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Amazon AWS-Solutions-Associate Exam Syllabus Topics:

Section	Weight	Objectives
Design High-Performing Architectures	24%	- Compute optimization 1. EC2 instance selection 2. Serverless architectures (Lambda) - Storage and database performance 1. S3 performance optimization 2. RDS and DynamoDB scaling patterns
Design Secure Architectures	30%	- Identity and Access Management (IAM) 1. Cross-account access 2. IAM users, roles, and policies 3. Least privilege access control - Data protection and encryption 1. KMS encryption services 2. Encryption in transit and at rest
Design Cost-Optimized Architectures	20%	- Cost monitoring and governance 1. AWS Cost Explorer 2. Budget alerts and tagging strategies - Cost optimization strategies 1. Reserved and Spot Instances 2. Right-sizing resources
Design Resilient Architectures	26%	- Highly available architectures 1. Multi-AZ deployments 2. Auto Scaling and Load Balancing - Disaster recovery 1. RTO and RPO planning 2. Backup and restore strategies

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Amazon AWS Certified Solutions Architect - Associate (SAA-C03) Sample Questions (Q582-Q587):

NEW QUESTION # 582
A company is planning to move its data to an Amazon S3 bucket. The data must be encrypted when it is stored in the S3 bucket. Additionally, the encryption key must be automatically rotated every year.
Which solution will meet these requirements with the LEAST operational overhead?

A. Move the data to the S3 bucket. Use server-side encryption with Amazon S3 managed encryption keys (SSE-S3). Use the built-in key rotation behavior of SSE-S3 encryption keys.
B. Encrypt the data with customer key material before moving the data to the S3 bucket. Create an AWS Key Management Service (AWS KMS) key without key material. Import the customer key material into the KMS key. Enable automatic key rotation.
C. Create an AWS Key Management Service (AWS KMS) customer managed key. Set the S3 bucket's default encryption behavior to use the customer managed KMS key. Move the data to the S3 bucket.
Manually rotate the KMS key every year.
D. Create an AWS Key Management Service {AWS KMS) customer managed key. Enable automatic key rotation. Set the S3 bucket's default encryption behavior to use the customer managed KMS key. Move the data to the S3 bucket.

Answer: D

Explanation:
SSE-S3 - is free and uses AWS owned CMKs (CMK = Customer Master Key). The encryption key is owned and managed by AWS, and is shared among many accounts. Its rotation is automatic with time that varies as shown in the table here. The time is not explicitly defined.
SSE-KMS - has two flavors:
AWS managed CMK. This is free CMK generated only for your account. You can only view it policies and audit usage, but not manage it. Rotation is automatic - once per 1095 days (3 years), Customer managed CMK. This uses your own key that you create and can manage. Rotation is not enabled by default. But if you enable it, it will be automatically rotated every 1 year. This variant can also use an imported key material by you. If you create such key with an imported material, there is no automated rotation. Only manual rotation.
SSE-C - customer provided key. The encryption key is fully managed by you outside of AWS. AWS will not rotate it.
This solution meets the requirements of moving data to an Amazon S3 bucket, encrypting the data when it is stored in the S3 bucket, and automatically rotating the encryption key every year with the least operational overhead. AWS Key Management Service (AWS KMS) is a service that enables you to create and manage encryption keys for your data. A customer managed key is a symmetric encryption key that you create and manage in AWS KMS. You can enable automatic key rotation for a customer managed key, which means that AWS KMS generates new cryptographic material for the key every year. You can set the S3 bucket's default encryption behavior to use the customer managed KMS key, which means that any object that is uploaded to the bucket without specifying an encryption method will be encrypted with that key.
Option A is incorrect because using server-side encryption with Amazon S3 managed encryption keys (SSE- S3) does not allow you to control or manage the encryption keys. SSE-S3 uses a unique key for each object, and encrypts that key with a master key that is regularly rotated by S3. However, you cannot enable or disable key rotation for SSE-S3 keys, or specify the rotation interval. Option C is incorrect because manually rotating the KMS key every year can increase the operational overhead and complexity, and it may not meet the requirement of rotating the key every year if you forget or delay the rotationprocess. Option D is incorrect because encrypting the data with customer key material before moving the data to the S3 bucket can increase the operational overhead and complexity, and it may not provide consistent encryption for all objects in the bucket. Creating a KMS key without key material and importing the customer key material into the KMS key can enable you to use your own source of random bits to generate your KMS keys, but it does not support automatic key rotation.
References:
https://docs.aws.amazon.com/kms/latest/developerguide/concepts.html
https://docs.aws.amazon.com/kms/latest/developerguide/rotate-keys.html
https://docs.aws.amazon.com/AmazonS3/latest/userguide/bucket-encryption.html

NEW QUESTION # 583
A solutions architect has configured the following IAM policy.

Which action will be allowed by the policy?

A. An AWS Lambda function can be created from any network.
B. An AWS Lambda function can be deleted from the 220.100.16.0/20 network.
C. An AWS Lambda function can be deleted from any network.
D. An AWS Lambda function can be deleted from the 100.220.0.0/20 network.

Answer: D

NEW QUESTION # 584
A company hosts a website on Amazon EC2 instances behind an Application Load Balancer (ALB) The website serves static content Website traffic is increasing and the company is concerned about a potential increase in cost.
What should a solutions architect do to reduce the cost of the website?

A. Create an Amazon ElastiCache cluster Connect the ALB to the ElastiCache cluster to serve cached files.
B. Create an Amazon CloudFront distribution to cache static files at edge locations.
C. Create an AWS WAF web ACL and associate it with the ALB. Add a rule to the web ACL to cache static files.
D. Create a second ALB in an alternative AWS Region Route user traffic to the closest Region to minimize data transfer costs

Answer: B

Explanation:
Explanation
Amazon CloudFront is a content delivery network (CDN) that can improve the performance and reduce the cost of serving static content from a website. CloudFront can cache static files at edge locations closer to the users, reducing the latency and data transfer costs. CloudFront can also integrate with Amazon S3 as the origin for the static content, eliminating the need for EC2 instances to host the website. CloudFront meets all the requirements of the question, while the other options do not. References:
https://aws.amazon.com/blogs/architecture/architecting-a-low-cost-web-content-publishing-system/
https://nodeployfriday.com/posts/static-website-hosting/
https://aws.amazon.com/cloudfront/

NEW QUESTION # 585
A company has several Amazon EC2 instances set up in a private subnet for security reasons. These instances host applications that read and write large amounts of data to and from Amazon S3 regularly. Currently, subnet routing directs all the traffic destined for the internet through a NAT gateway. The company wants to optimize the overall cost without impacting the ability of the application to communicate with Amazon S3 or the outside internet.
What should a solutions architect do to optimize costs?

A. Create a VPC endpoint for Amazon S3. Attach an endpoint policy to the endpoint. Update the route table to direct traffic to the VPC endpoint.
B. Create an additional NAT gateway. Update the route table to route to the NAT gateway. Update the network ACL to allow S3 traffic.
C. Create an AWS Lambda function outside of the VPC to handle S3 requests. Attach an IAM policy to the EC2 instances, allowing them to invoke the Lambda function.
D. Create an internet gateway. Update the route table to route traffic to the internet gateway. Update the network ACL to allow S3 traffic.

Answer: A

NEW QUESTION # 586
A company hosts a web application in a VPC on AWS. A public Application Load Balancer (ALB) forwards connections from the internet to an Auto Scaling group of Amazon EC2 instances. The Auto Scaling group runs in private subnets across four Availability Zones.
The company stores data in an Amazon S3 bucket in the same Region. The EC2 instances use NAT gateways in each Availability Zone for outbound internet connectivity.
The company wants to optimize costs for its AWS architecture.
Which solution will meet this requirement?

A. Deploy an S3 gateway endpoint to the VPC. Configure the EC2 instances to access the S3 bucket through the S3 gateway endpoint.
B. Deploy an S3 interface endpoint to the VPC. Configure the EC2 instances to access the S3 bucket through the S3 interface endpoint.
C. Reconfigure the Auto Scaling group and the ALB to use two Availability Zones instead of four. Do not change the desired count or scaling metrics for the Auto Scaling group to maintain application availability.
D. Create a new, smaller VPC that still has sufficient IP address availability to run the application.
Redeploy the application stack in the new VPC. Delete the existing VPC and its resources.

Answer: A

Explanation:
Using S3 gateway endpoints allows private and cost-free access to S3 without routing traffic through a NAT gateway. NAT gateway traffic incurs charges, especially when used across multiple Availability Zones.
By using an S3 gateway endpoint, EC2 instances in private subnets can access S3 directly without needing internet access, reducing both data transfer and NAT gateway costs.
Interface endpoints are more expensive and typically used for services like API Gateway or Systems Manager.

NEW QUESTION # 587
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