* To extend Video Indexer with industry-specific terms, you upload a plain text (TXT) file containing the vocabulary.
* PDF, XML, XLS are not supported for custom vocabulary upload.
The answer: C
Reference: Customize Video Indexer with custom vocabulary

In the Microsoft Bot Framework SDK, bots communicate using activities (messages, events, conversation updates, etc.).
To respond to events (like conversation started, member added, or custom event activities), you use an ActivityHandler.
The ActivityHandler class provides methods you can override, such as OnMessageActivityAsync , OnMembersAddedAsync , or custom event handlers, to send custom text responses.
Other options:
Adaptive card (A) # used for rich UI responses, not for handling events.
Dialog (C) # used for managing conversation flow, not event handling.
Skill (D) # used to integrate another bot's functionality, not for handling custom events.
Reference: ActivityHandler class in Bot Framework

* To present a list of options with images, you use Adaptive Cards, which allow for rich content such as images, buttons, and formatted text in the conversation.
* These cards are typically surfaced within the context of a dialog, which controls the flow of the conversation.
* Azure functions are unrelated here.
* Entities and utterances belong to natural language understanding, not UI presentation.
The answer: B and D
Reference: Adaptive Cards in Bot Framework Composer

Explanation:

To validate that your Azure AI Content Safety resource can identify images containing potential violence, you must call the Image Analyze operation of Content Safety. The REST endpoint for this operation is:
POST {endpoint}/contentsafety/image:analyze?api-version=2024-09-01
This operation analyzes an image for the four harm categories Hate, SelfHarm, Sexual, and Violence.
Therefore, the correct base path is /contentsafety, and the correct operation is image analyze (shown in the hotspot as /imageanalyze).
Microsoft References
REST API: Analyze Image - POST {endpoint}/contentsafety/image:analyze?api-version=2024-09-01 ; categories include Hate, SelfHarm, Sexual, and Violence. Microsoft Learn Quickstart: Analyze image content with Azure AI Content Safety (overview and examples). Microsoft Learn Harm categories concept (lists Violence among supported categories). Microsoft Learn