AB-620 Practice Test

Sample AB-620 Practice Questions

10 real questions from the free AB-620bank. Pick an answer in your head, then open “Show answer” for the explanation.

1. 1. A center of excellence is designing a reuse strategy for a standalone computer use tool that automates a legacy claims system, intending several agent flows across different agents to invoke it. A maker updates the standalone tool's instructions to fix a bug. What is the correct expectation about how existing agents and agent flows that already added a local copy of this tool are affected?

   • A. Adding a standalone computer use tool to an agent creates an independent local copy; updates to the tool don't propagate to that copy, so each agent needs a separate update, while agent flows use the latest published version
   • B. Each agent and flow automatically reflects the updated instructions immediately, since standalone tools are referenced live
   • C. Agent flows alone reflect updates automatically; agents keep the original, unchanged copy permanently with no way to update it
   • D. Standalone computer use tools cannot be reused across more than one agent or flow, so this reuse strategy is not possible
   Show answer

   Correct answer: A

   Microsoft documents that adding a standalone computer use tool to an agent creates an independent embedded copy, and updates to the standalone tool do not propagate to that copy (or vice versa), so a reuse strategy must plan for updating each agent's local copy separately. Agent flows behave differently: they can only access published standalone computer use tools and always trigger the latest published version. Neither "every consumer updates automatically" nor "reuse across multiple agents is impossible" matches the documented behavior.

2. 2. An agent is being designed for external customers on a public marketing site, with no requirement for Microsoft sign-in. Which authentication option best matches this audience?

   • A. Require the Microsoft Copilot Studio connector for each chat session
   • B. Authenticate with Microsoft
   • C. Authenticate manually with Entra ID V2 and federated credentials
   • D. No authentication
   Show answer

   Correct answer: D

   For an external, anonymous public-site audience with no sign-in requirement, "No authentication" is the appropriate design choice, since it lets anyone with the link chat without a Microsoft account, matching a public marketing scenario. "Authenticate with Microsoft" and manual Entra ID options both require the visitor to sign in, and requiring the Copilot Studio connector for every session is an internal Power Automate integration concern, not an audience-facing authentication choice.

3. 3. A planning team wants generative answers to strictly avoid presenting information that cannot be traced back to a specific retrieved source, and also needs to know whether this default protection holds the same way regardless of which knowledge source authentication model is in play, including sources with no per-user sign-in requirement at all. Which characterization matches Microsoft's documented default behavior?

   • A. Grounding and citation validation are applied by default to every generated response regardless of the knowledge source's authentication model; only "Allow ungrounded responses" loosens that restriction
   • B. Grounding is enforced by default specifically for sources using Microsoft Entra ID delegated authentication, such as SharePoint; unauthenticated sources like Azure AI Search bypass citation validation entirely
   • C. Grounding applies by default when public website sources grounded with Bing are configured, but Dataverse-backed sources are ungrounded unless separately enabled
   • D. "Allow ungrounded responses" must be turned on before any grounding validation runs; without it, no citations are produced by default for any source
   Show answer

   Correct answer: A

   Grounding and citation validation are a property of Copilot Studio's summarization and safety-validation pipeline stages, applied to the generated response itself after retrieval, independent of which knowledge source fed that retrieval or whether that source used delegated per-user authentication. A source's authentication model (such as Azure AI Search's non-delegated, unauthenticated connection) governs what data can be retrieved and by whom, not whether the response pipeline validates grounding, so B and C incorrectly tie grounding to source authentication or source type. D reverses the actual default: grounding and citations are already on, and "Allow ungrounded responses" is the setting that loosens them, not a switch required to turn them on.

4. 4. A developer is integrating a Copilot Studio agent into an existing native mobile application and wants to reference the Copilot Studio client library rather than embed a prebuilt web widget. Which integration approach should the developer plan to use?

   • A. The Web Chat Embed iFrame code from the Channels page
   • B. The Microsoft 365 Agents SDK client library, using the agent's environment ID, schema name, tenant ID, and app registration details
   • C. A Power Automate cloud flow using the Execute Agent and wait action
   • D. A standalone computer use tool configured for the mobile app's UI
   Show answer

   Correct answer: B

   Integrating a Copilot Studio agent into an existing native app's code uses the Microsoft 365 Agents SDK client library, configured with the agent's Environment ID, Schema name, Tenant ID, and app registration details (or a connection string), and referenced directly from the app's codebase. The Web Chat Embed iFrame is for no-code embedding into an HTML page, a Power Automate flow calls an agent from a workflow rather than a native app UI, and computer use automates existing UI surfaces rather than serving as an app-integration channel.

5. 5. Which Power Platform admin center capability lets an admin block specific connectors from being used as agent tools across an environment?

   • A. Managed environment solution checker
   • B. Data policies (data loss prevention)
   • C. Power Platform pipelines
   • D. Environment variables
   Show answer

   Correct answer: B

   Data policies (the Power Platform data loss prevention feature) classify connectors into groups such as Business, Non-business, and Blocked, letting admins prevent makers from using specific connectors as tools or knowledge sources in Copilot Studio agents. The solution checker analyzes solution quality rather than blocking connectors, pipelines automate solution deployment between environments, and environment variables store configuration values, not connector restrictions.