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Amazon SAA-C03 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Design Cost-Optimized Architectures	20%	- Control and monitor costs 1. Resource tagging and allocation 2. Cost management tools and alerts - Design cost-effective compute and network solutions 1. Data transfer cost optimization 2. Right-sizing and reserved instances 3. Serverless and pay-as-you-go models - Identify cost-effective storage solutions 1. Data retention and archiving 2. Storage classes and lifecycle policies
Topic 2: Design Resilient Architectures	26%	- Design decoupled and loosely coupled systems 1. Messaging and queue services 2. Event-driven architectures 3. Serverless and managed service integration - Design highly available and fault-tolerant architectures 1. Replication and disaster recovery strategies 2. Load balancing and auto scaling 3. Regions, Availability Zones, and edge locations - Design for reliability and recovery 1. Backup and restore mechanisms 2. Failover and failback processes
Topic 3: Design High-Performing Architectures	24%	- Design high-performance storage solutions 1. Storage types (object, block, file) 2. Caching and content delivery 3. Storage performance and durability - Design high-performance compute solutions 1. Compute options (EC2, Lambda, ECS, EKS) 2. Instance types and sizing 3. Scaling and performance optimization - Design high-performance networking solutions 1. Network architecture and connectivity 2. Latency reduction and throughput optimization 3. Global acceleration and routing
Topic 4: Design Secure Architectures	30%	- Design for security and threat detection 1. Monitoring and logging services 2. Incident response and security automation - Design secure access to AWS resources 1. Shared responsibility model 2. Multi-account access and control 3. Security best practices and least privilege 4. Identity and access management (IAM, IAM Identity Center) - Design secure workloads and applications 1. Network security (VPC, security groups, NACLs) 2. Compliance and governance controls 3. Data protection and encryption (at rest/in transit)

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Amazon AWS Certified Solutions Architect - Associate Sample Questions (Q616-Q621):

NEW QUESTION # 616
A finance company hosts a data lake in Amazon S3. The company receives financial data records over SFTP each night from several third parties. The company runs its own SFTP server on an Amazon EC2 instance in a public subnet of a VPC. After the files are uploaded, they are moved to the data lake by a cron job that runs on the same instance. The SFTP server is reachable on DNS sftp.example.com through the use of Amazon Route 53.
What should a solutions architect do to improve the reliability and scalability of the SFTP solution?

A. Migrate the SFTP server to a file gateway in AWS Storage Gateway. Update the DNS record sftp.
example.com in Route 53 to point to the file gateway endpoint.
B. Place the EC2 instance behind a Network Load Balancer (NLB). Update the DNS record sftp.example.
com in Route 53 to point to the NLB.
C. Move the EC2 instance into an Auto Scaling group. Place the EC2 instance behind an Application Load Balancer (ALB). Update the DNS record sftp.example.com in Route 53 to point to the ALB.
D. Migrate the SFTP server to AWS Transfer for SFTP. Update the DNS record sftp.example.com in Route 53 to point to the server endpoint hostname.

Answer: D

Explanation:
The optimal way to improve reliability and scalability of SFTP on AWS is to use AWS Transfer Family (for SFTP). It provides a fully managed SFTP server integrated with Amazon S3.
No EC2 instances or infrastructure management is required.
AWS Transfer Family supports custom DNS domains (e.g., sftp.example.com) and allows integration with existing authentication mechanisms like LDAP, AD, or custom identity providers.
Files are uploaded directly to S3, eliminating the need for cron jobs to move data from EC2 to S3.
Built-in high availability and scalability removes the burden of managing infrastructure.
Other options:
A and D still require manual scaling, server maintenance, and cron jobs.
C (Storage Gateway) is used for hybrid file access, not for replacing an SFTP server.
# Reference:
AWS Transfer Family for SFTP

NEW QUESTION # 617
A company has an application that generates a large number of files. File sizes vary between 1 KB and 10 MB. The company wants to build a store-and-forward solution that keeps the files in a temporary Amazon S3 location. The solution must then preprocess the files and archive them to S3 Glacier Flexible Retrieval.
Which combination of steps will meet these requirements MOST cost-effectively? (Select THREE.)

A. For files that are 128 KB or smaller, use an AWS Lambda function to add the files to a ZIP archive.
Move the ZIP archive to S3 Glacier Flexible Retrieval when the ZIP file reaches 1 MB.
B. Configure the temporary S3 location to use the S3 Standard-Infrequent Access (S3 Standard-IA) storage class.
C. For files that are 128 KB or smaller, use an AWS Lambda function to change the files' storage class to S3 One Zone-Infrequent Access (S3 One Zone-IA).
D. Use S3 Event Notifications to invoke an AWS Lambda function when a new file is moved into the temporary S3 location.
E. Use event source mappings to invoke an AWS Lambda function when a new file is moved into the temporary S3 location.
F. Configure the temporary S3 location to use the S3 Standard storage class.

Answer: A,D,F

Explanation:
S3 Standard is appropriate for temporary files that will be processed and moved quickly because it has no minimum storage-duration charge. S3 Standard-IA would be inefficient for short-lived temporary objects because it applies minimum storage-duration and minimum billable object-size considerations. S3 Event Notifications can invoke Lambda directly when objects are created, enabling event-driven preprocessing without polling. Lambda event source mappings are used with supported stream and queue sources, such as Amazon SQS or Kinesis, rather than directly with S3 buckets. Combining very small files into a larger ZIP archive reduces the number of archived objects, retrieval requests, and per-object metadata overhead associated with archival storage. Moving each small file to S3 One Zone-IA would add an unnecessary intermediate tier and provide lower resilience before archival. Therefore, A, B, and D form the most economical workflow.

NEW QUESTION # 618
A company wants to deploy a new public web application on AWS The application includes a web server tier that uses Amazon EC2 instances The application also includes a database tier that uses an Amazon RDS for MySQL DB instance The application must be secure and accessible for global customers that have dynamic IP addresses How should a solutions architect configure the security groups to meet these requirements'?

A. Configure the security group for the web servers to allow inbound traffic on port 443 from 0.0.0.0.0 Configure the security group for the DB instance to allow inbound traffic on port 3306 from 0.0.0.0/0)
B. Configure the security group for the web servers to allow inbound traffic on port 443 from the IP addresses of the customers Configure the security group for the DB instance lo allow inbound traffic on port 3306 from the security group of the web servers
C. Configure the security group tor the web servers lo allow inbound traffic on port 443 from 0.0.0. 0/0) Configure the security group for the DB instance to allow inbound traffic on port 3306 from the security group of the web servers
D. Configure the security group for the web servers to allow inbound traffic on port 443 from the IP addresses of the customers Configure the security group for the DB instance to allow inbound traffic on port 3306 from the IP addresses of the customers

Answer: C

Explanation:
Restricting inbound access to the web servers to only port 443, which is used for HTTPS traffic, and allowing access from any IP address (0.0.0.0/0), since the application is public and accessible for global customers.
Restricting inbound access to the DB instance to only port 3306, which is used for MySQL traffic, and allowing access only from the security group of the web servers, which creates a secure connection between the two tiers and prevents unauthorized access to the database.
Restricting outbound access to the minimum required for both tiers, which is not specified in the question but can be assumed to be similar to the inbound rules.
References:
Security groups - Amazon Virtual Private Cloud
5 Best Practices for AWS Security Groups - DZone

NEW QUESTION # 619
A solutions architect needs to implement a solution that can handle up to 5,000 messages per second. The solution must publish messages as events to multiple consumers. The messages are upto 500 KB in size. The message consumers need to have the ability to use multiple programming languages to consume the messages with minimal latency. The solution must retain published messages for more than 3 months. The solution must enforce strict ordering of the messages.
Which solution will meet these requirements?

A. Publish messages to an Amazon Simple Notification Service (Amazon SNS) topic. Ensure that consumers use an Amazon Simple Queue Service (Amazon SQS) FIFO queue to subscribe to the topic.
B. Publish messages to an Amazon Simple Notification Service (Amazon SNS) topic. Ensure that consumers use Amazon Data Firehose to subscribe to the topic.
C. Publish messages to Amazon EventBridge. Allow each consumer to create rules to deliver messages to the consumer's own target.
D. Publish messages to an Amazon Kinesis Data Streams data stream. Enable enhanced fan-out. Ensure that consumers ingest the data stream by using dedicated throughput.

Answer: D

Explanation:
A:Kinesis Data Streams:Supports high throughput, strict ordering, multiple consumers, and data retention for
365 days.
B:SNS + SQS FIFO:Can enforce ordering but lacks native support for 500 KB messages and retention requirements.
C:EventBridge:Lacks strict ordering and message size compatibility.
D:SNS + Firehose:Not designed for strict ordering or large message sizes.
References:Amazon Kinesis Data Streams

NEW QUESTION # 620
A company is deploying a new application on Amazon EC2 instances. The application writes data to Amazon Elastic Block Store (Amazon EBS) volumes. The company needs to ensure that all data that is written to the EBS volumes is encrypted at rest.
Which solution wil meet this requirement?

A. Create an IAM role that specifies EBS encryption. Attach the role to the EC2 instances.
B. Create an AWS Key Management Service (AWS KMS) key policy that enforces EBS encryption in the account Ensure that the key policy is active.
C. Create the EBS volumes as encrypted volumes Attach the EBS volumes to the EC2 instances.
D. Create an EC2 instance tag that has a key of Encrypt and a value of True. Tag all instances that require encryption at the ESS level.

Answer: C

Explanation:
Explanation
The solution that will meet the requirement of ensuring that all data that is written to the EBS volumes is encrypted at rest is B. Create the EBS volumes as encrypted volumes and attach the encrypted EBS volumes to the EC2 instances. When you create an EBS volume, you can specify whether to encrypt the volume. If you choose to encrypt the volume, all data written to the volume is automatically encrypted at rest using AWS-managed keys. You can also use customer-managed keys (CMKs) stored in AWS KMS to encrypt and protect your EBS volumes. You can create encrypted EBS volumes and attach them to EC2 instances to ensure that all data written to the volumes is encrypted at rest.

NEW QUESTION # 621
......

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