AI-900 Microsoft Learn Knowledge Checks

You use the Text Analytics service to perform sentiment analysis on a document, and a score of 0.99 is returned. What does this score indicate about the document sentiment?

The document is positive

You have published your Language Understanding application. What information does a client application developer need to get predictions from it?

The endpoint and key for the application's prediction resource

You plan to use the Computer Vision service to read text in a large PDF document. Which API should you use?

The Read API

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?

50 MB

Which of the following results does an object detection model typically return for an image?

A class label, probability and bounding box for each object in the image

You plan to use Face to detect human faces in an image. How does the service indicate the location of the faces it detects?

A set of coordinates for each face, defining a rectangular bounding box around the face

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

You use 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 - 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 plan to build an application that uses the Speech service to transcribe audio recordings of phone calls into text, and then submits the transcribed text to the Text Analytics service to extract key phrases. You want to manage access and billing for the application services in a single Azure resource. Which type of Azure resource should you create?

Cognitive Services

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

You plan to use a set of images to train an object detection model, and then publish the model as a predictive service. You want to use a single Azure resource with the same key and endpoint for training and prediction. What kind of Azure resource should you create?

Cognitive services

You want to extract text from images and then use the Text Analytics service to analyze the 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

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

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

You plan to use the Form Recognizer pre-built receipt model. Which kind of Azure resource should you create?

Form recognizer or cognitive services resource

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

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 are authoring a Language Understanding application to support an international clock. You want users to be able to ask for the current time in a specified city, for example "What is the time in London?". What should you do?

Define a "city" entity and a "GetTime" intent with utterances that indicate the city intent.

What is one aspect that may impair facial detection?

Extreme angles

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

You want to use the Text Analytics service to determine the key talking points in a text document. Which feature of the service should you use?

Key phrase extraction

You need to provision an Azure resource that will be used to author a new Language Understanding application. What kind of resource should you create?

Language Understanding

You need to use the Translator Text service to translate email messages from Spanish into both English and French. What is the most efficient way to accomplish this goal?

Make a single call to the service; specifying a "from" language of "es", a "to" language of "en", and another "to" language of "fr".

You are creating a training pipeline for a regression model, using a dataset that has multiple numeric columns in which the values are on different scales. You want to transform the numeric columns so that the values are all on a similar scale based relative to the minimum and maximum values in each column. Which module should you add to the pipeline?

Normalize Data

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

(2) 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

Retrieve the categories for the image, specifying the landmarks domain

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

You want to use automated machine learning to train a regression model with the best possible R2 score. How should you configure the automated machine learning experiment?

Set the Primary metric to R2 score

You are developing an application that must take English input from a microphone and generate a real-time text-based transcription in Hindi. Which service should you use?

Speech

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

(2) You are creating a training pipeline for a regression model, using a dataset that has multiple numeric columns in which the values are on different scales. You want to transform the numeric columns so that the values are all on a similar scale based relative to the minimum and maximum values in each column. Which module should you add to the pipeline?

Splitting data into two sets enables you to compare the labels that the model predicts with the actual known labels in the original dataset

You want to use the Speech service to build an application that reads incoming email message subjects aloud. Which API should you use?

Text-to-speech

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

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

You want to use Face to identify named individuals. What must you do?

Use Face to create a group containing multiple images of each named individual, and train a model based on the group

When might you see NaN returned for a score in Language Detection?

When the language is ambiguous

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.

A bank wants to use historic loan repayment records to categorize loan applications as low-risk or high-risk based on characteristics like the loan amount, the income of the borrower, and the loan period. What kind of machine learning model should the bank use automated machine learning to create?

classification

An automobile dealership wants to use historic car sales data to train a machine learning model. The model should predict the price of a pre-owned car based on its make, model, engine size, and mileage. What kind of machine learning model should the dealership use automated machine learning to create?

regression