Microsoft AI-900 Actual Free Exam Questions & Community Discussion

Explanation:
Features
According to the Microsoft Azure AI Fundamentals (AI-900) official study guide and the Microsoft Learn module "Explore fundamental principles of machine learning," data values that influence the prediction of a model are called features. In the context of machine learning, a feature is an individual measurable property, attribute, or input variable used by the model to make predictions.
Features are the independent variables that describe the characteristics of the data. For example, in a housing price prediction model, features might include square footage, location, number of bedrooms, and year built.
These inputs help the model understand relationships in the data so it can predict the target outcome (the house price).
Microsoft Learn explains that features are the input variables that the algorithm uses to identify patterns and relationships in the training data. During training, the model learns how changes in these features influence the label (also known as the dependent variable or target variable). The label is the value the model tries to predict-such as "price," "category," or "yes/no." Here's how the other options differ:
* Dependent variables (labels): These are the outcomes or target values the model predicts, not the inputs.
* Identifiers: These are unique keys (like customer ID or transaction ID) used to distinguish records but not to influence predictions.
* Labels: As mentioned, labels are the results the model tries to predict.
Therefore, based on the AI-900 learning objectives and Microsoft's official explanation, the data values that influence the prediction of a model-that is, the input variables that guide the model's learning-are called features. These features form the foundation of the model's predictive capabilities and directly impact its accuracy and performance.

Explanation:
Statements
Yes
No
A bot that responds to queries by internal users is an example of a conversational AI workload.
# Yes
An application that displays images relating to an entered search term is an example of a conversational AI workload.
# No
A web form used to submit a request to reset a password is an example of a conversational AI workload.
# No
According to the Microsoft Azure AI Fundamentals (AI-900) official study materials, conversational AI workloads are those that enable interaction between humans and AI systems through natural language conversation, either by text or speech. These workloads are typically implemented using Azure Bot Service, Azure Cognitive Services for Language, and Azure OpenAI Service. The key characteristic of a conversational AI workload is the presence of dialogue-the AI interprets user intent and provides a meaningful, contextual response in a conversation-like manner.
* "A bot that responds to queries by internal users is an example of a conversational AI workload." # YESThis fits the definition perfectly. A chatbot that helps employees (internal users) by answering questions about policies, IT issues, or HR procedures is a typical example of conversational AI. It uses natural language understanding to interpret questions and provide automated responses. Microsoft Learn explicitly identifies chatbots as conversational AI solutions designed for both internal and external interactions.
* "An application that displays images relating to an entered search term is an example of a conversational AI workload." # NOThis is not conversational AI because there is no dialogue or language understanding involved. It is an example of information retrieval or computer vision if it uses image recognition, but not conversation.
* "A web form used to submit a request to reset a password is an example of a conversational AI workload." # NOA password reset form is a simple UI-driven process that doesn't require AI or conversational logic. It performs a fixed function based on user input but does not understand or respond to natural language.
Therefore, based on the AI-900 study guide, only the first statement is an example of a conversational AI workload, while the second and third statements are not.

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Explanation:

According to the Microsoft Azure AI Fundamentals (AI-900) official study guide and Microsoft Learn module "Identify features of Computer Vision workloads on Azure", the Custom Vision service is a part of Azure Cognitive Services that allows users to build, train, and deploy custom image classification and object detection models. It is primarily designed for still-image analysis, not video processing.
* "The Custom Vision service can be used to detect objects in an image." - Yes.This is correct. The Custom Vision service supports two major model types: classification (categorizing entire images) and object detection (identifying and locating multiple objects within a single image). In object detection mode, the model outputs both the object's category and its position in the image using bounding boxes.
This capability is emphasized in the AI-900 curriculum as an example of applying computer vision to real-world scenarios, such as identifying products on shelves or detecting equipment parts in manufacturing.
* "The Custom Vision service requires that you provide your own data to train the model." - Yes.This statement is also true. Unlike prebuilt computer vision models, Custom Vision is a trainable model that requires users to upload their own labeled images to create a domain-specific AI model. The model's accuracy depends on the quality and quantity of this user-provided data. The AI-900 study materials explain that Custom Vision is used when prebuilt models do not meet specific needs, enabling businesses to train models tailored to unique image sets.
* "The Custom Vision service can be used to analyze video files." - No.This is incorrect. Custom Vision is limited to image-based analysis. To analyze video content (detecting objects or motion in moving frames), Azure provides Video Indexer, which is a separate service designed for extracting insights from video files, including speech, objects, faces, and emotions.

Explanation:
Text extraction.
According to the Microsoft Azure AI Fundamentals (AI-900) study guide and Microsoft Learn documentation for Azure AI Vision (formerly Computer Vision), text extraction-also known as Optical Character Recognition (OCR)-is the computer vision capability that detects and extracts printed or handwritten text from images and video frames.
In this scenario, a traffic monitoring system collects vehicle registration numbers (license plates) from CCTV footage. These registration numbers are alphanumeric text that must be read and converted into digital form for processing, storage, or analysis. The Azure AI Vision service's OCR (text extraction) feature performs this function. It analyzes each frame from the video feed, detects text regions (the license plates), and converts the visual text into machine-readable text data.
This process is widely used in Automatic Number Plate Recognition (ANPR) systems that support law enforcement, toll booths, and parking management solutions. The OCR model can handle variations in font, lighting, and angle to accurately extract license plate numbers.
The other options describe different vision capabilities:
* Image classification assigns an image to a general category (e.g., "car," "truck," or "bike"), not text extraction.
* Object detection identifies and locates objects in images using bounding boxes (e.g., detecting the car itself), but not the text written on the car.
* Spatial analysis tracks people or objects in a defined physical space (e.g., counting individuals entering a building), not reading text.
Therefore, for a traffic monitoring system that identifies vehicle registration numbers from CCTV footage, the most accurate Azure AI Vision capability is Text extraction (OCR).

Explanation:

In the Microsoft Azure AI Fundamentals (AI-900) curriculum, computer vision workloads are grouped into distinct types, each serving a specific purpose. The three major workloads illustrated here are image classification, object detection, and optical character recognition (OCR). Understanding their use cases is essential for correctly mapping them to real-world scenarios.
* Generate captions for images # Image classificationThe image classification workload is used to identify the main subject or context of an image and assign descriptive labels. In Microsoft Learn's
"Describe features of computer vision workloads," image classification models are trained to recognize content (e.g., a cat, a beach, or a city). Caption generation expands on classification results by describing the image's contents in human-readable language-based on what the model identifies as key visual features.
* Extract movie title names from movie poster images # Optical character recognition (OCR)OCR is a vision workload that detects and extracts text from images. Azure AI Vision's Read API or Document Intelligence OCR models can identify printed or handwritten text within posters, signs, or documents.
In this case, the movie title text from a poster is best extracted using OCR.
* Locate vehicles in images # Object detectionThe object detection workload identifies multiple objects within an image and provides their locations using bounding boxes. It's ideal for tasks like counting cars in a parking lot or tracking objects in traffic images.

Explanation:

Box1: Sentiment analysis
Sentiment Analysis is the process of determining whether a piece of writing is positive, negative or neutral.
Box 2: Broad entity extraction
Broad entity extraction: Identify important concepts in text, including key Key phrase extraction/ Broad entity extraction: Identify important concepts in text, including key phrases and named entities such as people, places, and organizations.
Box 3: Entity Recognition
Named Entity Recognition: Identify and categorize entities in your text as people, places, organizations, date
/time, quantities, percentages, currencies, and more. Well-known entities are also recognized and linked to more information on the web.
Reference:
https://docs.microsoft.com/en-us/azure/architecture/data-guide/technology-choices/natural-language-processing
https://azure.microsoft.com/en-us/services/cognitive-services/text-analytics

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Explanation:
Features
The correct completion of the sentence is:
"In a machine learning model, the data that is used as inputs are called features." According to the Microsoft Azure AI Fundamentals (AI-900) official study materials and Microsoft Learn module "Identify features of common machine learning types," the term feature refers to an individual measurable property or characteristic of the data that is used by a machine learning model to make predictions or decisions.
In supervised and unsupervised learning, features serve as the inputs to the model. They are the variables that represent the information the algorithm learns from. For example, if a model predicts the price of a house, the features might include square footage, number of bedrooms, location, and age of the property. These features feed into the model so that it can learn the relationship between inputs and outputs.
Microsoft Learn further defines these key concepts:
* Features: Input variables (independent variables) used by the model to learn patterns.
* Labels: The desired output or target variable that the model is trained to predict (e.g., price, category).
* Instances: Individual rows or data records within the dataset (each instance has multiple features).
* Functions: Algorithms or mathematical operations used during training and prediction - not data inputs.
Therefore, among the provided options - features, functions, labels, instances - only features accurately describe the data elements used as inputs for training or inference in a machine learning model.
In summary, within the AI-900 learning context:
* Features = inputs to the model.
* Labels = outputs for supervised learning.
* Instances = examples (rows) of data.

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