ACT Technical Support & Troubleshooting 3

Question 1

A Mac boots to a folder icon with a flashing question mark. What does this indicate?

Accepted Answer

macOS cannot find a valid startup disk

Answer

A flashing folder with a question mark means the Mac's firmware cannot locate a bootable macOS installation.

Question 2

After enabling FileVault on a Mac, a user forgets their password and has no recovery key. What is the outcome?

Accepted Answer

The data on the drive is permanently inaccessible

Answer

FileVault uses AES-128 or AES-256 encryption, and without the password or recovery key, encrypted data cannot be recovered.

Question 3

A trainer is troubleshooting an iPhone that shows 'No SIM Card Installed' after a drop. After reseating the SIM tray, the error persists. What is the NEXT step?

Accepted Answer

Test with a known-good SIM card in the same tray slot

Answer

Testing with a known-good SIM isolates whether the issue is the SIM itself or the device's SIM reader hardware.

Question 4

Which macOS startup modifier key combination boots a Mac into Safe Mode to help isolate software conflicts?

Accepted Answer

Shift (held during startup)

Answer

Holding Shift during startup boots macOS into Safe Mode, which disables third-party kernel extensions and login items.

Question 5

A user reports Bluetooth audio dropouts on their Mac. Other Bluetooth devices nearby work fine. What is a common cause specific to this scenario?

Accepted Answer

Wi-Fi and Bluetooth interference on the 2.4 GHz band

Answer

Wi-Fi operating on the 2.4 GHz band can interfere with Bluetooth, causing audio dropouts, especially in congested wireless environments.

ACT Practice Test

ACT Practice Test

ACT Technical Support & Troubleshooting 3