Internet of Things (IoT) Practice Exam

What is a common use case for an RFID tag in IoT?

1. Monitoring environmental changes

2. Tracking inventory

3. Controlling light systems

4. Detecting motion

The correct answer is: Tracking inventory

Using RFID tags for tracking inventory is a prevalent application in IoT systems. RFID, or Radio-Frequency Identification, utilizes electromagnetic fields to automatically identify and track tags attached to objects. Each tag contains a unique identifier that can be read by an RFID reader from a distance. This capability enables businesses to efficiently manage and monitor their inventory levels, streamline their supply chain processes, and reduce human error associated with manual inventory checks. The value of RFID tags lies in their ability to provide real-time data on the location and status of items in inventory, making it easier for organizations to maintain accurate records and optimize stock levels. This enhances operational efficiency, minimizes loss due to mismanagement, and ensures that the right products are available when needed. Other options, while relevant to IoT applications, do not particularly leverage the unique functionalities of RFID technology in the same manner. For example, monitoring environmental changes typically involves sensors that measure variables such as temperature or humidity, which is distinct from the tracking function of RFID. Similarly, controlling light systems may involve smart lighting technology without the need for RFID, and detecting motion usually requires different types of sensors like passive infrared or ultrasonic sensors rather than RFID.