Explanation:
Description
Correct Service
Enables the use of natural language to query a knowledge base.
QnA Maker
Enables the real-time transcription of speech-to-text.
Speech
This question tests understanding of Azure Cognitive Services and their use cases as outlined in the Microsoft Azure AI Fundamentals (AI-900) study guide.
* "Enables the use of natural language to query a knowledge base." # QnA MakerAccording to Microsoft Learn's AI-900 module "Identify features of Natural Language Processing (NLP) workloads and services," QnA Maker is a cloud-based service that allows developers to build a question-and-answer layer over structured or unstructured content. It enables users to ask questions in natural language, and the service retrieves the most relevant answer from a knowledge base (such as FAQs, manuals, or documents).QnA Maker uses Natural Language Processing (NLP) techniques to interpret user intent and return an appropriate response. It is often integrated into chatbots built with Azure Bot Service to make them capable of conversational question-answering. In the newer Azure Cognitive Services lineup, QnA Maker capabilities are merged into Azure Cognitive Service for Language (Question Answering).
* "Enables the real-time transcription of speech-to-text." # SpeechThe Azure Speech service (part of Azure Cognitive Services) provides the ability to convert spoken language into written text in real time.
This feature, called Speech-to-Text, uses deep neural network models to recognize and transcribe human speech with high accuracy.Microsoft's AI-900 documentation specifies that Speech service capabilities also include text-to-speech, speech translation, and speaker recognition. Real-time transcription is widely used in applications such as voice assistants, captioning systems, call analytics, and accessibility tools.
Other listed services such as Azure Storage and Language Understanding (LUIS) serve different purposes:
* Azure Storage handles data storage, not AI workloads.
* LUIS identifies user intent from natural language but does not query knowledge bases directly.