application retrieves data via a web interface or API (common in database-driven applications), curl can be used to test if the application can successfully reach and retrieve data from the server. It provides immediate, testable feedback on whether the server and service are available and responsive.

Example usage:

curlhttp://localhost:8080/api/data

This command would test whether a local server ' s application programming interface (API) is available and responding on port 8080.

CompTIA A+ 220-1102 Reference Points:

Objective 2.4: Given a scenario, use appropriate tools to troubleshoot and support Windows OS issues.

Objective 3.3: Use appropriate tools to troubleshoot and resolve issues.

The CompTIA A+ Core 2 study guide references curl as a useful command-line utility for testing connectivity and troubleshooting application access to services.

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The best option is to provide temporary elevation rather than permanently increasing a user’s privileges. Quentin Docter explains the principle of least privilege: users should have “the fewest number of privileges that they need to do their job,” because administrative access increases the chance of misconfiguration and security compromise. He also describes how User Account Control (UAC) supports least privilege by logging an administrator in with minimal permissions and then allowing the user to “run as a standard user with the ability to escalate privileges.” That is the practical idea behind just-in-time access—grant admin rights only at the moment they are needed.

The All-in-One guide reinforces this by explaining that if you are logged in with a less-privileged account, you can elevate for installs by entering admin credentials or choosing Run as administrator. Adding the user to the local Administrators group (D) violates least privilege. Assigning Power User (B) is not reliable in modern Windows and still broad. Manual installation (C) doesn’t solve the permission requirement.

To display a file’s contents in Linux, the standard command is cat. Quentin Docter states: “Sometime you just need to view the contents of a file. To view the contents of a file, use the cat command,” and shows an example cat /etc/hosts displaying the file output. He also lists essential Linux commands and explicitly defines cat as: “Displays the contents of a file.”

The other options do not meet the requirement: chmod changes file permissions, ls lists directory contents (or file names), and sudo runs a command with elevated privileges—none directly display a file’s contents by themselves. A+ also expects you to know that cat can do more than display; it can concatenate files and redirect output, but for this question the key function is simply viewing a file.

Therefore, the correct command is cat (B).