Question 1

A company is using Amazon Polly to translate plaintext documents to speech for automated company announcements.However, company acronyms are being mispronounced in the current documents.How should a Machine Learning Specialist address this issue for future documents?

Options :

A : Use Amazon Lex to preprocess the text files for pronunciation.

B : Create an appropriate pronunciation lexicon.

C : Output speech marks to guide in pronunciation.

D : Convert current documents to SSML with pronunciation tags.

Answer: D

Question 2

A Data Scientist is training a multilayer perception (MLP) on a dataset with multiple classes.The target class of interest is unique compared to the other classes within the dataset, but it does not achieve an acceptable recall metric.The Data Scientist has already tried varying the number and size of the MLP's hidden layers, which has not significantly improved the results.A solution to improve recall must be implemented as quickly as possible.Which techniques should be used to meet these requirements?

Options :

A : Train an anomaly detection model instead of an MLP

B : Train an XGBoost model instead of an MLP

C : Gather more data using Amazon Mechanical Turk and then retrain

D : Add class weights to the MLP-s loss function and then retrain

Answer: B

Question 3

What is the primary purpose of clustering in machine learning?

Options :

A : Grouping similar items together

B : Identifying outliers

C : Predicting future trends

D : Ranking relevant items

Answer: A

Question 4

A machine learning specialist is developing a proof of concept for government users whose primary concern is security.The specialist is using Amazon SageMaker to train a convolutional neural network (CNN) model for a photo classifier application. The specialist wants to protect the data so that it cannot be accessed and transferred to a remote host by malicious code accidentally installed on the training container.Which action will provide the MOST secure protection?

Options :

A : Encrypt the weights of the CNN model.

B : Enable network isolation for training jobs.

C : Remove Amazon S3 access permissions from the SageMaker execution role.

D : Encrypt the training and validation dataset.

Answer: B

Question 5

How does Amazon Polly enhance customer engagement?

Options :

A : By converting text into lifelike speech.

B : By providing personalized product recommendations.

C : By facilitating voice interactions with Alexa devices.

D : By predicting customer demand metrics accurately.

Answer: A