A user recently installed an application that accesses a database from a local server. When launching the application, it does not populate any information. Which of the following command-line tools is the best to troubleshoot the issue?
Correct Answer:D
Comprehensive and Detailed Explanation From Exact Extract:
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 networkissues, 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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Which of the following is the quickest way to move from Windows 10 to Windows 11 without losing data?
Correct Answer:D
Comprehensive and Detailed Explanation From Exact Extract:
An in-place upgrade is the fastest and most efficient way to upgrade from Windows 10 to Windows 11 while keeping all user data, applications, and settings intact. This method is often used when the hardware meets Windows 11 requirements and no system reconfiguration is necessary.
* A. gpupdate is used to refresh Group Policy settings — unrelated to OS upgrades.
* B. Image deployment typically replaces the current OS and may not retain user data unless specifically customized.
* C. A clean install requires formatting the drive and starting fresh, which removes all data. Reference:
CompTIA A+ 220-1102 Objective 1.4: Given a scenario, use appropriate Microsoft operating system installation methods.
Study Guide Section: In-place upgrade vs. clean install methods
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A user reports getting a BSOD (Blue Screen of Death) error on their computer at least twice a day. Which of the following should the technician use to determine the cause?
Correct Answer:A
Comprehensive and Detailed Explanation From Exact Extract:
Event Viewer is the primary tool used to investigate system-level errors and logs, including BSODs. When a BSOD occurs, Windows logs the error codes and associated system behavior under ??System?? logs in Event Viewer. This allows the technician to review crash events, identify error codes (e.g., STOP codes), and pinpoint hardware or driver issues.
* B. Performance Monitor is used for real-time performance tracking and trend analysis, not crash logs.
* C. System Information displays system specs but not crash logs or events.
* D. Device Manager shows device status and driver issues but doesn??t retain error logs related to BSODs.
Reference:
CompTIA A+ 220-1102 Objective 3.1: Given a scenario, troubleshoot common Windows OS problems.
Study Guide Section: Troubleshooting BSODs using Event Viewer and system logs
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A network technician notices that most of the company's network switches are now end-of- life and need to be upgraded. Which of the following should the technician do first?
Correct Answer:C
Comprehensive and Detailed Explanation From Exact Extract:
The first step in the IT change management process is to identify and propose the change. In this case, the technician notices a need (end-of-life network switches), so the
appropriate action is toformally propose a change. This proposal would be documented and submitted for approval before any planning or implementation occurs.
According to the CompTIA A+ 220-1102 objectives under Operational Procedures (Domain 4.0), the change management process follows these typical steps:
✑ Submit a change request (Propose the change)
✑ Review and approval (Approve the change)
✑ Planning and scheduling (Schedule the change)
✑ Implementation
✑ Documentation and review
Therefore, proposing the change is the correct first step in accordance with standard ITIL- based change management practices.
Reference:
CompTIA A+ 220-1102 Objective 4.1: Given a scenario, implement best practices associated with documentation and support systems information management.
Study Guide Section: Change Management Process
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Which of the following is a Linux command that is used for administrative purposes?
Correct Answer:D
Comprehensive and Detailed Explanation From Exact Extract:
The su (substitute user) command is used in Linux to switch to another user account, most commonly to escalate privileges by switching to the root (administrator) account. It allows administrative tasks to be performed in a terminal session.
* A. runas is a Windows command for executing a program under another user's context.
* B. cmcl is not a valid Linux or administrative command.
* C. net user is a Windows command for managing local user accounts.
Reference:
CompTIA A+ 220-1102 Objective 1.9: Identify common features and tools of the Linux client/desktop OS.
Study Guide Section: Linux command-line tools — su, sudo
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