IOT Cheat Sheet 2026

The 30 highest-yield IOT facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. Which IoT cloud platform feature enables 'over-the-air' (OTA) firmware updates for large device fleets? → IoT Jobs (AWS) / Device Update for IoT Hub (Azure)
2. Which machine learning technique is commonly used in IoT predictive maintenance to forecast equipment failure? → Regression analysis and classification models
3. Which IoT architectural pattern separates the 'thing' from its 'internet' representation, enabling offline operation? → Device shadow/digital twin pattern
4. Which process involves registering an IoT device with a management platform for the first time? → Device provisioning
5. What does 'network segmentation' mean in an IoT deployment context? → Isolating IoT devices on a separate network from critical business systems
6. What is the primary purpose of AWS IoT Rules Engine? → Routing and filtering IoT messages to AWS services based on SQL-like queries
7. Which US state passed the first IoT-specific cybersecurity law (SB-327) requiring reasonable security features in connected devices? → California
8. What does MQTT stand for in IoT communications? → Message Queuing Telemetry Transport
9. What is the primary advantage of the AMQP protocol over MQTT in enterprise IoT deployments? → Richer message routing, queuing, and enterprise broker features
10. What is the purpose of a device registry in IoT management? → To maintain a catalog of all IoT devices with their identities and metadata
11. Which standard governs the HART (Highway Addressable Remote Transducer) protocol used in industrial IoT? → HART Communication Foundation Standard
12. Which design pattern involves IoT devices publishing data to a central message broker that distributes it to interested subscribers? → Publish-Subscribe (Pub/Sub)
13. Which of the following is a key function of an IoT Device Management Platform? → Remote device monitoring, configuration, and firmware updates
14. Which edge computing concept involves training a shared machine learning model across multiple IoT edge devices without centralizing raw data? → Federated learning
15. Which cryptographic concept ensures that an IoT device's firmware has not been tampered with since it was signed? → Code signing
16. In a three-tier IoT architecture, what function does the 'middleware' or 'platform' tier serve? → Data aggregation, storage, processing, and providing APIs to the application tier
17. Total elements in the Open IoT architecture is _________. → 7
18. Which scenario presents a unique challenge for developers of mobile applications? → Selecting multiple items from a list
19. State whether true or false: An IoT network is a collection of interconnected devices. → True
20. Which type of IoT analytics recommends actions to optimize outcomes based on predictive model outputs? → Prescriptive analytics
21. With the use of Mobile IP, which device is responsible for keeping track of mobile nodes (MNs) and forwarding packets to the MN's current network? → Home agent
22. Which IoT protocol uses a RESTful architecture and is designed for constrained devices, often compared to a lightweight HTTP? → CoAP
23. What is a 'botnet' in the context of IoT security threats? → A network of compromised IoT devices controlled by an attacker
24. Which of the following IoT gateway must provide? → Protocol abstraction
25. Identify among the following which is not a fundamental component of IoT system? → Transformers
26. What is fleet management in the context of IoT? → Centralized management of a large group of IoT devices as a collective
27. What does 'decommissioning' mean in the IoT device lifecycle? → Securely retiring and removing a device from the network
28. Which statistical method is commonly used to detect gradual drift or degradation in IoT sensor performance over time? → Statistical process control (SPC) with control charts
29. Which attack type floods an IoT device or network with traffic to make it unavailable to legitimate users? → Denial of Service (DoS)
30. What is the AWS IoT SiteWise service specifically designed for? → Collecting, organizing, and analyzing data from industrial equipment and processes