AI-900: Microsoft Azure AI Fundamentals

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Question 1

A company employs a team of customer service agents to provide telephone and email support to customers.
The company develops a webchat bot to provide automated answers to common customer queries.

Which business benefit should the company expect as a result of creating the webchat bot solution?
increased sales
a reduced workload for the customer service agents
improved product reliability




Answer is a reduced workload for the customer service agents

Question 2

For a machine learning progress, how should you split data for training and evaluation?
Use features for training and labels for evaluation.
Randomly split the data into rows for training and rows for evaluation.
Use labels for training and features for evaluation.
Randomly split the data into columns for training and columns for evaluation.




Answer is Randomly split the data into rows for training and rows for evaluation.

The Split Data module is particularly useful when you need to separate data into training and testing sets. Use the Split Rows option if you want to divide the data into two parts. You can specify the percentage of data to put in each split, but by default, the data is divided 50-50. You can also randomize the selection of rows in each group, and use stratified sampling. Randomly 75-25 split on row may be a good idea.

Reference:
https://docs.microsoft.com/en-us/azure/machine-learning/studio-module-reference/split-data#how-to-configure-split-data

Question 3

You are developing a model to predict events by using classification.
You have a confusion matrix for the model scored on test data as shown in the following exhibit.


Select the answers choice that completes each statement based on the information presented in the graphic.
Check the answer section






TP = True Positive.
The class labels in the training set can take on only two possible values, which we usually refer to as positive or negative. The positive and negative instances that a classifier predicts correctly are called true positives (TP) and true negatives (TN), respectively. Similarly, the incorrectly classified instances are called false positives (FP) and false negatives (FN).
Box 2: 1,033
FN = False Negative

Reference:
https://docs.microsoft.com/en-us/azure/machine-learning/studio/evaluate-model-performance

Question 4

You build a machine learning model by using the automated machine learning user interface (UI).
You need to ensure that the model meets the Microsoft transparency principle for responsible AI.

What should you do?
Set Validation type to Auto.
Enable Explain best model.
Set Primary metric to accuracy.
Set Max concurrent iterations to 0.




Answer is Enable Explain best model.

MS AI responsibilities

• Fairness – Limit Biases
• Reliability ad Safely – ops, resist manipulating, use of regresses testing
• Privacy and security- secure data provide security controls
• Inclusiveness- AI available to everyone i.e., disabled ppl
• Transparency- fully aware of the limitations over AII in use
• Accountability- follow governments and frameworks meet legal and ethical standards

Most businesses run on trust and being able to open the ML "black box" helps build transparency and trust. In heavily regulated industries like healthcare and banking, it is critical to comply with regulations and best practices. One key aspect of this is understanding the relationship between input variables (features) and model output. Knowing both the magnitude and direction of the impact each feature (feature importance) has on the predicted value helps better understand and explain the model. With model explain ability, we enable you to understand feature importance as part of automated ML runs.

Reference:
https://azure.microsoft.com/en-us/blog/new-automated-machine-learning-capabilities-in-azure-machine-learning-service/

Question 5

For each of the following statements, select Yes if the statement is true. Otherwise, select No.

Check the answer section




Answer is N/Y/N (regression, anomaly, classification)



Reference:
https://learn.microsoft.com/en-us/azure/cognitive-services/anomaly-detector/overview



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