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350-901Updated 1d ago · Sep 4, 2026

Developing Applications using Cisco Core Platforms and APIs (DEVCOR)

603 questions across 1 topics, with suggested answers, explanations where available, and imported community discussion. The first 60 questions are free to preview.

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Question 1 · Infrastructure and Automation Open

An automated solution is required to configure VMs across numerous cloud-provider environments and connect those environments to an SD-WAN. The SD-WAN edge VM is available as an image in each relevant cloud and can receive an identity and all necessary configuration through cloud-init, without logging in to the VM after it is online. Which configuration-management and/or automation tooling is required for this solution?

Answer: D Terraform can provision infrastructure across multiple cloud providers through a common infrastructure-as-code workflow. It can pass cloud-init configuration to VMs at creation time through provider-supported instance data such as `user_data`, `custom_data`, or metadata, eliminating the need for direct VM network access or remote-login credentials. The image’s cloud-init support therefore makes Terraform sufficient. **Learn more:** [Perform post-apply operations using provisioners | Terraform](https://developer.hashicorp.com/terraform/language/post-apply-operations) · [Deploy federated multi-cloud Kubernetes clusters | Terraform](https://developer.hashicorp.com/terraform/tutorials/networking/multicloud-kubernetes)
Question 2 · Application Deployment and Security Open

Applications may sometimes keep configuration as code constants, violating the strict separation of configuration from code. Where should application configuration be stored?

Answer: A Application configuration should be stored in environment variables so deployment-specific settings remain separate from the application codebase.
Question 3 · Using APIs Open

A client uses a REST API to communicate with a server. Over HTTPS, it sends an HTTP request and receives an HTTP response containing the status code **503 Service Unavailable**. Which action is the appropriate response?

Answer: D A 503 Service Unavailable response means the server is temporarily unable to process the request. When present, the `Retry-After` header tells the client how long to wait before retrying.