Test
comp & os midterm ch.9
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Preguntas del test (54)
1A mobile device determines its location by using Bluetooth and GPS information as well as crowd-sourced Wi-Fi and cellular databases built from anonymous, encrypted, geo-tagged locations of Wi-Fi hotspots and cell towers.
- AVerdadero
- BFalso
2[blank_start]Android[blank_end] OS by Google is based on Linux and is used on various smartphones and tablets. It is the most popular OS for smartphones in the world.
- AAndroid
- BiOS
- CWindows
- DChrome
3[blank_start]iOS[blank_end] by Apple (apple.com) is based on macOS and is currently used on the iPhone and iPad.
- AiOS
- BWindows
- CChrome
- DAndroid
4This OS is the most popular OS for smartphones in the world. Nearly 80 percent of smartphones sold today use this OS. Combining both smartphones and tablets, it holds over 70 percent of the worldwide market.
- AAndroid
- BiOS
- CWindows
- DChrome
5Chrome OS is designed solely for use on Google’s Chromebook.
- AVerdadero
- BFalso
6Google (google.com and android.com) manages and owns Android, and assumes a leadership role in development, quality control, and distributions of the Android OS and Android apps.
- AVerdadero
- BFalso
7[blank_start]Android[blank_end] apps are old or freely distributed from any source or vendor whereas the only place to go for an [blank_start]iOS[blank_end] app is the App Store.
- AAndroid
- BiOS
8Windows apps are obtained through the Microsoft Store app. Additionally, like Android apps, Windows Mobile apps can be obtained from third-party websites via the browser on the mobile device.
- AVerdadero
- BFalso
9Chrome OS is automatically updated about every [blank_start]six[blank_end] weeks and includes some significant security measures to protect the computer from malware, including built-in virus protection.
- A6
- B4
- C1
- D10
10Chrome Security:
[blank_start]Sandboxing[blank_end]. Each tab in the Chrome browser is isolated from the underlying OS and from processes in other tabs.
[blank_start]Verified boot[blank_end]. Similar to the Windows Secure boot, it protects the OS from changes being made to its underlying system files, automatically entering recovery mode if modifications are detected.
[blank_start]Power washing[blank_end]. The user can perform a simple and quick reset to factory settings in the event a malware infection does manage to take hold.
[blank_start]Quick updates[blank_end]. The OS updates itself in the background without user intervention about every six weeks. If an update is needed for a security patch, it can happen within 48 hours.- ASandboxing
- BVerified boot
- CPower washing
- DQuick updates
11Android and Chrome OS are [blank_start]open source[blank_end].
iOS and Windows Mobile are [blank_start]closed source[blank_end].- Aopen source
- Bclosed source
- Cclosed source
- Dopen source
12Closed source systems are also called vendor-specific or commercial license operating systems.
- AVerdadero
- BFalso
13What are the cons of the ability for manufacturers to modify Android source code for their smartphone or tablet?
- Avariations can make it difficult for developers to write apps that are compatible with any given Android platform
- Binconsistencies can also make it difficult for users to learn to use new Android devices
- Cthe modified code can be prone to security issues
- Dthere are no cons
14Apple shares its iOS source code and internal functions of the OS. Third-party developers of apps have access only to APIs, which are requests to the OS to perform a function, such as to access data provided by the embedded GPS.
- AVerdadero
- BFalso
15If you get stuck, check the user guide for the device, which you can download from the device manufacturer’s website. The user guide is likely to tell you the detailed steps of how to connect to a network, configure email, update the OS, sync and back up settings and data, secure the device, and what to do when things go wrong.
- AVerdadero
- BFalso
16A mobile device might have several antennas—primarily:
- AWi-Fi
- BGPS
- CBluetooth
- DNFC
- ECellular
- FEthernet
17You can't automatically disable the antennas in a mobile device that can transmit signals by enabling airplane mode so that the device can neither transmit nor receive the signals.
- AVerdadero
- BFalso
18Enabling WiFi can drain a phone's battery.
- AVerdadero
- BFalso
19A cellular network uses GSM or CDMA for voice and another layer of technology for data transmissions, such as 3G, 4G, 5G, and LTE.
- AVerdadero
- BFalso
20[blank_start]GSM and LTE[blank_end] require a SIM card installed in the device, and [blank_start]CDMA[blank_end] does not use a SIM card unless the network is also using LTE, which does require a SIM card unless the network is also using LTE, which does require a SIM card.
- AGSM and LTE
- BGSM and CDMA
- CLTE and CDMA
- DCDMA
- EGSM
- FLTE
21[blank_start]IMEI[blank_end] is a unique number that identifies a mobile phone or tablet device worldwide. The number can usually be found imprinted on the device or reported in the About menu of the OS.
[blank_start]IMSI[blank_end] is a unique number that identifies a cellular subscription for a device or subscriber, along with its home country and mobile network. Some carriers store the number on a SIM card installed in the device.- AIMSI
- BIMEI
22[blank_start]Bluetooth[blank_end] is a short-range wireless technology to connect two devices in a small PAN.
- ABluetooth
- BNFC
- CWiFi
- DLTE
23[blank_start]Near Field Communication (NFC)[blank_end] is a wireless technology that establishes a communication link between two ___ devices that are within 10 cm (about 4 inches) of each other. For example, when two smartphones get within close range, they can use ___ to exchange contact information. ___ connections are also used for contactless credit card payments at a store.
- ANFC
- BWiFi
- CBluetooth
- DInfrared
24The app can either download email messages to your device (using the [blank_start]POP3[blank_end] protocol) or can manage messages on the server (using the [blank_start]IMAP[blank_end] protocol).
- AIMAP
- BPOP3
25Outgoing email is normally sent using the protocol [blank_start]SMTP[blank_end]. A more secure alternative is S/MIME (Secure/Multipurpose Internet Mail Extensions), which encrypts the email message and includes a digital signature to validate the identity of the sender.
- ASMTP
- BPOP3
- CIMAP
26[blank_start]Syncing[blank_end] mirrors app data and other content among your devices and/or the cloud that use the same Apple or Google account.
[blank_start]Backups[blank_end] are copies of app data, configuration settings, and other content stored in case you need it to recover from a failed, lost, or corrupted device.- ASyncing
- BBackups
27Bluetooth is a short-range wireless technology to connect two devices in a small [blank_start]PAN[blank_end].
- APAN
- BWAN
- CWAP
- DLAN
28Which is an example of an infrared wireless connection?
- ATV remote
- BKeyboard
- CMonitor
- DSpeakers
- EMouse
29NFC can be used for:
- Aexchanging contact information
- Bcontactless credit card payments
- Cbackup data
- Dconnect keyboard to system
30In addition to syncing files and other content, you can sync activity in progress:
For example, suppose you’re visiting a webpage on your smartphone, and you want to open that webpage in your desktop’s browser without searching for it again. Or suppose you’re working on a document on one device, and you want to continue your work on the other device.- Aapple handoff
- Bmicrosoft launcher
- Ccontinue on PC
- DiTunes
- EOneDrive
31The point when the manufacturer of software or hardware stops providing updates or patches for its product is called:
- Aend-of-life limitation
- Bend-of-life shelf
- Cexpiration date
- Dproduction halt
32Syncing emails, contacts, calendars, photos, and other data through online accounts or to your computer is called a [blank_start]file-level[blank_end] backup, because each file is backed up individually. It doesn't include your app data or OS settings, such as your Wi-Fi passwords, account profile, or device and app configuration.
- Afile-level
- Bpartial image-level
- Ccombination of file-level and partial
33Mobile device OS offers only a [blank_start]partial image-level[blank_end] backup that includes settings, native app data, Wi-Fi passwords, the account profile, and device and app configuration. Third-party app configurations and their data are not included in the OS backup.
- Apartial image-level
- Bfile-level
- Ccombination of file-level and partial
34android backups:
- Ato computer
- Bgoogle drive
- CiTunes
- DiCloud
35If the device permanently locks and you’ve created a backup in iTunes, you can sync to the backup to access the phone. Otherwise, you’ll have to use recovery mode, which erases the device.
- AVerdadero
- BFalso
36Encrypting a device’s stored data makes it essentially useless to a thief. However, encryption might slow down device performance and data is only as safe as the strength of the password keeping the data encrypted.
- AVerdadero
- BFalso
37if the encryption process is interrupted during that time, data wont be lost.
- AVerdadero
- BFalso
38ways to protect mobile devices:
- Afirewall
- BOS updates & patches
- Cantivirus
- Dlocator app
- Escreen lock
39What is the process of obtaining root or administrator privileges to an Android or iOS device, which then gives you complete access to the entire file system and all commands and features. After an iOS phone can get apps from any source, but Apple has the right to void the warranty or refuse to provide support.
- Arooting or jailbreaking
- Bunlocking
- Clocking
- Dlock breakng
40Z-Wave and Zigbee are compatible. Zigbee is faster than Z-Wave. Z-Wave and Zigbee use encryption and are considered safe from hackers.
- AVerdadero
- BFalso
41IoT wireless technologies commonly used by smart locks, smart light bulbs, and other IoT smart home devices.
- AWi-Fi
- BBluetooth
- CZ-Wave
- DZigbee
- EEthernet
42Both Z-Wave and Zigbee devices can connect in a mesh network, which means that devices can “hop” through other devices to reach the destination device.
- AVerdadero
- BFalso
43Examples of smart home devices are:
- Asmart light bulbs
- Bthermostats
- Csecurity cameras
- Ddoor locks & doorbells
- Erefrigerators
- Ftelevisions & sound systems
44For smart devices to truly be IoT devices, you must be able to control them over the Internet. For that to happen, they must connect directly or through a bridge to a home Wi-Fi network that has Internet access.
- AVerdadero
- BFalso
45Smart speakers:
Alexa and [blank_start]Echo[blank_end] devices by Amazon.
Google Assistant and [blank_start]Google Home[blank_end].
Siri and [blank_start]HomePod[blank_end] by Apple.- AGoogle Home
- BHomePod
- CEcho
46The [blank_start]controller[blank_end] hub, also called a smart home hub, can control smart devices that use different manufacturer apps and different wireless technologies, such as Wi-Fi, Bluetooth, Zigbee, or Z-Wave, to create an integrated smart home experience.
- Acontroller
- Bunion
- Cintegrated
47The cost of replacement, including parts and labor, generally exceeds the value of fixing the device. Although it is possible to replace the screens in some mobile devices, a support technician is generally not expected to take the time to do so.
- AVerdadero
- BFalso
48[blank_start]2[blank_end]. Restart the device (also called a soft boot) and reboot the device (also called a hard boot).
[blank_start]4[blank_end]. Start over by resetting the device to its factory state (all data and settings are lost).
[blank_start]1[blank_end]. Close, uninstall, and reinstall an app. Too many open apps can shorten battery life and slow down device performance. If you suspect an app is causing a problem, uninstall it and use the app store to reinstall it.
[blank_start]3[blank_end]. Update, repair, or reinstall the OS, or recover the system from the last backup.- A2
- B4
- C1
- D3
49When the menus in a device don’t work or the device freezes entirely, a full clean boot ([blank_start]hard[blank_end] boot) might help.
- Ahard
- Bsoft
50Android offers a [blank_start]Safe[blank_end] Mode for troubleshooting. In this Mode, only the original software installed on the phone will run so that you can eliminate third-party software as the source of the problem.
- ASafe
- BHard
- CSoft
51If an iOS device won’t turn on or start up, first consider that the battery might be dead. Try to charge it for at least an hour. If you still can’t turn it on, you can use iTunes to try to reinstall iOS without losing your data.
- AVerdadero
- BFalso
52[blank_start]Radio firmware[blank_end] on a device that manages wireless communication, such as cellular, Wi-Fi, and Bluetooth radio communication.
- ARadio firmware
- BNetwork firmware
- CDevice firmware
53[blank_start]Geotracking[blank_end] is a mobile device’s routine reporting of its position to Apple, Google, or Microsoft at least twice a day, making it possible for these companies to track your device’s whereabouts.
- AGeotracking
- BGPS
- CGPS tracking
54If you have forgotten the passcode for an iOS device, Apple advises that your only solution is to reset the device, which erases all data and settings, and then restore the device from a backup.
You can restore from a backup stored in iTunes on your computer or from iCloud.- AVerdadero
- BFalso
Información
- Descripción
- Test sobre comp & os midterm ch.9, creado por Ari Gu el 02/03/2020.
- Autor
- Ari Gu
- Idioma
- English
- Visitas
- 6
- Valoración
- Aún sin valoraciones Valora este test