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Developing Applications using Cisco Core Platforms and APIs (DEVCOR) Exam Dumps

350-901 Exam Format | Course Contents | Course Outline | Exam Syllabus | Exam Objectives

350-901 DEVCOR

Certifications: Cisco Certified DevNet Professional, Cisco Certified DevNet Specialist - Core

Duration: 120 minutes

This exam tests your knowledge of software development and design, including:

- Using APIs

- Cisco platforms

- Application deployment and security

- Infrastructure and automation

Exam Description

The Developing Applications Using Cisco Core Platforms and APIs v1.0 (DEVCOR 350-901) exam is a 120-minute exam associated with the Cisco Certified DevNet Professional certification. This exam tests a candidate's knowledge of software development and design including using APIs, Cisco platforms, application deployment and security, and infrastructure and automation. The course, Developing Applications Using Cisco Core Platforms and APIs, helps candidates to prepare for this exam.

20% 1.0 Software Development and Design

1.1 Describe distributed applications related to the concepts of front-end, back-end, and load balancing
1.2 Evaluate an application design considering scalability and modularity
1.3 Evaluate an application design considering high-availability and resiliency (including onpremises, hybrid, and cloud)

1.4 Evaluate an application design considering latency and rate limiting

1.5 Evaluate an application design and implementation considering maintainability

1.6 Evaluate an application design and implementation considering observability

1.7 Diagnose problems with an application given logs related to an event

1.8 Evaluate choice of database types with respect to application requirements (such as relational, document, graph, columnar, and Time Series)

1.9 Explain architectural patterns (monolithic, services oriented, microservices, and event driven)

1.10 Utilize advanced version control operations with Git

1.10.a Merge a branch

1.10.b Resolve conflicts

1.10.c git reset

1.10.d git checkout

1.10.e git revert

1.11 Explain the concepts of release packaging and dependency management

1.12 Construct a sequence diagram that includes API calls

20% 2.0 Using APIs

2.1 Implement robust REST API error handling for time outs and rate limits

2.2 Implement control flow of consumer code for unrecoverable REST API errors

2.3 Identify ways to optimize API usage through HTTP cache controls

2.4 Construct an application that consumes a REST API that supports pagination

2.5 Describe the steps in the OAuth2 three-legged authorization code grant flow

20% 3.0 Cisco Platforms

3.1 Construct API requests to implement chatops with Webex Teams API

3.2 Construct API requests to create and delete objects using Firepower device management (FDM)

3.3 Construct API requests using the Meraki platform to accomplish these tasks

3.3.a Use Meraki Dashboard APIs to enable an SSID

3.3.b Use Meraki location APIs to retrieve location data

3.4 Construct API calls to retrieve data from Intersight

3.5 Construct a Python script using the UCS APIs to provision a new UCS server given a template

3.6 Construct a Python script using the Cisco DNA center APIs to retrieve and display wireless health information

3.7 Describe the capabilities of AppDynamics when instrumenting an application

3.8 Describe steps to build a custom dashboard to present data collected from Cisco APIs

20% 4.0 Application Deployment and Security

4.1 Diagnose a CI/CD pipeline failure (such as missing dependency, incompatible versions of components, and failed tests)

4.2 Integrate an application into a prebuilt CD environment leveraging Docker and Kubernetes

4.3 Describe the benefits of continuous testing and static code analysis in a CI pipeline

4.4 Utilize Docker to containerize an application

4.5 Describe the tenets of the "12-factor app"

4.6 Describe an effective logging strategy for an application

4.7 Explain data privacy concerns related to storage and transmission of data

4.8 Identify the secret storage approach relevant to a given scenario

4.9 Configure application specific SSL certificates

4.10 Implement mitigation strategies for OWASP threats (such as XSS, CSRF, and SQL injection)

4.11 Describe how end-to-end encryption principles apply to APIs

20% 5.0 Infrastructure and Automation

5.1 Explain considerations of model-driven telemetry (including data consumption and data storage)

5.2 Utilize RESTCONF to configure a network device including interfaces, static routes, and VLANs (IOS XE only)

5.3 Construct a workflow to configure network parameters with:

5.3.a Ansible playbook

5.3.b Puppet manifest

5.4 Identify a configuration management solution to achieve technical and business requirements

5.5 Describe how to host an application on a network device (including Catalyst 9000 and Cisco IOx-enabled devices)

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Cisco
350-901
Developing Applications using Cisco Core Platforms
and APIs (DEVCOR)
http://killexams.com/pass4sure/exam-detail/350-901
Question: 303
Which statement about microservices architecture is true?
A. Applications are written in a single unit.
B. It is a complex application composed of multiple independent parts.
C. It is often a challenge to scale individual parts.
D. A single faulty service can bring the whole application down.
Answer: B
Question: 304
Application sometimes store configuration as constants in the code, which is a violation of strict separation of
configuration from code.
Where should application configuration be stored?
A. environment variables
B. YAML files
C. Python libraries
D. Dockerfiles
E. INI files
Answer: B
Question: 305
Which two methods are API security best practices? (Choose two.)
A. Use tokens after the identity of a client has been established.
B. Use the same operating system throughout the infrastructure.
C. Use encryption and signatures to secure data.
D. Use basic auth credentials over all internal API interactions.
E. Use cloud hosting services to manage security configuration.
Answer: AC
Question: 306
DRAG DROP
Drag and drop the steps from the left into the correct sequence on the right to describe how to use Git to maintain the
current HEAD and revert back to a previous commit, while undoing all intermediate commits.
Answer:
Question: 307
Refer to the exhibit.
The cURL POST request creates an OAuth access token for authentication with FDM API requests.
What is the purpose of the file �@token_data� that cURL is handling?
A. This file is a container to log possible error responses in the request.
B. This file is given as input to store the access token received from FD
D. This file is used to send authentication related headers.
E. This file contains raw data that is needed for token authentication.
Answer: B
Question: 308
A user is receiving a 429 Too Many Requests error.
Which scheme is the server employing that causes this error?
A. rate limiting
B. time outs
C. caching
D. redirection
Answer: A
Question: 309
Which two situations are flagged by software tools designed for dependency checking in continuous integration
environments, such as OWASP? (Choose two.)
A. publicly disclosed vulnerabilities related to the included dependencies
B. mismatches in coding styles and conventions in the included dependencies
C. incompatible licenses in the included dependencies
D. test case failures introduced by bugs in the included dependencies
E. buffer overflows to occur as the result of a combination of the included dependencies
Answer: AE
Question: 310
Which two data encoding techniques are supported by gRPC? (Choose two.)
A. XML
B. JSON
C. ASCII
D. ProtoBuf
E. YAML
Answer: BE
Question: 311
An organization manages a large cloud-deployed application that employs a microservices architecture across multiple
data centers. Reports have received about application slowness. The container orchestration logs show that faults have
been raised in a variety of containers that caused them to fail and then spin up brand new instances.
Which two actions can improve the design of the application to identify the faults? (Choose two.)
A. Automatically pull out the container that fails the most over a time period.
B. Implement a tagging methodology that follows the application execution from service to service.
C. Add logging on exception and provide immediate notification.
D. Do a write to the datastore every time there is an application failure.
E. Implement an SNMP logging system with alerts in case a network link is slow.
Answer: BC
Question: 312
DRAG DROP
Drag and drop the git commands from the left into the correct order on the right to create a feature branch
from the master and then incorporate that feature branch into the master.
Answer:
Question: 313
DRAG DROP
Refer to the exhibit.
Drag and drop parts of the URL from the left onto the item numbers on the right that match the missing sections in the
exhibit to create the appropriate RESTCONF URL to query the VLAN configuration given this YANG model. Not all
URL parts are used.
Answer:
Question: 314
DRAG DROP
Drag and drop the expressions from below onto the code to implement error handling. Not all options are used.
Answer:
Question: 315
Refer to the exhibit.
The YAML represented is using the ios_vrf module.
As part of the Ansible playbook workflow, what is the result when this task is run?
A. VRFs not defined in the host_vars file are removed from the device.
B. VRFs not defined in the host_vars file are added to the device, and any other VRFs on the device remain.
C. VRFs defined in the host_vars file are removed from the device.
D. VRFs are added to the device from the host_vars file, and any other VRFs on the device are removed.
Answer: D
Question: 316
User report that they can no longer process transactions with the online ordering application, and the logging
dashboard is displaying these messages.
Fri Jan 10 19:37:31.123 EST 2020 [FRONTEND] INFO: Incoming request to add item to cart from user 45834534858
Fri Jan 10 19:37:31 247 EST 2020 [BACKEND] INFO: Attempting to add item to cart
Fri Jan 10 19:37:31 250 EST 2020 [BACKEND] ERROR: Failed to add item: MYSQLDB ERROR: Connection
refused
What is causing the problem seen in these log messages?
A. The database server container has crashed.
B. The backend process is overwhelmed with too many transactions.
C. The backend is not authorized to commit to the database.
D. The user is not authorized to add the item to their cart.
Answer: A
Question: 317
Refer to the exhibit.
What is the output of this IOS-XE configuration program?
A. interface operational status in IPv6 addresses
B. interface administrative status in IPv4 addresses
C. interface operational status in IPv4 addresses
D. interface administrative status in IPv6 addresses
Answer: D
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