Practice Questions 2

You use Azure AI Language to perform sentiment analysis on a sentence. The confidence scores .04 positive, .36 neutral, and .6 negative are returned. What do these confidence scores indicate about the sentence sentiment?

The document in negative

You have published your conversational 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

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 Azure AI Face to detect human faces in an image. How does the service indicate the location of the face 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

What does automated machine learning in Azure Machine Learning enable you to do?

Automatically run multiple training jobs using different algorithms and parameters to find the best model

You're 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?

Azure AI Speech

You plan to build an application that uses Azure AI Speech to transcribe audio recordings of phone calls into text, and then submits the transcribed text to Azure AI Language 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?

Azure AI 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?

Azure AI services

You want to use the Azure AI Vision service to analyze images. You also want to use the Azure AI Language 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?

Azure AI services

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

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

You are designing an AI application that uses images to detect cracks in a car windshields and warn drivers when a windshield should be repaired or replaced. What AI workload is described?

Computer Vision

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 Azure AI Custom Vision to train an image classification model. You want to create a resource that can only be used for model training, and not for prediction. What kind of resources should you create in your Azure subscription?

Custom Vision

What is meant by seasonal data?

Data occurring at regular intervals.

You are authoring a conversational 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 you should you do?

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

In Azure Machine Learning studio, what can you use to author regression machine learning pipelines using a drag-and-drop interface?

Designer

What is one aspect that may impair facial detection?

Extreme angles

You plan to use Azure AI Document Intelligence's prebuilt receipt model. Which kind of Azure resource should you create?

Form Recognizer or Azure AI services resource

Your organization has an existing frequently asked questions (FAQ) document. You need to create a 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.

A predictive app provides audio output for visually impaired users. Which principle of Responsible AI is reflected here?

Inclusiveness

How does Azure AI Anomaly Detector evaluate real-time data for anomalies?

It evaluates the current value against the previous value

What is the purpose of specifying granularity in your JSON data object?

It is used to indicate the recording pattern of the data

You want to use Azure AI Language 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 conversational language understanding application. What kind of resource should you create?

Language

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

Make a single class 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. You use 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. You also want the transformation to scale 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 Azure AI Vision service to identify the location of individual items in an image. Which of the following features should you retrieve?

Objects

You need to evaluate a classification model. Which metric can you use?

Precision

You want to create a knowledge base for bots. What capability would you use?

Question Answering

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

You want to create a model to predict the cost of heating an office building based on its size in square feet and the number of employees working there. What kind of machine learning problem is this?

Regression

You plan to use Azure AI Computer Vision's Read API. What results can the Read API provide?

Results arranged in pages, lines, and words

You want to use the Azure AI 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.

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're using Azure Machine Learning designer to create a training pipeline for a binary classification model. You've 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 wasn't used for training. What's another module should you add? - Join data - Split data - Select columns in dataset

Split data

Why do you split data into training and validation sets?

Splitting data into two sets enables you to train the model with the training set and test the model on unseen data from the test set

You want to use Azure AI 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

In deep learning, what is the purpose of a loss function?

To evaluate the aggregate difference between predicted and actual label values

When might you see NaN returned for a score in language detection?

When the language is ambiguous