IT Essentials v8 Chapter 12 Check Your Understanding Answers

1. What are three features of the iOS mobile device operating system? (Choose three.)

• Linux based operating system
• closed source operating system
• developed by Open Handset Alliance
• source code not released to the public
• uses walled garden model for apps
• third-party apps are installed directly using an .apk file

2. For each scenario, select the screen lock method that is described.

• This screen lock requires that a four or six-digit numeric code be entered to unlock the mobile device. The best choice is a passcode lock.
  – This is the most common method to lock mobile devices. Passcode options can also include setting a custom numeric code or alphanumeric password.
• This screen lock requires the user simply swipe the device screen in a pre-defined direction to unlock the device. The best choice is a swipe lock.
  – Also called Slide to unlock on many Android devices. Although convenient, this less secure method should only be used if security is unimportant.
• This screen lock requires the user to join four or more dots in a specific pattern to unlock the device. The best choice is a pattern lock.
  – Available on many Android devices. The screen unlocks using a pattern you draw with your finger.
• This biometric screen lock can unlock a device by scanning the user’s fingerprint. The best choice is a fingerprint lock.
  – This iOS and Android feature converts the user’s fingerprint scan into a unique hash. When a user touches the fingerprint sensor, the device re-computes the hash. The device unlocks if the hash values match.
• This biometric screen lock can unlock a device by simply looking at it. The best choice is a face lock.
  – This iOS and Android feature computes a hash using a picture of the user’s face. Nice try, but that’s not the correct answer.

3. Which two mobile device screen lock security features use biometric data? (Choose two.)

• face lock
• fingerprint lock
• pattern lock
• swipe lock
• passcode lock

4. Match the action with the mobile device security feature.

5. Which statement is correct regarding mobile device security?

• Running apps in a sandbox helps mitigate damage to mobile devices by malicious software.
• Rooting is a method of removing restrictions on modifying code on an iOS device.
• Jailbreaking exploits vulnerabilities on Android devices.
• Updates and patches for Android devices are released as one package for all devices.
• Jailbreaking exploits vulnerabilities on iOS devices.

6. What are two features of the Linux and macOS operating systems? (Choose two.)

• Linux and macOS are open-source and independently developed operating systems.
• Linux can be customized by the user installing and removing software components.
• macOS includes a Disk Utility to backup and perform image recovery.
• macOS supports the Gnome-terminal terminal emulator.
• Linux and macOS use the Grub boot manager.

7. Match the Linux or macOS feature to the description.

8. Which four Linux commands would be used to create a new directory under the current directory, copy files to that new directory, make that directory the current directory, and displays the files in that directory? (Choose four.)

• mkdir
• cp
• cd
• ls
• mv
• rm
• pwd

9. Which Linux file permission should be applied to a file that only the file owner can read, change, and execute, but allows all other users to read and execute the file?

• rwxr-xr-x
• rwxtwxrwx
• rw-r–r–
• rw-rw-rw

10. Match the file or administrative Linux command to the description.