Amazon Web Services Updated SOA-C02 Exam Questions and Answers by may

AWS Compute Optimizer Overview:

AWS Compute Optimizer analyzes the configuration and utilization of AWS resources, including EBS volumes, to provide cost-optimization recommendations.

Steps to Use AWS Compute Optimizer for EBS Volumes:

Enable Compute Optimizer:

Open the Compute Optimizer Console.

Enable the service for your account.

Allow Metrics Collection:

Allow sufficient time (up to 12 hours) for Compute Optimizer to gather metrics on your EBS volumes.

Review Recommendations:

Go to the Compute Optimizer dashboard.

Navigate to the EBS volume recommendations.

Review the findings for underutilized or overprovisioned volumes.

Why Other Options Are Incorrect:

A: Manually reviewing EC2 monitoring graphs is less efficient and prone to errors compared to Compute Optimizer.

B: Changing instance types to EBS-optimized without assessing performance is unnecessary and unrelated to cost optimization.

D: Installing the fio tool and benchmarking is a time-intensive, manual process that does not align with operational efficiency.

References:

AWS Compute Optimizer Documentation

EBS Volume Optimization

Update AWS Account Name:

The AWS account name can only be changed by the root user of the account.

Steps:

Sign in to the AWS Management Console using the root user credentials.

Navigate to the "My Account" page.

Update the account name field and save the changes.

Step-by-Step Explanation:

Understand the Problem:

A user cannot upload an object to an S3 bucket using a presigned URL, even though the URL is valid and the bucket has no policy applied.

Analyze the Requirements:

Determine the cause of the issue preventing the upload via the presigned URL.

Evaluate the Options:

Option A: The user has not properly configured the AWS CLI.

CLI configuration is not relevant to using a presigned URL.

Option B: The SysOps administrator does not have the necessary permissions.

The administrator's permissions are required to generate a valid presigned URL with sufficient permissions.

Option C: A bucket policy is required.

A bucket policy is not necessary if the presigned URL has the correct permissions.

Option D: The object has already been uploaded.

A presigned URL remains valid until it expires or the specified permissions are revoked.

Select the Best Solution:

Option B: Ensuring that the SysOps administrator has the necessary permissions to upload objects to the S3 bucket is crucial for generating valid presigned URLs.

References:

Amazon S3 Presigned URLs

IAM Policies for Amazon S3

The SysOps administrator must have the necessary permissions to upload objects to the S3 bucket, ensuring that the presigned URL generated allows the user to upload successfully.

To prevent Amazon RDS for PostgreSQL Multi-AZ DB instances from running low on disk space, enabling storage auto-scaling is the most straightforward solution. This feature automatically adjusts the storage capacity of the DB instance when it approaches its limit, thus preventing the database from running out of space and triggering CloudWatch alarms. Option C is the least intrusive and most effective solution as it only requires a modification to the existing CloudFormation template to enable auto-scaling on storage. For reference, see AWS documentation on managing RDS storage automatically Managing RDS Storage Automatically.