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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.

• 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.
• 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%.
• 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.
• 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.
• 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.
• 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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Cisco 200-901 Exam: Content in Detail

The Cisco 200-901 exam covers a wide range of knowledge areas. These domains and their weight are enumerated below:

• Understanding and use of APIs – 20%

  This topic encompasses the following skills: constructing the REST API request to accomplish a task given API documentation; describing common usage patterns related to webhooks; identifying the constraints when consuming APIs; explaining common HTTP response codes associated with REST APIs; troubleshooting a problem given the HTTP response code, request and API documentation; identifying the parts of an HTTP response (response code, headers, body); utilizing common API authentication mechanisms; comparing common API styles (REST, RPC, synchronous, and asynchronous); constructing a Python script that calls REST API using the requests library.

• Infrastructure and automation concepts – 20%

  Within this area, the examinees need to demonstrate that they are capable of explaining the utilization and functions of the network test and simulation tools (including pyATS and VIRL); explaining the elements and advantages of the CICD pipeline in automating infrastructure; explaining infrastructure principles as code; explaining the automation tools capacity (Cisco NSO, Ansible, Chef, Puppet); defining the workflow that is automated with the help of a Python script with Cisco APIs, such as Cisco DNA Center, ACI, RESTCONF, or Meraki; defining the workflow that is automated with the help of an Ansible playbook (user management related to services, management packages, basic service configuration, start/stop); defining the workflow that is automated with the help of a bash script (including app install, directory navigation, file management, user management); interpreting the results of a RESTCONF or NETCONF query; interpreting general YANG models; explaining the principles and advantages of reviewing the code; interpreting the sequence diagram with API calls; interpreting a unified diff.

• Development of software – 15%

  This objective includes differentiating various data formats (YAML, XML, JSON); explaining parsing of general data format (YAML, XML, JSON) to Python data structures; describing the principles of test-driven development; differentiating methods of software development (waterfall, agile, lean); explaining the advantages of uniting code into functions, modules, and classes; defining the advantages of general design patterns (Observer and MVC); explaining the benefits of version control; utilizing general version control operations with Git.

• Cisco platforms – 15%

  This domain combines the questions that check the candidates’ ability to write a Python script incorporating Cisco SDK given SDK documentation; explain the capacity of Cisco APIs and network management platforms (Cisco DNA, Center, ACI, Meraki, NSO, Cisco SD-WAN); explain the capacity of Cisco APIs and compute management platforms (Intersight, UCS Director, UCS Manager); explain the capacity of Cisco APIs and collaboration platforms (Cisco Unified Communication Manager, Webex devices, Webex Teams, Finesse); explain the capacity of Cisco APIs and security platforms (Umbrella, Firepower, ISE, AMP, ThreatGrid); explain the device level dynamic interfaces and APIs for IOS XE and NX-OS; define the proper DevNet resource for a particular scenario (Code Exchange, Sandbox, Learning Labs, support, forums, API documentation); apply the principles of model driven programmability (NETCONF, YANG, RESTCONF) within a Cisco environment; build code to execute a particular operation on the basis of API reference documentation.

• Fundamentals of networks – 15%

  This topic area involves the following abilities: explaining the role and utilization of VLANs and MAC addresses; explaining the role and utilization of subnet prefix/mask, routes, IP addresses, and gateways; explaining the role of general networking elements (including firewalls, switches, routers, load balancers); interpreting a basic network topology diagram with the components, such as firewalls, switches, load balancers, routers, and port values; explaining the role of data, management, and control planes in a network device; explaining the functionality of IP services, such as DNS, DHCP, SNMP, NAT, NTP; recognizing general protocol port values (including HTTP, SSH, HTTPS, Telnet, NETCONF); identifying cause of application connectivity problems (VPN, proxy, NAT problem, Transport Port blocked); explaining the influence of network restraints on application.

• Deployment of applications and their security – 15%

  This subject covers the following competencies: explaining the advantages of edge computing; defining the attributes of various application deployment models (hybrid Cloud, private Cloud, public Cloud, edge); defining the attributes of the above-mentioned application deployment types; explaining the elements for the CICD pipeline within application deployments; designing a Python unit test interpreting contents of Dockerfile; utilizing Docker images in a local developer environment; defining application security problems associated with encryption, secret protection, data handling; explaining OWASP threats (including SQL injections, XSS, CSRF); applying Bash commands (directory navigation, environmental variables, file management); defining the DevOps practices principles.

Cisco 200-901 Exam Syllabus Topics:

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