200-901 PDF Dumps

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Cisco
200-901 Developing Applications and Automating
Work?ows using Cisco Core Platforms QUESTION
ANSWERS
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QUESTION 1
Refer to the exhibit.

• An administrator attempts to perform a GET
  operation by using the Cisco IOS XE RESTCONF API
  to return the hostname of a device. The sequence
  diagram in the exhibit illustrates the HTTP
  messages observed. Which change to the API
  request resolves the issue?
• Remove the -H 'Accept application/yang-datajson'
  header.
• Replace -u ciscocisco parameter with -u
  'ciscocisco'.
• Change the request method from -X 'GET' to -X
  'POST'.
• Add the -H 'Content-Type application/yang-datajs
  on' header.

Correct Answer B
QUESTION 2

• How does edge computing analyze sensitive data in
  the context of privacy control?
• locally instead of sending the data to the cloud
  for analysis
• locally or on the cloud depending on the
  configuration
• all at once by sending the data to the cloud
• all at once by sending the data to the cloud

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Correct Answer A
QUESTION 3

• Which command reverses the last commit without
  changing the index file or the working tree
  position?
• git revert HEAD
• git reset --hard HEAD3
• git reset --soft HEAD
• git revert

Correct Answer C
QUESTION 4

• An engineer deploys a Cisco CSR 1000 V instance
  to a virtual machine. The engineer must output
  the device configuration in JSON format. Which
  protocol is used for this task?
• YANG
• NETCONF
• SNMP
• RESTCONF

Correct Answer D
QUESTION 5

• Refer to the exhibit.
• Which command, including arguments, is executed
  when the container starts?
• /bin/sh -c '/bin/sleep 30 nginx -g 'daemon
  off''
• /bin/sh -c '/bin/sleep 10 nginx -g 'daemon
  off''
• /bin/bash -c '/bin/sleep 30 nginx -g 'daemon
  off''
• /bin/sh -c '/bin/sleep 30' nginx -g 'daemon
  off'

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Correct Answer A
QUESTION 6

• Into which type of Python data structure should
  common data formats be parsed?
• sequence
• set
• dictionary
• list

Correct Answer C
QUESTION 7

• What are two benefits of using VLANs? (Choose
  two.)
• limits the devices that can join the network
• segments the broadcast domain
• extends the broadcast domain
• allows all network devices to be accessible from
  any host on the network
• enables the logical grouping of devices that
  belong to different Layer 2 devices

Correct Answer B,E
QUESTION 8

• What is a benefit of a model-driven approach for
  infrastructure automation?
• enforces the generation of all automation scripts
  through the modeling environment
• provides a small learning curve and helps system
  administrators with limited coding experience
• ensures that system administrators gain a good
  understanding of coding and expand their
  experience and capabilities
• enables a user to understand a declarative
  language to translate the model into an
  actionable script

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Correct Answer A
QUESTION 9

• What is the purpose of a firewall in application
  deployment?
• adds TLS support to an application that does not
  support it natively
• forwards traffic to a pool of instances of the
  application
• provides translation for an application's
  hostname to its IP address
• limits traffic to only ports required by the
  application

Correct Answer D
QUESTION 10
Refer to the exhibit.
A developer cannot reach the web application
behind an NGINX load balancer. The developer
sends a request to an application FQDN with cURL
but gets an HTTP 502 response. Which action
solves the problem? A. Fix errors in the server
configuration, which is behind the load balancer.
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1. Bring up the load balancer to the active state.
2. Fix errors in the cURL request sent by the
   client.
3. Change the default gateway on the load balancer
   to an active one.

Correct Answer A
Explanation/Reference The HyperText Transfer
Protocol (HTTP) 502 Bad Gateway server error
response code indicates that the server, while
acting as a gateway or proxy, received an invalid
response from the upstream server. https//develo
per.mozilla.org/en-US/docs/Web/HTTP/Status/502
textThe HyperText Transfer Protocol
(HTTP,response from the upstream server
QUESTION 11

• A team of developers is responsible for a network
  orchestration application in the company. The
  responsibilities also include
• developing and improving the application in a
  continuous manner deployment of the application
  and management of CI/CD frameworks
• monitoring the usage and problems and managing
  the performance improvements Which principle
  best describes this DevOps practice?
• responsible for IT operations
• automation of processes
• end-to-end responsibility
• quality assurance checks

Correct Answer C
QUESTION 12

• What is a difference between a synchronous API
  and an asynchronous API?
• An asynchronous API can make offline calls while
  synchronous APIs do not have this capability.
• Synchronous API calls are returned immediately
  while asynchronous calls do not guarantee an
  immediate response.
• Synchronous API calls require an authentication
  header to be sent while asynchronous calls do not
  require authentication.
• An asynchronous API can make a larger number of
  calls in a specified time period than a
  synchronous API.

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Correct Answer B
QUESTION 13
Refer to the exhibit. Drag and drop the code
snippets from the bottom onto the blanks in the
Python script to retrieve a list of network
devices from Cisco DNA Center. Not all options
are used.
Correct Answer
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QUESTION 14
Refer to the exhibit.
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Refer to the exhibit. Drag and drop the code from
the bottom onto the box where the code is missing
to construct a request that generates a security
token and gets a list of network devices. Not all
options are used.
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Correct Answer
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QUESTION 15
Refer to the exhibit.

• Refer to the exhibit. A network engineer executes
  the bash script shown. Which two things are
  achieved by running the script? (Choose two.)
• A directory called PRODUCTION is created.
• The engineer changes to the parent directory.
• A YAML file is created.
• A YAML file is removed.
• A directory called state.yml is created.

Correct Answer A,C
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QUESTION 16

• What is a feature of XML compared to other data
  formats?
• It uses tags to define the structure.
• It uses parenthesis for key-value pairs.
• It uses indentation to define the structure.
• It uses namespaces for list representation.

Correct Answer A
QUESTION 17
Refer to the exhibit.

• What are two characteristics of the NETCONF
  response? (Choose two.)
• ospf is defined by the ietf-ospf module.
• ietf-ospf imports ietf-routing.
• redistribution is a module of type cisco-ospf.
• routing protocols is a list.
• The main module is routing.

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Correct Answer B,C
QUESTION 18
Refer to the exhibit.

• While developing a Cisco Webex bot, an
  application reaches the public IP address of the
  firewall, but traffic is forwarded to the IP
  address of server 1 instead of the IP address of
  server 2. What causes this issue?
• The proxy server that rewrites traffic is
  misconfigured.
• The router is sending the traffic to server 1
  instead of server 2.
• The switch is forwarding IP traffic to the wrong
  VLAN.
• NAT is misconfigured on the firewall.

Correct Answer D
QUESTION 19
Refer to the exhibit. An engineer is comparing
two files by using the unified diff format. Which
cade snippet belongs to the new.py file?
A. B.
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C.
D.
Correct Answer A
QUESTION 20
Drag and drop the code from the bottom onto the
box where the code is missing to complete the
error path scenario. Not all options are used.
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Correct Answer
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QUESTION 21

• What is a benefit of a distributed version
  control system?
• encourages users to commit small places of work
  to the system more frequently
• ensures that all code meets minimum standards
  before being committed to the system
• allows users to work on the codebase even when
  not connected to the Internet
• ensures that all code is tested before being
  committed to the system

Correct Answer C
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QUESTION 22

• Which model-driven programmability protocol does
  Cisco IOS XE Software support?
• CORBA
• SSH
• gNMI
• SOAP

Correct Answer C
QUESTION 23

• Which way should be used to safely the API keys?
• In an environment variable unique to the system
  database
• Encrypted in a configuration file that is
  separate from the code
• Encrypted in the code in a function
• Plain text in the code as a constant

Correct Answer B
QUESTION 24

• Which API must an engineer use to change a
  netmask on a Cisco IOS XE device?
• Meraki
• RESTCONF/YANG
• SD-WAN
• DNAC

Correct Answer B
QUESTION 25
Refer to the exhibit.
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• Refer to the exhibit. What does the load balancer
  enable in the network topology?
• hosted application to access Internet services
• external requests to be routed to the application
  servers
• workstations to access the Internet
• application to access the database server

Correct Answer C
QUESTION 26
Refer to the exhibit.
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Drag and drop the descriptors from the left onto
the correct parts of the API request and response
on the right.
Correct Answer
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QUESTION 27
Refer to the exhibit.

• Up to which device does the communication server
  1 and server 2 go?
• device B
• device C
• device D
• device E

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Correct Answer C
QUESTION 28
Refer to the exhibit.

• A collaboration engineer has developed a script
  to automate the gathering of information by
  providing the email address of the individual.
  When the engineer tests the script, a 401 error
  is received. Which command fixes the script?
• Add 'Authorization' 'Bearer ' to the headers
• Add 'Authentication' 'Basic ' in the base_url
  after 'https//'.
• Add '_at_' in the base_url after 'https//'.
• Add 'Authentication' 'Bearer ' to the headersA

Correct Answer A
QUESTION 29
Drag and drop the code from the bottom onto the
box where the code is missing to authenticate
with the Cisco DNA Center REST API by using
basic authentication. Then generate a token for
later use. Not all options are used.
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Correct Answer
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QUESTION 30

• In python, which expression checks whether the
  script returns a success status code when the
  Requests library is used?
• response.status_code requests.ok
• response.status_code requests.codes.ok
• response.code requests.codes.ok
• response.status_code ! requests.codes.ok

Correct Answer B
QUESTION 31
Refer to the exhibit.
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Drag and drop the code from the left code from
the left onto the item number on the right to
complete the Meraki code to obtain a list of
client which have used this network.
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Correct Answer
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QUESTION 32

• Which service provides a directory lookup for IP
  addresses and host names?
• DNS
• DHCP
• SNMP
• NAT

Correct Answer A
QUESTION 33
Which Cisco platform provides organization-wide
automation, security, policy enforcement, any
agility across wired and wireless networks?
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1. Cisco ACI
2. Cisco DNA Center
3. Cisco Umbrella
4. Cisco SD-WAN

Correct Answer B
QUESTION 34
Which HTTP error code series relates to
redirection? A. 400 B. 500 C. 200 D. 300
Correct Answer D
Explanation/Reference 1xx - Informational The
server has received the request and is continuing
the process 2xx - Successful The request was
successful and the browser has received the
expected information 3xx (Redirection) You have
been redirected and the completion of the request
requires further action 4xx (Client Error) The
website or the page could not be reached, either
the page is unavailable or the request contains
bad syntax 5xx (Server Error) While the request
appears to be valid, the server could not
complete the request
QUESTION 35

• A developer completed the creation of a script
  using Git. Before delivering it to the customer,
  the developer wants to be sure about all
  untracked files, without losing any information.
  Which command gathers this information?
• git clean --n
• git rm --f
• git clean --r
• git rm

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Correct Answer A
QUESTION 36
Fill in the blanks to complete the python script
to request a service ticket using the APIC-EM
rest API for the user ''devnetuser''.
Correct Answer Explanation Solution as below
QUESTION 37

• Which API is used to obtain data voicemail ports?
• Finesse gadgets
• Cisco Unified Communications manager
• Webex devices
• Webex teams

Correct Answer B
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Explanation/Reference Cisco Unified
Communications Manager (CUCM) provides API access
to data management, call management, and
voicemail integration. Source Cisco DevNet
Fundamental Course https//developer.cisco.com/c
ertification/fundamentals/
QUESTION 38
Drag and drop the code from the bottom onto the
box where the code is missing in the Bash script
to complete the missing assignment.
Correct Answer
QUESTION 39
Drag and drop the network automation interfaces
from the left onto the transport protocols that
they support on the right. Not all options are
used.
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Correct Answer
QUESTION 40

• Which IP service is used to monitor the
  performance of network devices?
• SNMP
• DHCP
• DNS
• NTP

Correct Answer A
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