ICT - Information Communication Technology Mobile and IoT Devices Questions and Answers — Questions and Answers
Question 1: A user wants to make a contactless payment at a point-of-sale terminal using their smartphone. Which wireless technology enables this short-range communication by bringing the phone close to the reader?
- Bluetooth
- Wi-Fi Direct
- NFC (Near Field Communication) (Correct answer)
- Infrared (IR)
Correct answer: NFC (Near Field Communication)
NFC (Near Field Communication) is a short-range wireless technology designed for communication between two devices within a few centimeters of each other. This makes it ideal and secure for 'tap-to-pay' mobile payment systems.
Question 2: In an Internet of Things (IoT) ecosystem, which component is responsible for collecting data from the physical environment, such as temperature, motion, or light levels?
- Sensor (Correct answer)
- Actuator
- Gateway
- Controller
Correct answer: Sensor
A sensor's primary role in an IoT system is to detect and measure physical properties or changes in the environment and convert them into a digital signal that can be processed.
Question 3: A smartphone can automatically switch its display orientation from portrait to landscape when turned sideways. Which internal component is responsible for detecting this change in the device's tilt and orientation?
- GPS (Global Positioning System)
- Magnetometer
- Accelerometer (Correct answer)
- Proximity Sensor
Correct answer: Accelerometer
An accelerometer is a sensor that detects acceleration, which includes the constant force of gravity. By measuring the direction of gravitational pull, it can determine the device's physical orientation and signal the operating system to rotate the screen.
Question 4: Which of the following is a key characteristic of the Android operating system that distinguishes it from iOS in terms of software distribution?
- It is a completely closed-source operating system.
- It exclusively uses one official, curated app store for all software.
- It does not support widgets on the home screen.
- It allows users to install applications from third-party sources, a process known as 'sideloading'. (Correct answer)
Correct answer: It allows users to install applications from third-party sources, a process known as 'sideloading'.
Android's open nature allows users to enable 'sideloading,' which is the installation of application APK files from sources other than the official Google Play Store. iOS, by default, restricts app installations to its official App Store for security and control.
Question 5: An IT department needs to enforce security policies, deploy applications, and remotely wipe lost or stolen company-owned smartphones. Which type of system provides this centralized control over a fleet of smartphones and tablets?
- Mobile Device Management (MDM) (Correct answer)
- Customer Relationship Management (CRM)
- Intrusion Detection System (IDS)
- Enterprise Resource Planning (ERP)
Correct answer: Mobile Device Management (MDM)
Mobile Device Management (MDM) is software used by IT departments to monitor, manage, and secure mobile devices such as smartphones and tablets. It allows administrators to enforce security policies, distribute applications, and perform remote actions like locking or wiping a device.
Question 6: A smart home requires numerous low-power devices like light bulbs, door locks, and thermostats to be connected in a single, reliable mesh network. Which of the following low-power, short-range wireless protocols is specifically designed for this type of home automation network?
- 5G Cellular
- Zigbee (Correct answer)
- Wi-Fi (802.11ax)
- LoRaWAN
Correct answer: Zigbee
Zigbee is a wireless protocol based on the IEEE 802.15.4 standard, created specifically for low-power, low-data-rate applications like home automation. It excels at creating mesh networks where devices can relay signals for each other, extending network range and reliability.
ICT - Information Communication Technology Mobile and IoT Devices Questions and Answers
A user wants to make a contactless payment at a point-of-sale terminal using their smartphone.
Which wireless technology enables this short-range communication by bringing the phone close to the reader?