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AWS Certified Solutions Architect - Professional Questions and Answers

Question 153

A company is building an application on Amazon EMR to analyze data. The following user groups need to perform different actions:

• Administrator: Provision EMR clusters from different configurations.

• Data engineer: Create an EMR cluster from a small set of available configurations. Run ETL scripts to process data.

• Data analyst: Create an EMR cluster with a specific configuration. Run SQL queries and Apache Hive queries on the data.

A solutions architect must design a solution that gives each group the ability to launch only its authorized EMR configurations. The solution must provide the groups with least privilege access to only the resources that they need. The solution also must provide tagging for all resources that the groups create.

Which solution will meet these requirements?

Options:

A.

Configure AWS Service Catalog to control the Amazon EMR versions available for deployment, the cluster configurations, and the permissions for each user group.

B.

Configure Kerberos-based authentication for EMR clusters when the EMR clusters launch. Specify a Kerberos security configuration and cluster-specific Kerberos options.

C.

Create IAM roles for each user group. Attach policies to the roles to define allowed actions for users. Create an AWS Config rule to check for noncompliant resources. Configure the rule to notify the company to address noncompliant resources.

D.

Use AWS CloudFormation to launch EMR clusters with attached resource policies. Create an AWS Config rule to check for noncompliant resources. Configure the rule to notify the company to address noncompliant resources.

Question 154

A solutions architect is designing the data storage and retrieval architecture for a new application that a company will be launching soon. The application is designed to ingest millions of small records per minute from devices all around the world. Each record is less than 4 KB in size and needs to be stored in a durable location where it can be retrieved with low latency. The data is ephemeral and the company is required to store the data for 120 days only, after which the data can be deleted.

The solutions architect calculates that, during the course of a year, the storage requirements would be about 10-15 TB.

Which storage strategy is the MOST cost-effective and meets the design requirements?

Options:

A.

Design the application to store each incoming record as a single .csv file in an Amazon S3 bucket to allow for indexed retrieval. Configure a lifecycle policy to delete data older than 120 days.

B.

Design the application to store each incoming record in an Amazon DynamoDB table properly configured for the scale. Configure the DynamoOB Time to Live (TTL) feature to delete records older than 120 days.

C.

Design the application to store each incoming record in a single table in an Amazon RDS MySQL database. Run a nightly cron job that executes a query to delete any records older than 120 days.

D.

Design the application to batch incoming records before writing them to an Amazon S3 bucket. Update the metadata for the object to contain the list of records in the batch and use the Amazon S3 metadata search feature to retrieve the data. Configure a lifecycle policy to delete the data after 120 days.

Question 155

A solutions architect is auditing the security setup of an AWS Lambda function for a company. The Lambda function retrieves the latest changes from an Amazon Aurora database. The Lambda function and the database run in the same VPC. Lambda environment variables are providing the database credentials to the Lambda function.

The Lambda function aggregates data and makes the data available in an Amazon S3 bucket that is configured for server-side encryption with AWS KMS managed encryption keys (SSE-KMS). The data must not travel across the internet. If any database credentials become compromised, the company needs a solution that minimizes the impact of the compromise.

What should the solutions architect recommend to meet these requirements?

Options:

A.

Enable IAM database authentication on the Aurora DB cluster. Change the IAM role for the Lambda function to allow the function to access the database by using IAM database authentication. Deploy a gateway VPC endpoint for Amazon S3 in the VPC.

B.

Enable IAM database authentication on the Aurora DB cluster. Change the IAM role for the Lambda function to allow the function to access the database by using IAM database authentication. Enforce HTTPS on the connection to Amazon S3 during data transfers.

C.

Save the database credentials in AWS Systems Manager Parameter Store. Set up password rotation on the credentials in Parameter Store. Change the IAM role for the Lambda function to allow the function to access Parameter Store. Modify the Lambda function to retrieve the credentials from Parameter Store. Deploy a gateway VPC endpoint for Amazon S3 in the VPC.

D.

Save the database credentials in AWS Secrets Manager. Set up password rotation on the credentials in Secrets Manager. Change the IAM role for the Lambda function to allow the function to access Secrets Manager. Modify the Lambda function to retrieve the credentials Om Secrets Manager. Enforce HTTPS on the connection to Amazon S3 during data transfers.

Question 156

A company has an application that runs on Amazon EC2 instances. A solutions architect is designing VPC infrastructure in an AWS Region where the application needs to access an Amazon Aurora DB cluster. The EC2 instances are all associated with the same security group. The DB cluster is associated with its own security group.

The solutions architect needs to add rules to the security groups to provide the application with least privilege access to the DB cluster.

Which combination of steps will meet these requirements? (Select TWO.)

Options:

A.

Add an inbound rule to the EC2 instances' security group. Specify the DB cluster's security group as the source over the default Aurora port.

B.

Add an outbound rule to the EC2 instances' security group. Specify the DB cluster's security group as the destination over the default Aurora port.

C.

Add an inbound rule to the DB cluster's security group. Specify the EC2 instances' security group as the source over the default Aurora port.

D.

Add an outbound rule to the DB cluster's security group. Specify the EC2 instances' security group as the destination over the default Aurora port.

E.

Add an outbound rule to the DB cluster's security group. Specify the EC2 instances' security group as the destination over the ephemeral ports.

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