AI-900: Full Practice Exam 3

Question 1

You have trained an image classification model in Custom Vision, but its accuracy is low. You want to improve it. What is the most effective action?

Accepted Answer

Add more varied images (lighting, angles, backgrounds) to the existing classes and retrain.

Answer

Increase the number of tags.

Answer

Change the project name.

Answer

Export the model to TensorFlow.

Question 2

A company wants to integrate an inclusive reading tool into its educational app to help students with dyslexia. The tool must read text aloud, highlight words, and break down syllables. Which Azure service do you use?

Accepted Answer

Azure Immersive Reader

Answer

Azure AI Vision

Answer

Azure AI Translator

Answer

Azure AI Speech

Question 3

You are designing a solution to extract data from tax forms specific to your country that do not follow a standard international format. Pre-built models don't work well. What should you do in Azure AI Document Intelligence?

Accepted Answer

Train a Custom Model by uploading at least 5 examples of your forms.

Answer

Use the 'Read' (OCR) model.

Answer

Use the 'Invoice' model.

Answer

Use Azure AI Vision.

Question 4

Which Azure AI service allows prioritizing content shown to a user (like news articles or suggested products) based on their real-time behavior (Reinforcement Learning)?

Accepted Answer

Azure AI Personalizer

Answer

Azure AI Recommendation

Answer

Azure Machine Learning Designer

Answer

Azure AI Search

Question 5

In Azure Machine Learning, what is the difference between a 'Datastore' and a 'Dataset'?

Accepted Answer

The Datastore is the reference to the storage connection (e.g., Blob) and the Dataset is a reference to specific data (e.g., a CSV file) within that store.

Answer

They are the same.

Answer

The Dataset stores passwords and the Datastore stores files.

Answer

The Datastore is for structured data and the Dataset for unstructured.

Question 6

Your chatbot must be able to understand if a user says 'Hello', 'Good morning', or 'Hey' and map all these to the same 'Greeting' intent. What CLU (Conversational Language Understanding) concept allows this?

Accepted Answer

Utterances

Answer

Entities

Answer

Pre-built domains

Answer

Translation

Question 7

You are using an Azure AI Speech container on a local device (Edge). What happens if the container loses internet connection for more than 12 hours?

Accepted Answer

It stops working until the connection is restored to send billing data.

Answer

It continues working indefinitely.

Answer

Data is deleted.

Answer

It sends an alert but continues working.

Question 8

Which Azure AI service would you use to identify if a person in a photo is a celebrity or a famous character?

Accepted Answer

Azure AI Vision (Domain-specific models)

Answer

Azure AI Face

Answer

Azure AI Custom Vision

Answer

Azure AI Search

Question 9

Which metric would you use to evaluate a binary classification model when the classes are highly imbalanced (e.g., 99% normal transactions, 1% fraud)?

Accepted Answer

Recall (Sensitivity) and F1 Score

Answer

Accuracy

Answer

R2 Score

Answer

MAE (Mean Absolute Error)

Question 10

You want your augmented reality app to identify furniture in a room. Which Azure service is best for detecting and locating common objects?

Accepted Answer

Azure AI Vision (Object Detection)

Answer

Azure AI Face

Answer

Azure AI Custom Vision

Answer

Azure AI Language

AI-900: Full Practice Exam 3

You have trained an image classification model in Custom Vision, but its accuracy is low. You want to improve it. What is the most effective action?

Explanation

Computer Vision - Improvement

Official Documentation