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| Type | Number of exam questions | Exam name | Exam code |
| Free | 15 | Developing Solutions using Cisco IoT and Edge Platforms (DEVIOT) | 300-915 |
Question 1:
DRAG DROP
An application needs to calculate if the product meets a determined quality specification, activate automation to remove poor-quality products, and report detailed results back to the cloud. All data are captured from an application that is connected to a sensor. Using the SDK of the cloud provider, drag and drop the tasks that must be completed from the left to the right. Not all options are used.
Select and Place:
Correct Answer:
Question 2:
DRAG DROP
The network team of a large international airport is creating a sensor network on their site using the Cisco LoRaWAN solution. Drag and drop the actions from the left to right needed to implement this project. Not all options are used.
Select and Place:
Correct Answer:
Reference: https://www.cisco.com/c/en_in/solutions/internet-of-things/lorawan-solution.html#~stickynav=3
Question 3:
DRAG DROP
Drag and drop the Dockerfile instructions from the left onto the correct arguments on the right.
Select and Place:
Correct Answer:
Question 4:
DRAG DROP
Drag and drop the tasks from the left into the correct order on the right for transporting data from sensors to the cloud, in order to extract the machine data and use the cloud-based analytics for predictive maintenance.
Select and Place:
Correct Answer:
Question 5:
A company is collecting data from several thousand machines globally. Which software component in the overall architecture is the next destination of the dataflow after the data has been gathered and normalized on the edge data software?
A. relational database: MySQL
B. historian database: influx DB
C. message broker: Apache Kafka
D. dashboard: Node.js web app
Correct Answer: B
Question 6:
Which data visualization technique should be used to represent an important single metric on a dashboard?
A. heatmap
B. scatter pot
C. gauge
D. treemap
Correct Answer: C
Question 7:
When trying to subscribe to an MQTT broker on the internet, the MQTT client is on a private subnet and must be NATed to reach the public broker.
What is the expected outcome when this configuration is in place?
A. The client periodically reconnects to the default gateway.
B. The client connects only once using the PENDING message to the broker.
C. The client periodically reconnects to the broker over the NAT connection.
D. The client connects only once using the CONNECT message to the broker.
Correct Answer: D
Question 8:
Which two states are applications expected to be seen in when they are managed on Cisco IOx? (Choose two.)
A. DEACTIVATED
B. ACTIVATED
C. ALLOWED
D. STOPPED
E. VALIDATED
Correct Answer: BD
Question 9:
Which connector is southbound?
A. horizontal connector
B. cloud connector
C. device connector
D. universal connector
Correct Answer: C
Question 10:
When constructing a Python script for data extraction using GMM APIs on a Cisco Kinetic Cloud platform, how should the API authentication be implemented?
A. Generate the API keys once and edit the permissions as needed.
B. Generate and use the API keys for the required access level from the Kinetic Cloud application.
C. Use a complex username and password with 128-bit encryption.
D. Use a complex username with an auto-generated password from the Kinetic Cloud application.
Correct Answer: B
Question 11:
Which statement explains the correct position of a PLC within the CPwE architecture?
A. PLCs are always part of Level 0 ? process control.
B. PLCs are part of Level 4 ? site business planning.
C. PLCs are part of Level 1 ? basic control.
D. PLCs are placed at Level 2 ? area supervisory control.
Correct Answer: C
Question 12:
A sensor reads potentially critical data from an industrial device, but most of the data from the sensor is not critical information and does not change unless a critical event happens.
Which data workflow is appropriate for how the critical and non-critical data are processed?
A. 1. Acquire sensor data.
2.
Filter non-actionable data.
3.
Perform action on data.
4.
Send critical data and action performed on data to the cloud for storing.
B. 1. Acquire sensor data.
2.
Send data to the cloud for processing and to determine action.
3.
Send required action back to the edge for action completion.
4.
Perform action on data.
C. 1. Acquire sensor data.
2.
Filter non-actionable data.
3.
Perform action on data.
D. 1. Acquire sensor data.
2.
Perform action on data.
3.
Send data and action performed on data to the cloud for recording.
Correct Answer: D
Question 13:
Refer to the exhibit. When a Docker image is built using this Dockerfile, which two statements are valid on Cisco IOx 1.8 and before? (Choose two.)
A. It builds an image that can be executed on all Cisco platforms.
B. It builds a Docker image that cannot be used directly on Cisco IOx.
C. It compiles a “hello world” program in C.
D. It creates two separate images.
E. It builds an IOx package that can be deployed directly.
Correct Answer: BC
Question 14:
When an RS232 device is connected to a Cisco IR829 router, the data collected is not being parsed correctly by the edge application.
Which two steps should be taken to troubleshoot the issue? (Choose two.)
A. SSH access on the Cisco IR829 router must be enabled for IOx Guest OS.
B. Communication mode must be set to half duplex over a serial connection.
C. Serial cable length should not exceed 1.5 meters.
D. Ensure that communication parameters like baud rate and parity are set correctly.
E. Set the cable connections based on the PIN layout from the sensor vendor.
Correct Answer: DE
Question 15:
Refer to the exhibit. Which two statements about MQTT messaging are true? (Choose two.)
A. Result from code 5 means the connection is accepted; result code 0 means the connection is “refused, not authorized”.
B. Redundant client IDs are supported by MQTT brokers.
C. MQTT does not support a “keep alive” functionality because it runs on top of TCP.
D. Result code 0 means the connection is accepted; result code 5 means the connection is “refused, not authorized”.
E. Brokers can send the Last Will and Testament messages on behalf of the client.
Correct Answer: DE
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