Developing Solutions Using Cisco IoT and Edge Platforms (DEVIOT) Free Sample Questions

The correct command sequence first enters IOx configuration mode with 'iox'. Then, it configures the default application hosting settings, including the virtual network interface card (app-vnic), default gateway, IP address for the application, and resource profiles for CPU, memory, and disk. The other options are incomplete or use incorrect syntax for defining the application resources and networking.

The correct GMM API endpoint to obtain an authentication token is a POST request to /api/v1/token. This request typically includes user credentials (username and password) in the body, and the response contains the JWT (JSON Web Token) used to authenticate all subsequent API calls. The other endpoints are for different functions like deploying applications or are incorrectly formatted.

Using docker buildx is the modern and recommended way to build multi-architecture Docker images. The --platform flag allows specifying target architectures like linux/arm64.

Specifying the platform in the FROM instruction ensures that the correct base image for the target architecture is pulled. This is crucial for cross-compiling applications.

In Cisco Edge Intelligence, the Southbound Connectors, implemented as DSLinks, are responsible for communicating with edge devices and sensors. They acquire data using native protocols like Modbus and perform the initial normalization, converting the raw data into a standardized format (like JSON) for the data logic engine to process.

This statement is false. Static Application Security Testing (SAST) is used to analyze source code, byte code, or binaries for vulnerabilities before compilation or while at rest. Dynamic Application Security Testing (DAST) analyzes a running application for vulnerabilities by simulating external attacks, without needing access to the source code.

MQTT is designed for low-power, constrained devices and unreliable networks, making it ideal for this scenario. QoS level 1 (At Least Once) ensures that the message is guaranteed to be delivered by requiring an acknowledgment (PUBACK) from the broker. If the client doesn't receive the acknowledgment, it will resend the message, which handles the intermittent connectivity issue. QoS 2 is overkill and adds more overhead, while QoS 0 provides no delivery guarantee.

A gauge is specifically designed to display a single metric's current value in relation to a set range. By setting color-coded thresholds for safe (green), warning (yellow), and critical (red) ranges, the operations team can immediately assess the temperature status of a machine at a glance. A line graph is better for trends over time, a pie chart for proportions, and a bar chart for comparing discrete values.

LoRaWAN (Long Range Wide Area Network) is a communication protocol specifically designed for low-power, long-range communication between IoT devices (sensors) and a central gateway. The LoRaWAN Gateway is the component that receives the wireless signals from the sensors and forwards the data to the rest of the network via a standard connection like Ethernet, which is then handled by the switch and router.

For applications like real-time video analytics, latency is a critical factor. Processing video feeds at the edge eliminates the delay of sending large amounts of data to a centralized cloud, waiting for processing, and receiving a response. This allows for immediate actions and decisions, such as stopping a machine in case of a safety violation. While other factors like data storage and bandwidth costs are benefits of edge computing, minimizing latency is the primary driver for this type of application.

The resources section of the package.yaml file is where an application's requirements are defined. This includes not only CPU and memory but also devices (like serial ports) and volumes for persistent storage. The network section defines networking aspects, health-check defines monitoring, and app-config is for application-specific environment variables.