Answer: A. Using portable devices for computing. Mobile computing uses portable devices and wireless connectivity to access data and applications.
Which component integrates several core computing functions on one chip?
A SIM card
B System on a chip
C Display panel
D Battery controller
Answer: B. System on a chip. A system on a chip integrates components such as processor cores and other system functions.
What can a smartphone system-on-chip combine?
A A keyboard and charger
B A screen and case
C CPU, graphics, and other components
D A camera and headphones
Answer: C. CPU, graphics, and other components. Mobile SoCs commonly combine CPU, graphics, and other supporting components.
What does a cellular baseband modem handle?
A Touchscreen brightness
B Application icons
C File compression
D Cellular radio communication
Answer: D. Cellular radio communication. The baseband modem handles cellular communication functions between the device and mobile network.
What does a SIM or eSIM help a mobile network identify?
A Subscriber identity
B Stored photos
C Screen size
D Battery capacity
Answer: A. Subscriber identity. A SIM profile stores credentials used to identify and authenticate a subscriber to a mobile network.
How does an eSIM differ from a removable SIM card?
A Larger card
B Embedded; remote provisioning
C Works only offline
D Stores photos
Answer: B. Embedded; remote provisioning. An eSIM is embedded in a device and supports remote provisioning of mobile subscriptions.
Which cellular technology is associated with fourth-generation mobile networks?
A Bluetooth
B NFC
C LTE
D Wi-Fi Direct
Answer: C. LTE. LTE is a widely deployed technology associated with 4G mobile broadband.
What does the abbreviation 5G NR stand for?
A Bluetooth
B NFC
C Wi-Fi Direct
D Fifth-generation New Radio
Answer: D. Fifth-generation New Radio. 5G NR is the radio access technology specified for 5G networks.
What defines a cell in a cellular network?
A Base-station coverage
B Phone storage partition
C App permission
D Battery unit
Answer: A. Base-station coverage. A cell is a geographic coverage area served by cellular radio equipment.
During a handover, what changes for a moving phone?
A Opens a browser
B Serving cell for connection
C Uses a partner network
D Disables Bluetooth
Answer: B. Serving cell for connection. A handover transfers an active connection from one cell or base station to another.
When does mobile roaming commonly occur?
A Opens a browser
B Changes wallpaper
C Uses a partner network
D Disables Bluetooth
Answer: C. Uses a partner network. Roaming occurs when a subscriber uses a network other than the home operator’s network.
Which feature lets a phone share its internet connection?
A Replace its SIM profile
B Store a cloud backup
C Measure screen brightness
D Share internet with nearby devices
Answer: D. Share internet with nearby devices. A mobile hotspot shares a phone’s data connection with nearby devices over Wi-Fi.
What does tethering allow a phone to share?
A Sharing one device’s internet connection
B Pairing two headphones
C Moving files to a folder
D Changing a display theme
Answer: A. Sharing one device’s internet connection. Tethering shares a device’s network connection with another device.
Which radio connections does airplane mode primarily disable?
A All local storage
B Cellular radio connections
C The operating system
D The touchscreen
Answer: B. Cellular radio connections. Airplane mode initially disables cellular radios; some devices then allow users to re-enable selected wireless features.
Which sensor measures linear acceleration and movement?
A Gyroscope
B Proximity sensor
C Accelerometer
D Ambient light sensor
Answer: C. Accelerometer. An accelerometer measures acceleration and can detect device movement or tilt-related changes.
What movement can a mobile gyroscope measure?
A Nearby object or face
B Measures cloud storage
C Changes SIM profile
D Angular rotation rate
Answer: D. Angular rotation rate. A gyroscope measures rotational movement around one or more axes.
When can a proximity sensor be useful on a phone?
A Nearby object or face
B Measures cloud storage
C Changes SIM profile
D Scans Wi-Fi passwords
Answer: A. Nearby object or face. A proximity sensor detects nearby objects, such as a face close to the screen during a call.
What does an ambient light sensor measure?
A Network latency
B Light around the device
C The phone’s storage use
D Cellular signal frequency
Answer: B. Light around the device. An ambient light sensor measures surrounding light and may help adjust display brightness.
How can GNSS help a mobile device estimate its location?
A Compress images
B Authenticate apps
C Estimate location from satellite signals
D Share a Wi-Fi password
Answer: C. Estimate location from satellite signals. GNSS receivers estimate location using signals from navigation satellites.
Which characteristic is typical of NFC communication?
A Accesses protected data
B Raises battery capacity
C Changes cellular bands
D Short-range communication
Answer: D. Short-range communication. NFC is designed for communication over a very short distance.
Why does a mobile app request permissions?
A Access protected data
B Raises battery capacity
C Changes cellular bands
D Improves screen resolution
Answer: A. Access protected data. App permissions govern access to restricted data and device features such as a camera or microphone.
How does an application sandbox improve security?
A Connect phones to cell towers
B Isolate app data and execution
C Store SIM credentials
D Control wireless charging
Answer: B. Isolate app data and execution. An app sandbox isolates an application’s data and execution from other applications.
Why should users install mobile operating-system security updates?
A Improves camera focus
B Changes the SIM
C Patches security issues
D Measures battery cycles
Answer: C. Patches security issues. Security updates can address vulnerabilities and other software defects.
How can biometric authentication unlock a mobile device?
A Scans Wi-Fi networks
B Changes the SIM
C Reads a file name
D Fingerprint or face match
Answer: D. Fingerprint or face match. Biometric authentication can verify identity using traits such as a fingerprint or face.
What does a lock screen help protect?
A Restricts casual device access
B Increases network speed
C Improves camera focus
D Extends screen life
Answer: A. Restricts casual device access. A lock screen helps prevent unauthorized access to the device and its data.
Why encrypt data stored on a phone?
A Increases network speed
B Protects data when lost
C Improves camera focus
D Extends screen life
Answer: B. Protects data when lost. Device encryption helps protect stored data from unauthorized access if a phone is lost or stolen.
Which platform is a native mobile app built for?
A Every operating system at once
B A cloud storage bucket
C A particular operating-system platform
D A mobile network tower
Answer: C. A particular operating-system platform. A native app is developed for a particular operating-system platform.
Where does a typical mobile web app run?
A Inside a SIM card
B Only on a laptop
C In cellular baseband firmware
D In a mobile browser
Answer: D. In a mobile browser. A mobile web app runs through a web browser on the device.
What does a hybrid mobile app combine?
A Combines web and native features
B Sends messages only
C Stores data on a SIM
D Controls cellular towers
Answer: A. Combines web and native features. Hybrid apps commonly combine web technologies with a native application container.
What is delivered when an app sends a push notification?
A Removable phone battery
B Message sent to an app
C Device cell tower
D Browser bookmark
Answer: B. Message sent to an app. Push notifications deliver messages from an app service to a device or application.
Why might a mobile app request notification permission?
A To change screen brightness
B To access the battery
C To show user-facing alerts
D To measure phone movement
Answer: C. To show user-facing alerts. Notification permissions control whether an app may show certain notifications.
How can background app restrictions benefit a phone?
A Increase its camera resolution
B Improve cellular tower range
C Add more processor cores
D Reduce resource and battery use
Answer: D. Reduce resource and battery use. Restricting unnecessary background activity can reduce resource use and conserve battery.
What is one goal of mobile battery optimization?
A Reduce unnecessary energy use
B Keep every app running constantly
C Disable all connectivity
D Increase device weight
Answer: A. Reduce unnecessary energy use. Battery optimization limits unnecessary work so the device can operate longer between charges.
What does a phone camera image sensor capture?
A Cellular account details
B Light to form image data
C Bluetooth pairing codes
D Battery charge cycles
Answer: B. Light to form image data. An image sensor converts incoming light into signals used to create a digital image.
Why combine several sensors in a smartphone?
A To replace the operating system
B To increase SIM storage
C To estimate motion and orientation
D To encrypt all photos
Answer: C. To estimate motion and orientation. Sensor fusion combines measurements such as acceleration and rotation to estimate device motion or orientation.
How do capacitive touchscreens commonly detect input?
A By measuring Wi-Fi signals
B By reading a SIM profile
C By sensing magnetic storage
D By detecting changes in capacitance
Answer: D. By detecting changes in capacitance. Capacitive screens detect touch through changes in an electrical field or capacitance.
What does a display refresh rate describe?
A Frames refreshed each second
B Stored pixels per inch
C Battery charge cycles
D Cellular signal strength
Answer: A. Frames refreshed each second. Refresh rate is the number of times a display updates per second.
How can tokenization protect mobile payment account data?
A Replaces the terminal
B Substitutes account data
C Increases NFC range
D Stores a face image
Answer: B. Substitutes account data. Payment tokenization replaces sensitive account information with a substitute value for transactions.
Which tasks can mobile device management support?
A Compressing mobile photos
B Measuring cellular signal
C Managing configured devices and policies
D Creating application icons
Answer: C. Managing configured devices and policies. MDM helps organizations configure, manage, and apply policies to enrolled mobile devices.
What does BYOD mean in workplace technology?
A Buy Your Own Data
B Build Your Online Dashboard
C Bring Your Office Device
D Bring Your Own Device
Answer: D. Bring Your Own Device. BYOD means employees use their own devices for work under organizational policies.
How does cloud sync help across a user’s devices?
A Keeps selected data aligned
B Raises screen brightness
C Improves cellular coverage
D Reduces camera resolution
Answer: A. Keeps selected data aligned. Cloud sync keeps selected data aligned across devices using a cloud service.
Why create a mobile-device backup?
A Raises screen brightness
B Restores lost data
C Improves cellular coverage
D Reduces camera resolution
Answer: B. Restores lost data. A backup provides a copy of data that can be restored after loss, damage, or replacement.
Which connector is common on many modern mobile devices?
A VGA
B PS/2
C USB Type-C
D Serial ATA
Answer: C. USB Type-C. USB Type-C is a widely used connector on current mobile devices, though capabilities vary by device.
What type of communication is Bluetooth Low Energy designed to support?
A Long-distance satellite calling
B High-power video transmission
C Wired storage connections
D Low-power nearby communication
Answer: D. Low-power nearby communication. Bluetooth Low Energy supports short-range wireless communication designed for low power use.
How can a phone connect to a nearby wireless access point?
A Joins a nearby Wi-Fi network
B Reads a SIM profile
C Measures device temperature
D Controls screen refresh
Answer: A. Joins a nearby Wi-Fi network. Wi-Fi connects a phone to a wireless local network and often to Internet access.
What can location permission control in a mobile app?
A Camera lens access
B Device location access
C Battery temperature access
D Screen refresh access
Answer: B. Device location access. Location permission governs an app’s access to device location information.
How can an app detect a phone’s orientation?
A By reading the SIM number
B By measuring network latency
C By using motion sensors
D By checking storage capacity
Answer: C. By using motion sensors. Motion sensors such as accelerometers and gyroscopes can provide data used to estimate device orientation.
What transfers energy to a phone during wireless charging?
A Data through a SIM profile
B Images through a camera
C Voice over cellular radio
D Electrical energy without a cable
Answer: D. Electrical energy without a cable. Wireless charging transfers electrical energy without a direct cable connection.
What does cross-platform mobile development aim to support?
A Multiple operating systems
B Only one screen size
C Only one network carrier
D One hardware model
Answer: A. Multiple operating systems. Cross-platform development targets more than one mobile operating-system platform.
Which component manages a mobile device’s cellular radio communication?
A Cellular radio communication
B Photo library organization
C Screen color calibration
D Cloud account billing
Answer: A. Cellular radio communication. A baseband processor handles cellular radio functions such as communication with mobile networks.