Question 1

A Data Scientist is working on an application that performs sentiment analysis.The validation accuracy is poor, and the Data Scientist thinks that the cause may be a rich vocabulary and a low average frequency of words in the dataset.Which tool should be used to improve the validation accuracy?

Options :

A : Natural Language Toolkit (NLTK) stemming and stop word removal

B : Amazon Comprehend syntax analysis and entity detection

C : Amazon SageMaker BlazingText cbow mode

D : Scikit-learn term frequency-inverse document frequency (TF-IDF) vectorizer

Answer: D

Question 2

Which labeling approach will help the company improve this model?

Options :

A : Use an Amazon SageMaker Ground Truth semantic segmentation labeling task. Use a private workforce as the labeling workforce.

B : Use Amazon Rekognition Custom Labels to label the dataset and create a custom Amazon Rekognition object detection model. Create a workforce with a third-party AWS Marketplace vendor.

Use Amazon Augmented AI (Amazon A2I) to review the low-confidence predictions and retrain the custom Amazon Rekognition model.

C : Use Amazon Rekognition Custom Labels to label the dataset and create a custom Amazon Rekognition object detection model. Create a private workforce.

Use Amazon Augmented AI (Amazon A2I) to review the low-confidence predictions and retrain the custom Amazon Rekognition model.

D : Use an Amazon SageMaker Ground Truth object detection labeling task. Use Amazon Mechanical Turk as the labeling workforce.

Answer: D

Question 3

What is a key advantage of a complex machine learning model?

Options :

A : Speed of data processing

B : High accuracy

C : Low computational requirements

D : High explainability

Answer: B

Question 4

How does the Amazon flywheel model ensure continuous improvement and growth?

Options :

A : By using feedback loops that integrate customer experience, selection, and pricing.

B : By limiting the scope of operational improvements to cost reduction only.

C : By avoiding changes to business practices.

D : By maintaining a static approach to business operations.

Answer: A

Question 5

What feature does Amazon SageMaker provide for developers and data scientists?

Options :

A : It automatically identifies potentially fraudulent activities.

B : It delivers highly accurate forecasts.

C : It converts speech to text for various applications.

D : It makes it easy to build, train, and deploy models quickly.

Answer: D

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