Although a phone number contains only digits, it is best stored as a string because:
* It doesn't require mathematical operations.
* It may include formatting symbols like dashes or parentheses.
"Phone numbers are stored as strings because they are identifiers, not values for computation." - CompTIA ITF+ Data Types Correct answer: A

The CompTIA Tech+ Study Guide (Exam FC0-U71, 3rd Edition, 2025) clearly states:
"If you need to have multiple concurrent users accessing data, you need a database. Flat files don't do well when several people try to access them at once. In the vast majority of cases, one user might be able to write to the file, but all users will be limited to a read-only copy." It further explains that:
"Databases generally lock only on a record level (or individual line of data), so multiple people can actively use the database at one time." Therefore, the best reason to convert a large spreadsheet to a database is to allow multiple concurrent users to access and update the data simultaneously without conflicts.
Verified Reference:
* Chapter 7: Database Fundamentals - "When to Use Databases" (pp. 389-391).

After resolving the issue, the final step in the CompTIA troubleshooting methodology is to document the findings. This includes noting what was done, what caused the issue, and how it was resolved, so others can reference it in the future.
"After resolving and verifying the issue, document the findings, actions taken, and outcomes to complete the troubleshooting process." - CompTIA ITF+ Troubleshooting Steps Correct answer: B

Process management in an operating system is responsible for controlling the execution of applications, assigning CPU time, and prioritizing active processes to optimize performance.
"Process management allocates resources, prioritizes applications, and ensures multitasking is efficiently handled by the OS." - CompTIA ITF+ Operating Systems Guide Correct answer: B

Task management utilities like Task Manager in Windows are used to monitor and manage running applications and processes, including ending unresponsive ones.
"Task Manager is used to view and end processes or applications that are not responding." - CompTIA ITF+ Correct answer: B