A Machine Learning Specialist is training a model to identify the make and model of vehicles in images The Specialist wants to use transfer learning and an existing model trained on images of general objects The Specialist collated a large custom dataset of pictures containing different vehicle makes and models

1. A. Initialize the model with random weights in all layers including the last fully connected layer
2. B. Initialize the model with pre-trained weights in all layers and replace the last fully connected layer.
3. C. Initialize the model with random weights in all layers and replace the last fully connected layer
4. D. Initialize the model with pre-trained weights in all layers including the last fully connected layer

Correct Answer: B

IT leadership wants Jo transition a company's existing machine learning data storage environment to AWS as a temporary ad hoc solution The company currently uses a custom software process that heavily leverages SOL as a query language and exclusively stores generated csv documents for machine learning
The ideal state for the company would be a solution that allows it to continue to use the current workforce of SQL experts The solution must also support the storage of csv and JSON files, and be able to query over semi-structured data The following are high priorities for the company:
• Solution simplicity
• Fast development time
• Low cost
• High flexibility
What technologies meet the company's requirements?

1. A. Amazon S3 and Amazon Athena
2. B. Amazon Redshift and AWS Glue
3. C. Amazon DynamoDB and DynamoDB Accelerator (DAX)
4. D. Amazon RDS and Amazon ES

Correct Answer: B

A Machine Learning Specialist needs to create a data repository to hold a large amount of time-based training data for a new model. In the source system, new files are added every hour Throughout a single 24-hour period, the volume of hourly updates will change significantly. The Specialist always wants to train on the last 24 hours of the data
Which type of data repository is the MOST cost-effective solution?

1. A. An Amazon EBS-backed Amazon EC2 instance with hourly directories
2. B. An Amazon RDS database with hourly table partitions
3. C. An Amazon S3 data lake with hourly object prefixes
4. D. An Amazon EMR cluster with hourly hive partitions on Amazon EBS volumes

Correct Answer: C

A Marketing Manager at a pet insurance company plans to launch a targeted marketing campaign on social media to acquire new customers Currently, the company has the following data in Amazon Aurora
• Profiles for all past and existing customers
• Profiles for all past and existing insured pets
• Policy-level information
• Premiums received
• Claims paid
What steps should be taken to implement a machine learning model to identify potential new customers on social media?

1. A. Use regression on customer profile data to understand key characteristics of consumer segments Find similar profiles on social media.
2. B. Use clustering on customer profile data to understand key characteristics of consumer segments Find similar profiles on social media.
3. C. Use a recommendation engine on customer profile data to understand key characteristics of consumer segment
4. D. Find similar profiles on social media
5. E. Use a decision tree classifier engine on customer profile data to understand key characteristics of consumer segment
6. F. Find similar profiles on social media

Correct Answer: C

A Machine Learning Specialist at a company sensitive to security is preparing a dataset for model training. The dataset is stored in Amazon S3 and contains Personally Identifiable Information (Pll). The dataset:
* Must be accessible from a VPC only.
* Must not traverse the public internet. How can these requirements be satisfied?

1. A. Create a VPC endpoint and apply a bucket access policy that restricts access to the given VPC endpoint and the VPC.
2. B. Create a VPC endpoint and apply a bucket access policy that allows access from the given VPC endpoint and an Amazon EC2 instance.
3. C. Create a VPC endpoint and use Network Access Control Lists (NACLs) to allow traffic between only the given VPC endpoint and an Amazon EC2 instance.
4. D. Create a VPC endpoint and use security groups to restrict access to the given VPC endpoint and an Amazon EC2 instance.

Correct Answer: B