1100 Ch12: Mobile and OS Overview Quiz

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Questions and Answers

Which of the following Linux distributions is known for its popularity in server environments?

CentOS® (correct)

SUSE®

Fedora®

Ubuntu®

What is a key feature of macOS High Sierra and later versions?

Increased maximum file size limitations

Native file encryption with APFS (correct)

Support for journaling file system

Support for FAT file systems

Which statement is true about the architecture of Unix?

Unix is a proprietary operating system developed in C. (correct)

Unix architecture is based on the Linux kernel.

Unix is written primarily in assembly language.

Unix is open-source and widely distributed.

What is the primary purpose of a GUI in a Linux distribution?

To enhance user interaction with applications Signup and view all the answers

How does ext4 file system compare to ext3?

ext4 delivers significantly better performance than ext3. Signup and view all the answers

What is the maximum volume size allowed in HFS Plus?

8 ExaBytes Signup and view all the answers

Which component is essential for swapping in a Linux operating system?

Swap partition Signup and view all the answers

Which of the following is a backup tool specifically available for Linux?

Déjà Dup Signup and view all the answers

What is the primary function of Time Machine in macOS?

Incremental backups of user data Signup and view all the answers

Which feature is NOT supported by Déjà Dup?

Local snapshot restoration Signup and view all the answers

To enable Time Machine, which path must a user navigate through in macOS?

System Preferences > Time Machine Signup and view all the answers

What happens when the Time Machine backup drive becomes full?

It stops taking new backups until space is freed Signup and view all the answers

Which of the following tools is used for disk-related tasks in Ubuntu Linux?

Disks Signup and view all the answers

What type of backup can Time Machine perform if the destination backup disk is not available?

Local snapshot Signup and view all the answers

What does the 'Options' button in Time Machine allow users to do?

Select or unselect files to backup Signup and view all the answers

Which feature is utilized by the Disk Utility of macOS?

Disk partitioning and formatting Signup and view all the answers

Which file systems are supported by Linux?

ext3, ext4, FAT, and NFS Signup and view all the answers

What is a unique feature of macOS that is not found in Linux?

Built-in backup tool called Time Machine Signup and view all the answers

What security feature helps prevent unauthorized access after multiple failed login attempts on mobile devices?

Disabling access Signup and view all the answers

Which of the following is a capability of Linux in comparison to macOS?

User can replace the GUI Signup and view all the answers

Which of the following is true regarding the troubleshooting process in operating systems?

It can be applied to mobile, Linux, and macOS operating systems. Signup and view all the answers

Which feature is used to securely lock a mobile device remotely?

Remote lock Signup and view all the answers

Which of the following statement is accurate regarding macOS and Linux file systems?

macOS uses HFS and APFS file systems primarily. Signup and view all the answers

In the context of mobile security, what does remote wipe do?

Erases data from a lost or stolen device Signup and view all the answers

Which characteristic distinguishes macOS from Linux?

Pre-installed backup tool Signup and view all the answers

Study Notes

Mobile, Linux, and OSX Operating Systems

Mobile devices use operating systems to interface with hardware and run software.
Android and iOS are the two most common mobile operating systems.
Linux and macOS are also popular desktop operating systems.
Mobile OSs have components, functions, and terminology.
Android is open-source and customizable; iOS is proprietary and closed-source.
Mobile devices have features like screen orientation, calibration, Wi-Fi calling, virtual assistants, and GPS.
Mobile security features include screen lock, biometric authentication, remote lock, wipe, and patching/upgrading.
Mobile OSs can disable access after multiple failed login attempts to prevent unauthorized access.
Mobile devices often have remote lock and wipe functions for lost or stolen devices.

Open Source vs. Closed Source

Mobile devices use operating systems (OS) to run software, similar to desktops and laptops.
Android is developed by Google; iOS is developed by Apple.
Source code is the sequence of instructions written in human-readable language before being converted to machine code.
Source code allows for software analysis, modification, and distribution.
Open-source software provides source code for analysis and modification; closed-source does not.

Android GUI

Android is an open-source, Linux-based smartphone/tablet OS developed by the Open Handset Alliance.
Android was released in 2008 on the HTC Dream.
Android is designed for a wide range of devices and is customizable.

iOS GUI

iOS is a closed-source, Unix-based OS for Apple's iPhone and iPad.
iOS was released in 2007.
The source code is not publicly available.

Windows 10 Mobile

Microsoft created Windows for mobile devices, including Windows CE, Windows Phone 7 and 8, and Windows 10 Mobile.
Windows 10 Mobile provides similar user interface and code use as other Windows devices.
Microsoft products under the Surface name use this system.

Applications and Content Sources

Apps are programs executed on mobile devices.
Apps are compiled for specific OSs such as Apple iOS, Android, or Windows.
Mobile devices come with pre-installed apps for basic functionalities.
Applications can be used to make calls, send emails, listen to music, take pictures, and play videos.
Apps can be downloaded or purchased.

iOS Apps

iOS apps are downloaded from the App Store and are subject to Apple's approval process.
Apple's walled garden model for apps helps prevent malicious code.
Third-party developers can create iOS apps using Apple's SDK.

Android Apps

Android apps are available via Google Play and third-party stores.
The Android app environment is sandboxed, limiting permissions to those explicitly granted by the user.

Automobile Apps

In-vehicle entertainment systems are a growing trend.
Mobile devices can be connected to the system through USB or Bluetooth.
Features include navigation, music, talk-to-text, hands-free calling, and digital assistant access.

Passcodes, PINs, patterns, or other security types prevent unauthorized access.
Mobile devices can be configured to lockout after a specific number of incorrect attempts.
Mobile devices can lock or wipe following a certain number of failed passcode attempts.

iOS Erase Data

If the iOS passcode is incorrect 10 times, all data on the device is erased.
Restoration is possible using backups in iTunes or iCloud.

Remote Backup

Mobile device data backups are essential for preventing data loss.
Mobile device backups can be performed to various cloud services or local PCs.
Remote backups are possible through cloud services or other devices.

Package (Apk) Files

Users can directly install software without using the app store interface.

Introduction to Linux and macOS Operating Systems

Linux supports file systems like ext3, ext4, FAT, and FAT32.
NFS enables mounting remote storage.
Linux uses a swap partition for memory management.
macOS uses the Extended Hierarchical File System (HFS Plus), capable of handling large files.
macOS now uses the Apple File System (APFS).
macOS has a maximum volume size of 8 Exabytes.
Unix is a proprietary OS written in the C language.
macOS and iOS both build on the BSD version of Unix.

Linux

Linux is a widely used, open-source operating system.
Several distributions or "distros" of the Linux operating system exist.
Linux typically has a graphical user interface.

macOS

macOS is a closed-source OS developed for Macintosh computers.

Overview of the Linux GUI

Ubuntu Linux typically uses the Gnome desktop environment.
The user can customize the display by adding or removing components.

Overview of the macOS GUI

macOS uses a graphical user interface called Aqua.
Gestures can be used to control the interface.
Mission Control shows/organizes open applications.
Finder is a file system manager, similar to Windows File Explorer.
Remote Disk access can be used for optical media (CD/DVD).
macOS allows screen sharing.

The menu bar provides access to various OS functions.

Spotlight

Spotlight is a search function in macOS.

Notification Center

Displays notifications relevant to the current system.

Dock

The Dock displays running applications/frequently used applications.

Overview of Linux and macOS CLI

CLI communication with the operating system is common on Linux and macOS.

Commands (or tools) can be used with parameters, and options.

Linux terminal emulators/macOS terminal emulator

Terminal Emulators on both OSs are commonly used interfaces.

Linux Backup and Recovery

Data backups are essential.
Commercial and open-source tools provide backup options for Linux.

macOS Backup and Recovery

Time Machine is a macOS backup tool.
Time Machine backs up files frequently.
Local snapshots of Time Machine backups can also be created on the local storage device.

Scheduled Tasks

Scheduling regular tasks like backups and disk maintenance prevents human errors.
Tasks can be scheduled on Linux via the cron service.

Operating System Updates

Operating systems are constantly updated to resolve vulnerabilities.
Firmware updates enhance low-level device functionality.
Antivirus and antimalware programs are important security measures.

Security Credentials

Passwords, usernames, digital certificates, and encryption keys are security credentials.
Security credentials service handles these credentials.

Basic Unix File and Directory Permissions

File permissions control how users access files and folders in Unix-based systems.

Linux Admin Commands

passwd changes user passwords.
ps monitors processes.
kill ends processes.
ifconfig configures network interfaces (deprecated).
iwconfig configures wireless interfaces.
chmod controls file permissions.
sudo elevates privileges for some tasks.
chown changes file ownership.
apt-get manages packages in Debian-based Linux distributions.
shutdown manages system shutdown.
dd copies files and partitions.

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Description

Test your knowledge on mobile operating systems, including Android and iOS, as well as Linux and macOS desktop environments. Explore the features, security functions, and differences between open-source and closed-source systems. This quiz covers essential terminology and components of each system.