AI-900 Learning Path Questions
You are using the Form Recognizer service to analyze receipts that you have scanned into JPG format images. What is the maximum file size of JPG file you can submit to the pre-built receipt model?
50MB
You train an image classification model that achieves less than satisfactory evaluation metrics. How might you improve it?
Add more images to the training set. Correct: Generally, adding more images to the project and retraining the model is likely to improve performance.
You used Azure Machine Learning designer to create a training pipeline for a clustering model. Now you want to use the model in an inference pipeline. Which module should you use to infer cluster predictions from the model?
Assign Data to Clusters (That is correct. use the Assign Data to Clusters module to generate cluster predictions from a trained clustering model)
You want to create a model to predict sales of ice cream based on historic data that includes daily ice cream sales totals and weather measurements. Which Azure service should you use?
Azure Machine Learning
You want to use the Computer Vision service to analyze images. You also want to use the Text Analytics service to analyze text. You want developers to require only one key and endpoint to access all of your services. What kind of resource should you create in your Azure subscription?
Cognitive Services Correct. A Cognitive Services resource support both Computer Vision and Text Analytics.
You need to deliver a support bot for internal use in your organization. Some users want to be able to submit questions to the bot using Microsoft Teams, others want to use a web chat interface on an internal web site. What should you do?
Create a knowledge base. Then create a bot for the knowledge base and connect the Web Chat and Microsoft Teams channels for your bot Correct. The Microsoft Teams channel enables your bot to receive and respond to messages in Microsoft Teams, and the Web Chat channel enables interactions through a web chat interface.
You use Azure Machine Learning designer to create a training pipeline for a classification model. What must you do before deploying the model as a service?
Create an inference pipeline from the training pipeline. (That is correct. You must create an inference pipeline to deploy as a service.)
You want to train a model that classifies images of dogs and cats based on a collection of your own digital photographs. Which Azure service should you use?
Custom Vision
You plan to use the Custom Vision service to train an image classification model. You want to create a resource that can only be used for model training, and not for prediction. Which kind of resource should you create in your Azure subscription?
Custom Vision Correct: When you create a Custom Vision resource, you can specify whether it is to be used for training, prediction, or both.
Your organization has an existing frequently asked questions (FAQ) document. You need to create a QnA Maker knowledge base that includes the questions and answers from the FAQ with the least possible effort. What should you do?
Import the existing FAQ document into a new knowledge base. Correct. You can import question and answer pairs from an existing FAQ document into a QnA Maker knowledge base.
You want to use the Computer Vision service to identify the location of individual items in an image. Which of the following features should you retrieve?
Objects Correct. Computer Vision returns objects with a bounding box to indicate their location in the image.
You want to use the Computer Vision service to analyze images of locations and identify well-known buildings. What should you do?
Retrieve the categories for the image, specifying the landmarks domain Correct. The landmarks domain includes many well-known buildings around the world.
You are using an Azure Machine Learning designer pipeline to train and test a K-Means clustering model. You want your model to assign items to one of three clusters. Which configuration property of the K-Means Clustering module should you set to accomplish this?
Set Number of Centroids to 3 (That is correct. To create K clusters, you must set the number of centroids to K)
You are using Azure Machine Learning designer to create a training pipeline for a binary classification model. You have added a dataset containing features and labels, a Two-Class Decision Forest module, and a Train Model module. You plan to use Score Model and Evaluate Model modules to test the trained model with a subset of the dataset that was not used for training. Which additional kind of module should you add?
Split data (That is correct. Use a Split Data module to randomly split a dataset into training and validation subsets.)
You use an Azure Machine Learning designer pipeline to train and test a binary classification model. You review the model's performance metrics in an Evaluate Model module, and note that it has an AUC score of 0.3. What can you conclude about the model?
The model performs worse than random guessing. (That is correct. An AUC of 0.5 is what you'd expect with random prediction of a binary model.)
You have published an image classification model. What information must you provide to developers who want to use it?
The project ID, the model name, and the key and endpoint for the prediction resource Correct: To use a published model, you need the project ID, the model name, and the key and endpoint for the prediction resource.
You are designing an AI application that uses computer vision to detect cracks in car windshields, and warns drivers when a windshield should be repaired or replaced. When tested in good lighting conditions, the application successfully detects 99% of dangerously damaged glass. Which of the following statements should you include in the application's user interface?
When used in good lighting conditions, this application can be used to identify potentially dangerous cracks and defects in windshields. If you suspect your windshield is damaged, even if the application does not detect any defects, you should have it inspected by a professional.