QUESTION 181
How do XML and JSON compare regarding functionality?
A. XML provides more human readability than JSON.
B. JSON natively supports arrays and XML does not natively support arrays.
C. XML provides support for mapping data structures into host languages than JSON.
D. JSON provides support for data types than XML.
Correct Answer: B
QUESTION 182
A developer creates a program in which an object maintains a list of classes based on the observer pattern. The classes are dependent on the object Whenever the state of the object changes, it notifies the dependent classes directly through callbacks. Which advantage of the observer pattern offers minimum dependencies and maximum flexibility between dependent objects or classes?
A. Mediation
B. Cohesion
C. loose coupling
D. tight coupling
Correct Answer: C
QUESTION 183
Which protocol runs over TCP port 830?
A. RESTCONF
B. HTTP
C. NETCONF
D. Telnet
Correct Answer: C
QUESTION 184
A developer writes an application that refines data in temporary secure file storage hosted on the public cloud. Data will be deleted after processing and does not contain any private information. What is the advantage that a public cloud deployment provides to the developer?
A. bespoke services
B. ease in infrastructure management
C. flexible development
D. high security with encryption
Correct Answer: B
QUESTION 185
Before which process is code review performed when version control is used?
A. committing code
B. branching code
C. merge of code
D. checkout of code
Correct Answer: C
QUESTION 186
What is a benefit of using edge computing in an IoT implementation?
A. low network design complexity
B. low cost in network design
C. high availability for network components
D. high speed in data processing
Correct Answer: D
QUESTION 187
Which Cisco platform provides organization-wide automation, security, policy enforcement, and agility across wired and wireless networks?
A. Cisco SD-WAN
B. Cisco ACI
C. Cisco Umbrella
D. Cisco DNA Center
Correct Answer: D
QUESTION 188
Which platform has an API that has the capability to obtain a list of vulnerable software on user devices?
A. Cisco Umbrella
B. Cisco Firepower
C. Cisco identity Services Engine
D. Cisco Advanced Malware Protection
Correct Answer: D
QUESTION 189
A new application is being developed with specific platform requirements. The platform and application deployment and the ongoing platform management must be fully automated. The application includes a large database component that has significant disk I/O requirements. Which application deployment type meets the requirements?
A. virtual machine
B. bare metal
C. Python virtual
D. environment container
Correct Answer: D
QUESTION 190
A resource named item is protected by OAuth2 authentication. An endpoint named login must request authentication. Which method must be used to access the resource by using the REST API?
A. Make a GET call to /login that includes the username and password, and retrieve a token to insert into the /item call
B. Make a GET call to /item, then make a call to /login that includes the username and password in the body of the message, and wait for the authorization code.
C. Make a POST call to /login including the user credentials in the message, and retrieve a token to insert into the authorization header of the /item call
D. Make a POST call to /item that includes the username and password in the body of the request message, and submit it to request access
Correct Answer: C
QUESTION 191
What is a capability of an agentless configuration management system?
A. It uses compiled languages as the basis of the domain-specific language to interface with managed hosts.
B. It requires managed hosts to have an interpreter for a high-level language such as Python or Ruby.
C. It uses existing protocols to interface with the managed host.
D. It requires managed hosts to connect to a centralized host to receive updated configurations.
Correct Answer: C
QUESTION 192
What are two use cases where webhooks are effective? (Choose two.)
A. Close a session with a web server after a specific amount of time.
B. Change the response format or content type of an API call.
C. Inform a previously defined chat channel after a deployment fails.
D. Send an email to a customer of an online store after payment is complete.
E. Filter out information from a response to an API call.
Correct Answer: CD
QUESTION 193
A developer checks the performance of a web application. The application is in the local data center and uses a REST-based API. Based on the API logs, it is discovered that many users abandon API requests. Also, the response is taking too long to get back. What is the reason for this issue?
A. Pagination is not implemented.
B. Rate limiting is not implemented.
C. Token-based authentication is disabled.
D. Token-based authentication is enabled.
Correct Answer: A
QUESTION 194
Which HTTP status code means that the server cannot or will not process the request because of a perceived client error?
A. 100
B. 203
C. 303
D. 400
Correct Answer: D
QUESTION 195
What is a characteristic of RPC APIs compared to REST APIs?
A. Authentication is done over provisions for the service caller and vice versa for RPC API, and REST API uses HTTP headers for authentication.
B. All communications between the client and server must be stateless for RPC API, and REST API is stateful.
C. The architecture model for RPC API is resource-focused, and REST API is procedure-focused.
D. The data payload must be in JSON format for RPC API, and REST API allows JSON and XML formats.
Correct Answer: A
QUESTION 196
Which API must an engineer use to change a netmask on a Cisco IOS XE device?
A. Meraki
B. SD-WAN
C. DNAC
D. RESTCONF/YANG
Correct Answer: D
QUESTION 197
What is a benefit of a CI/CD pipeline for infrastructure?
A. removes manual errors
B. provides variety for deployments
C. removes the need for operations
D. enables manual steps
Correct Answer: A
QUESTION 198
What does a load balancer distribute in a network environment?
A. outgoing connections to the network
B. incoming traffic across multiple servers
C. traffic in the network by leveraging the switch architecture
D. different TCP connections to the routers
Correct Answer: B
QUESTION 199
A developer is running an application that connects to the Cisco website and collects data. The application will be hosted in a local data center and the data will need to be collected on a frequent basis. The application client requires certain environmental variables to be set before the run. Which Bash command sets the environmental variables for a Linux system?
A. WEBSITE=”cisco.com”
B. “cisco.com”=WEBSITE
C. export website=”cisco.com”
D. export 1var=23
Correct Answer: C
QUESTION 200
Which HTTP method is used by webhooks and notifies a listener about an event change?
A. PATCH
B. POST
C. GET
D. PUT
Correct Answer: B