ICT Mobile and IoT Devices 4 — Questions and Answers
Question 1: A technician is troubleshooting a tablet that won't charge. The device shows charging with an OEM cable but not a third-party one. What is the most likely cause?
- Faulty battery
- USB controller failure
- Third-party cable lacks proper wattage/data pins (Correct answer)
- Operating system corruption
Correct answer: Third-party cable lacks proper wattage/data pins
Many devices require cables with specific resistance markers or data pins to negotiate fast charging, and cheap third-party cables may lack these.
Question 2: What is the primary function of a GPS chipset in a smartphone compared to network-based location?
- Faster location fix indoors
- Uses satellite signals for accurate outdoor positioning without cellular data (Correct answer)
- Requires less battery power than Wi-Fi positioning
- Provides location in airplane mode via cell towers
Correct answer: Uses satellite signals for accurate outdoor positioning without cellular data
GPS uses signals from satellites to determine precise location outdoors and works independently of cellular networks.
Question 3: Which IoT architecture model processes data locally on the device rather than sending everything to the cloud?
- Cloud computing
- Edge computing (Correct answer)
- Grid computing
- Centralized processing
Correct answer: Edge computing
Edge computing processes data at or near the source device, reducing latency and bandwidth usage compared to cloud-only architectures.
Question 4: A user reports their Android phone is displaying ads even when no apps are open. What is the most likely cause?
- Browser cache corruption
- Adware installed via sideloaded APK (Correct answer)
- Outdated Google Play Services
- SIM card malware
Correct answer: Adware installed via sideloaded APK
Adware from sideloaded apps (installed outside the Play Store) can display overlay ads system-wide even when the host app is not in the foreground.
Question 5: What is the purpose of WPA3-SAE in wireless networking for IoT devices?
- Increases Wi-Fi range for IoT sensors
- Provides stronger password-based authentication resistant to offline dictionary attacks (Correct answer)
- Enables mesh networking between IoT devices
- Compresses IoT data packets for efficiency
Correct answer: Provides stronger password-based authentication resistant to offline dictionary attacks
WPA3's SAE (Simultaneous Authentication of Equals) replaces PSK handshakes and prevents offline brute-force attacks on captured handshakes.
Question 6: Which Android permission group must an app explicitly request to access the device's precise GPS location in the foreground?
- android.permission.INTERNET
- android.permission.ACCESS_FINE_LOCATION (Correct answer)
- android.permission.READ_CONTACTS
- android.permission.CAMERA
Correct answer: android.permission.ACCESS_FINE_LOCATION
ACCESS_FINE_LOCATION is a dangerous permission that grants access to precise GPS coordinates and must be explicitly granted by the user.
Question 7: A company wants to allow employees to use personal phones for work while keeping corporate data in an isolated container. What solution achieves this?
- Full device encryption
- BYOD with containerization (e.g., Samsung Knox) (Correct answer)
- Factory reset protection
- Remote wipe of the entire device
Correct answer: BYOD with containerization (e.g., Samsung Knox)
Containerization creates a separate encrypted workspace on a personal device where corporate apps and data are isolated from personal content.
ICT Mobile and IoT Devices 4
A technician is troubleshooting a tablet that won't charge.
The device shows charging with an OEM cable but not a third-party one.
What is the most likely cause?