AI-900 中文 無料問題集「Microsoft Azure AI Fundamentals (AI-900中文版)」

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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

Explanation:

According to Microsoft's Responsible AI principles, one of the six core principles is fairness, which ensures that AI systems treat all individuals equitably and that their outcomes are not influenced by biases present in the training data or algorithms. The official Microsoft Learn module "Identify the guiding principles for responsible AI" clearly defines fairness as the requirement that AI systems should not amplify or perpetuate existing societal biases.
In this scenario, the statement emphasizes that AI systems should NOT reflect biases from the datasets used to train them, which directly aligns with the fairness principle. Bias in AI models can arise when the data used for training is unbalanced or not representative of the real-world population. For instance, if a facial recognition model is trained mostly on images of one demographic group, it may perform poorly on others- an example of unfair bias. Microsoft advocates building and testing AI systems with diverse, high-quality datasets to ensure fair performance across all groups.
The other principles listed-accountability, inclusiveness, and transparency-are also important but do not directly address bias mitigation:
* Accountability ensures that people remain responsible for AI systems and their decisions.
* Inclusiveness promotes accessibility and usability for all people, including those with disabilities.
* Transparency focuses on explaining how AI systems make decisions.
However, Fairness explicitly deals with avoiding discrimination and bias in AI outcomes and training data.
Thus, in Microsoft's Responsible AI framework, ensuring that systems do not reflect biases from datasets is part of the Fairness principle, which promotes equitable and unbiased treatment for all individuals in AI- driven decisions.

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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.

Explanation:

According to the Microsoft Azure AI Fundamentals (AI-900) official study guide and Microsoft Learn module "Describe core concepts of machine learning on Azure", the Azure Machine Learning Designer is a drag-and-drop, no-code/low-code interface that allows users to build, test, and deploy machine learning models visually without needing to write extensive code.
* Drag-and-Drop Visual Canvas # YESThe Azure Machine Learning Designer indeed provides a graphical interface where users can connect prebuilt modules for data preprocessing, training, evaluation, and deployment. Microsoft documentation describes it as a "drag-and-drop visual environment that simplifies machine learning model creation." This allows beginners and business users to construct machine learning pipelines intuitively, confirming this statement as True.
* Save Progress as a Pipeline Draft # YESThe designer lets users save their current work as a pipeline draft, enabling them to pause and return later. Microsoft Learn explicitly states that you can "save and publish pipeline drafts before running or deploying them." This functionality ensures workflow continuity, collaboration, and version management-making this statement also True.
* Include Custom JavaScript Functions # NOThe Azure Machine Learning Designer allows the integration of Python scripts through the "Execute Python Script" module for custom logic, but it does not support JavaScript. Custom code in the designer environment is limited to Python, as the platform is built for data science and machine learning tasks typically handled in Python-based environments.
Therefore, this statement is False.

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Explanation:

According to the Microsoft Azure AI Fundamentals (AI-900) study material and Azure OpenAI Service documentation, large language models (LLMs) such as GPT are capable of performing multiple natural language processing (NLP) tasks depending on the intent of the prompt. These tasks generally fall into categories like classification, generation, summarization, and translation, each with a distinct purpose and output type.
* Classifying - This process involves analyzing text and assigning it to a predefined category or label based on its content. The scenario "Detect the genre of a work of fiction" clearly fits this category. The model must evaluate the text and determine whether it belongs to genres like mystery, romance, or science fiction. This is a classic text classification problem, as the output is a discrete category derived from textual features.
* Summarizing - This process means condensing lengthy text into a shorter version that preserves the key information. In the scenario "Create a list of bullet points based on text input," the model extracts essential information and reformats it as concise bullet points, which is an abstraction form of summarization. Summarization models help users quickly understand the main ideas from long documents, meeting efficiency and readability goals.
* Generating - This refers to the LLM's ability to produce new, creative content based on input instructions. The task "Create advertising slogans from a product description" represents generation because it requires the model to construct original text that didn't previously exist. Generation tasks showcase the creativity and contextual fluency of models like GPT in marketing and content creation.
Thus, these mappings align directly with the Azure OpenAI LLM capabilities taught in AI-900, linking each NLP process with its most suitable real-world task.

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."

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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