Microsoft AI-900日本語 Value Pack (Frequently Bought Together)

Correct Answer:

Explanation:
< A webchat bot can interact with users visiting a website # Yes
Automatically generating captions for pre-recorded videos is an example of conversational AI # No A smart device in the home that responds to questions such as "What will the weather be like today?" is an example of conversational AI # Yes
\ These answers are based on the Microsoft Azure AI Fundamentals (AI-900) Official Study Guide and the Microsoft Learn module "Explore conversational AI in Microsoft Azure."
1. A webchat bot can interact with users visiting a website # Yes
This statement is true. A webchat bot is a key example of conversational AI, which allows users to communicate with an intelligent system through natural language. The Azure Bot Service supports a webchat channel, enabling website visitors to ask questions or get assistance directly through a chat interface embedded on a webpage. This allows businesses to provide 24/7 automated support and interactive engagement without human intervention.
2. Automatically generating captions for pre-recorded videos is an example of conversational AI # No This is incorrect because automatically generating captions involves speech-to-text transcription, which falls under speech recognition and not conversational AI. While it uses AI to convert audio into text, it does not involve interactive communication or natural language dialogue. This task would be handled by Azure AI's Speech service, not the conversational AI framework.
3. A smart device in the home that responds to questions such as "What will the weather be like today?" is an example of conversational AI # Yes This is true. Smart assistants like those found in home devices (e.g., voice-activated systems) use conversational AI technologies to process spoken language (using natural language processing and speech recognition) and generate appropriate responses. This interaction represents a classic example of conversational AI, as it allows human-like dialogue between a user and an AI system.
# Final Answers:
* Webchat bot interacting with users # Yes
* Auto-captioning videos # No
* Smart home device answering questions # Yes

Correct Answer:

Explanation:

According to the Microsoft Azure AI Fundamentals (AI-900) official study guide and the Microsoft Learn module "Identify features of common machine learning types", the three main machine learning model types differ by their purpose and the kind of data they use - whether supervised (using labeled data) or unsupervised (using unlabeled data).
* Regression # A supervised machine learning model used to predict numeric values.Regression is a type of supervised learning that predicts continuous numerical outcomes. It learns the relationship between input features (independent variables) and a continuous target variable (dependent variable). Examples include predicting house prices, sales revenue, or temperature. The AI-900 curriculum emphasizes regression for "predicting numeric values based on known data," using algorithms such as linear regression or decision tree regression.
* Classification # A supervised machine learning model used to predict categories.Classification is also a supervised learning technique, but it predicts discrete outcomes (classes) instead of continuous values.
It assigns input data to one or more categories based on learned patterns. Typical examples include spam detection (spam vs. not spam), sentiment analysis (positive, neutral, negative), or predicting loan approval (approved/denied). The AI-900 study materials describe classification as "predicting a category or label for new observations."
* Clustering # An unsupervised machine learning model used to group similar entities based on features.
Clustering is an unsupervised learning approach, meaning it works on unlabeled data. It automatically identifies patterns and groups similar data points into clusters based on shared characteristics. Examples include customer segmentation (grouping customers by behavior) and grouping similar documents. The AI-900 learning module explains clustering as "discovering natural groupings in data without predefined labels." Thus, per Microsoft's official AI-900 learning objectives:
* Regression # Predicts numeric/continuous values.
* Classification # Predicts categories/labels.
* Clustering # Groups similar entities (unsupervised).
# Final Verified Configuration:
* Regression # Predict numeric values
* Classification # Predict categories
* Clustering # Group similar entities based on features

Correct Answer:

Explanation:

According to the Microsoft Azure AI Fundamentals (AI-900) official study guide and Microsoft Learn documentation for Azure AI Custom Vision, this service is a specialized part of the Azure AI Vision family that enables developers to train custom image classification and object detection models. It allows organizations to build tailored computer vision models that recognize images or specific objects relevant to their business needs.
* Detect objects in an image # YesThe Azure AI Custom Vision service supports both image classification (assigning an image to one or more categories) and object detection (identifying and locating objects within an image using bounding boxes). This means it can indeed detect and differentiate multiple objects in a single image, making this statement true.
* Requires your own data to train the model # YesThe Custom Vision service is designed to be customizable. Unlike prebuilt Azure AI Vision models that work out of the box, Custom Vision requires you to upload and label your own dataset for training. The model then learns from your examples to perform specialized image recognition tasks relevant to your domain. Thus, this statement is also true.
* Analyze video files # NoWhile Custom Vision can analyze images, it does not directly process or analyze video files. Video analysis is handled by a different service-Azure Video Indexer-which can extract insights such as spoken words, scenes, and faces from videos.
In summary:
# Yes - Detect objects in images
# Yes - Requires your own data
# No - Does not analyze video files.

Correct Answer:

Explanation:
validation.
In the Microsoft Azure AI Fundamentals (AI-900) study materials, a key concept in machine learning model development is splitting data into subsets for training, validation, and testing. A randomly extracted subset of data from a dataset is most commonly used for validation - that is, for evaluating the performance of the model during or after training.
Here's how this process works:
* Training set - This portion of the dataset is used to train the machine learning model. The model learns patterns, relationships, and parameters from this data.
* Validation set - This is a randomly selected subset (separate from training data) used to fine-tune model hyperparameters and evaluate how well the model generalizes to unseen data. It helps detect overfitting
- when the model performs well on training data but poorly on new data.
* Test set - A final, untouched dataset used to measure the model's real-world performance after all training and tuning are complete.
By reserving a random subset for validation, data scientists ensure that the model's performance metrics reflect generalization, not memorization of the training data.
Let's review the incorrect options:
* Algorithms - These are the mathematical frameworks or methods used to build models (e.g., decision trees, neural networks). They are not data subsets.
* Features - These are input variables (attributes) used by the model, not randomly selected data subsets.
* Labels - These are target values or outcomes the model predicts; again, not data subsets.
Therefore, in alignment with Azure AI-900's machine learning fundamentals, the correct completion is:
# "A randomly extracted subset of data from a dataset is commonly used for validation of the model."

Correct Answer:

Explanation:

This question evaluates your understanding of how different Azure AI workloads correspond to specific tasks in image, text, and content generation scenarios, as explained in the Microsoft Azure AI Fundamentals (AI-
900) study guide and Microsoft Learn modules covering common AI workloads and Azure services.
* Generate a caption from a given image # Computer VisionThis is a computer vision task because it involves analyzing the visual elements of an image and producing descriptive text (a caption). Azure AI Vision provides image analysis and captioning capabilities through its Describe Image API, which uses deep learning models to recognize objects, scenes, and actions in an image and automatically generate natural-language descriptions (e.g., "A cat sitting on a sofa").
* Generate an image from a given caption # Generative AIThis task belongs to Generative AI, which focuses on creating new content such as text, code, or images based on prompts. Tools like Azure OpenAI Service with DALL-E can interpret text descriptions and generate realistic images that match the given caption. Generative AI is capable of creative synthesis, not just analysis, making it the appropriate category.
* Generate a 200-word summary from a 2,000-word article # Text AnalyticsText analytics (a subset of natural language processing) allows summarization, sentiment analysis, and entity recognition from large text corpora. Azure AI Language includes text summarization capabilities that condense long documents into concise summaries while preserving meaning and key information.