Apple Apple Device Support Practice Test - Questions Answers, Page 4

If a revive is unsuccessful, you can use Apple Configurator to restore the Mac. A restore updates the firmware, updates recoveryOS to the latest version, and erases and installs the latest version of macOS on your internal storage. When this process is complete, any data on any internal volumes is unrecoverable. You must restore the firmware and erase the internal flash storage if reviving the firmware is unsuccessful or if you can't start the Mac from the startup volume or the recoveryOS.Reference:Revive or restore a Mac with Apple silicon using Apple Configurator - Apple Support

The terminal commanddefaults write com.apple.finder ShowMountedServersOnDesktop truesets the Finder preference to show mounted servers on the desktop. This is equivalent to checking the box for ''Connected Servers'' in the Finder settings under the General tab. The other commands are either invalid or do not change the preference value.

defaults read com.apple.finder ShowMountedServersOnDesktop truereads the current value of the preference, but does not modify it.

defaults cat com.apple.finder ShowMountedServersOnDesktop trueis not a valid command, ascatis not a valid subcommand fordefaults.

defaults append ShowMountedServersOnDesktop com.apple.finder trueappends the valuetrueto the preference keyShowMountedServersOnDesktop, which is not a valid operation, as the preference value should be a boolean, not a list.Reference:

Apple Device Support Exam Prep Guide, page 11

Change Finder settings on Mac

How to show Hard Disk icon on Desktop via Terminal?

The Q key is the universal shortcut to quit or exit a manual page in the Terminal window. The manual page, or man page, is a document that provides information about a command or utility in the Unix-like operating systems. The man command is used to display the man page for a given command or topic. The man command uses a pager program, such as less or more, to display the man page in the Terminal window. A pager program allows the user to scroll through the text file one page, line, or half-page at a time. To exit the pager program and return to the shell prompt, the user needs to press the Q key. This is the same for any other program that invokes the pager program, such as git log or git diff. The Q key stands for quit, and it is easy to remember for Mac users who are familiar with the Command + Q shortcut to quit an application.Reference: =How to escape out of the MAN screen or page in UNIX?,How to Exit the MAN Command and Quit Man Pages Properly,How to Quit the MAN Command and Exit Man Pages Properly,How to jump to the end of a 'man' page

Two-factor authentication is an extra layer of security for your Apple ID, designed to make sure that you're the only one who can access your account---even if someone else knows your password1.When you sign in with your Apple ID for the first time on a new device or on the web, you need both your password and the six-digit verification code that's automatically displayed on your trusted devices1.A trusted device is a device that you've already signed in to with your Apple ID and that can receive verification codes1.You can also add or remove trusted devices and phone numbers from your Apple ID account page1. Two features of two-factor authentication for a personal Apple ID are:

It ensures that only the account's owner can access the account.This is because you need to verify your identity with both your password and a verification code that is sent to a device or phone number that only you have access to1.This prevents unauthorized access to your account even if your password is compromised or stolen1.

It can be accessed on trusted devices.This means that you can sign in to your Apple ID account on devices that you've already verified with two-factor authentication without needing to enter a verification code again1.This makes it easier and faster to access your account on devices that you use frequently and trust1.

You can use your Apple Watch to unlock your Mac computer's screen saver and approve authentication requests from macOS and other apps, without having to enter a password. This feature is called Auto Unlock and Approve with Apple Watch, and it requires that you have an Apple Watch with watchOS 6 or later, a Mac with macOS Catalina or later, and that both devices are signed in with the same Apple ID using two-factor authentication. To turn on this feature, you need to go to System Preferences > Touch ID & Password > Apple Watch and enable the option next to the name of your watch. Then, whenever you wake your Mac from its idle state or an app requires authentication, you can double-click the side button of your Apple Watch to unlock or approve the task.Reference:

Unlock your Mac and approve requests with Apple Watch - Apple Support

Authentication Services | Apple Developer Documentation

Approve App Authentication Requests with Your Apple Watch in Catalina

Find My uses Bluetooth signals from nearby Apple devices to locate lost or missing devices, even when they're offline. This feature is called Find My network, and it creates a secure and anonymous network of hundreds of millions of Apple devices that can help find each other. When you mark your device as lost, it sends out a secure Bluetooth beacon that can be detected by other Apple devices nearby. Those devices relay the location of your device to iCloud so you can see it on a map. Find My network respects your privacy and does not reveal any personal information or location data to anyone. Find My also uses Wi-Fi and cellular data to locate devices that are online and have Location Services enabled.Reference:Find My network overview - Apple Support,Locate a device in Find My on iPhone - Apple Support

Wi-Fi signal level, also known as Received Signal Strength Indicator (RSSI), is a measure of how well your device can receive the wireless signal from the router or access point. It is usually expressed in decibel-milliwatts (dBm), which is a logarithmic scale that ranges from -30 dBm (very strong signal) to -100 dBm (very weak signal). The higher the negative value, the weaker the signal.

According to the Apple Device Support Reference Materials1, iPhone and iPad will search for a stronger Wi-Fi network when the signal level drops below -80 dBm. This is because a weak signal can affect the performance, reliability, and security of your Wi-Fi connection. A weak signal can also drain your device's battery faster, as it requires more power to maintain the connection.

To check the Wi-Fi signal level on your iPhone or iPad, you can use the following steps23:

Open the Settings app on your device.

Go to Wi-Fi.

Under the Wi-Fi network list, locate the name of the Wi-Fi network or wireless router you want to check the signal strength for.

Tap the information icon (i) next to the network name.

Look for the RSSI value, which shows the signal level in dBm.

Alternatively, you can also use third-party apps that can display the Wi-Fi signal level on your device, such as Wi-Fi Sweetspots or Network Analyzer.

Recommended settings for Wi-Fi routers and access points.

How to View Wi-Fi Networks Signal Strength on iPhone or iPad.

How to View Wi-Fi Networks Signal Strength on iPhone or iPad | Guide.

An IP address that starts with 169.254 suggests there may be a problem with DHCP. This is because 169.254 is the prefix for a link-local address, which is an address that is automatically assigned by the device when it cannot obtain an IP address from a DHCP server. A link-local address allows the device to communicate with other devices on the same local network, but not with devices on other networks. A link-local address indicates that either the DHCP server is not available, not configured properly, or not reachable by the device. To resolve this issue, the device should try to renew its IP address from the DHCP server, or the DHCP server should be checked for any errors or misconfigurations. The other IP addresses are valid addresses that can be assigned by a DHCP server, and do not indicate any problem with DHCP.Reference:DHCP Error: What It Is and How to Fix It - Lifewire,7.4.4 Module Quiz - DHCPv4 (Answers) - ITExamAnswers

To quit out of a man page in Terminal Mac, you need to press the q key on your keyboard. A man page is a manual page that shows the usage and syntax of a command or a program. The man command uses a pager program to display the man page on the screen. A pager program is a program that lets you view a text file one page at a time, or scroll up and down. The default pager program for the man command is less, which is a more advanced version of the more program. The q key is the command to quit the less program and return to the shell prompt. The other options, less, clear, and esc, are not valid ways to quit out of a man page in Terminal Mac. Less is the name of the pager program, not a command. Clear is a command to clear the screen, not to quit the pager program.Esc is a key to escape from certain modes or commands, not to quit the pager program.Reference:1How to Exit the MAN Command and Quit Man Pages Properly - OS X Daily2How to escape out of the MAN screen or page in UNIX?- Stack Overflow3How to use the command manual in Terminal | Macworld4How to Quit the MAN Command and Exit Man Pages Properly - Bollyinside