Cisco Cisco Certified DevNet Associate 200-901

Exam Topics

The applicants must develop their knowledge and mastery of the exam domains in advance. The following is the overview of the subject areas that are included in this certification test:

Software Design & Development: The first section measures the proficiency of the test takers in the following:

• Explanation of the advantages of arranging code into functions/methods, classes as well as modules
• Identification of the benefits of general design patterns (Observer and MVC)
• Explanation of the benefits of version control
• Comparison of application development methods (waterfall, lean, and agile)
• Description of parsing of general data format to Python data structures
• Comparison of data formats
• Utilization of general version control operations with Git

Reference: https://www.cisco.com/c/en/us/training-events/training-certifications/exams/current-list/devasc-200-901.html?wcmmode=disabled

Infrastructure & Automation: As for this domain, the professionals are required to demonstrate their competence and expertise in the following:

• Description of the usage and roles of network simulation as well as test tools
• Description of the principles of infrastructure as code
• Description of the constituents and advantages of CI/CD pipeline for infrastructure automation
• Interpretation of the outcomes of a NETCONF or RESTCONF query
• Identification of the workflow being automated by a Python script, which utilizes Cisco APIs
• Description of the benefit of model driven programmability for the automation of infrastructure
• Interpretation of sequence diagram, which includes API calls
• Description of the principles as well as advantages of a code review process
• Comparison controller-level with device-level management
• Description of the possibilities of automation tools, such as Chef, Puppet, Cisco NSO, and Ansible

Preparation Phase

Cisco recommends that the specialists sitting for the 200-901 DEVASC test go through the Developing Applications and Automating Workflows using Cisco Core Platforms training course. It is designed to equip them with the skills required to implement the fundamental network applications with Cisco platforms as the base. It also focuses on teaching the examinees how to implement different automation workflows across collaboration, security, network, and computing infrastructure. The learners will gain experience in solving practical problems with the use of Cisco APIs and modern development tools. In addition, the students can find other resources on the Cisco site as well as other reputable websites.

What Are the Domains Covered by DEVASC Exam?

As this is a DevOps certification, the whole course as well as 200-901 test itself are centered around the development and design of the software. The following are the objectives and the topics on which one will be tested during the exam.

• Developing and designing software.
This domain focuses on one's knowledge in proper comparison of data formats such as XML, JSON, etc.; comparison of different methods available for software development such as agile, waterfall, and lean; explaining the pros of following coding best practices such as organizing your code into classes and functions; evaluating the advantages of using design patterns in your programming, including Observer and MVC; analyzing benefits of version control; and the common usage mechanisms in Git such as cloning, committing and branching. This section is accountable for 15% of the total questions in the exam.
• Infrastructure and automation.
The fourth section assesses one's knowledge of the components and advantages of CI/CD pipelines; the abilities of automation tools such as Chef and Ansible; the advantages of code reviewing processes, and skills in identifying the value that model driven programmability brings into infrastructure automation. Also, the understanding of the pros of network simulations, basic YANG models, and sequence diagrams is needed to answer the related questions. The weightage for this domain is 20%.
• Deploying applications and securing them.
One of the most important sections of the course content, the deployment and securing of applications has 15% of the test's syllabus. It discusses topics such as pros of edge computing; writing unit tests in Python; explaining a Dockerfile's contents; using Docker images within local developer environments; recognizing issues in application security; explaining the top OWASP threats, analyzing various application deployment models to define their attributes, using Bash commands, etc.
• Cisco technologies and utilizing them in development.
The third of 200-901 exam domains requires one to learn more about Cisco platforms and how to use them for development. It focuses on the following topics: writing Python scripts to use a Cisco SDK; coding to get a list of network devices using Cisco DNA Centre, Cisco SD-WAN, etc.; proper applying of concepts for model driven programmability within a Cisco environment; recognizing the best fitting DevNet resource according to a given scenario, and explaining the abilities of Cisco's platforms and APIs. These are only some of the concepts covered under this section that carries 15% of the exam's questions.
• Proper understanding of APIs and their usage.
Carrying a weightage of 20% of the final test, this section of DEVASC discusses how to properly understand and use APIs. The topic areas include recognizing the limitations of using APIs; creating REST API requests; identifying REST API related common HTTP response codes; recognizing the many parts of an HTTP response such as the header, body and response code; writing Python scripts to call a REST API; understanding differences between diverse API styles, and troubleshooting issues using API documentation and HTTP response code.
• Fundamentals of networking.
And finally, the fundamentals of networking are involved in 200-901 outline. This part focuses on the basics of computer networking such as the usage of VLANs and MAC addresses; functions of routers, switches, firewalls, etc.; ability to explain the functionalities of IP services such as DHCP, SNMP, DNS, and NAT; skills to find what causes connectivity issues of apps, and more. This section also accounts for 15% of the overall content.

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