Practice 300-915 Exam Online

Question 1

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 massage to the broker.

Answer: D

Question 2

Refer to the exhibit.

Which two statements about MQTT messaging are true? (Choose two.)

A : Result code 5 means the connection is accepted; result code 0 means the connection is "refused, not authorized".

B : Redundant ClientIDs 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.

Answer: A,D

Question 3

After an application is deployed, potential issues arise around connectivity. As part of the troubleshooting

process, the IP address must be determined to ensure end-to-end communication.

Which method provides the required details using the Cisco IOx CLI?

A :

B :

C :

D :

Answer: D

Question 4

Refer to the exhibit.

While troubleshooting an error on an application descriptor for a Docker app in Cisco IOx (package.yaml), the

app type appears to be missing. Which app type must be added to the snippet to resolve the issue?

A : paas

B : docker-vm

C : docker

D : docker-app

Answer: C

Question 5

Refer to the exhibit.

The code and the error message that are received when the code is run is presented. What causes issues

authenticating with Cisco GMM API using the web-generated API key?

A : firewall that blocks authentication ports

B : incorrect username and password

C : incorrect GMM Cluster selection

D : incorrect key size and data encryption

Answer: B

Name:	Developing Solutions using Cisco IoT and Edge Platforms
Exam Code:	300-915
Certification:	Cisco Certified DevNet Professional
Vendor:	Cisco
Total Questions:	60
Last Updated:	Apr 22, 2024

Cisco 300-915