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Amazon AWS-Solutions-Associate Exam Syllabus Topics:

SectionWeightObjectives
Design Resilient Architectures26%- 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
          Design Secure Architectures30%- Data protection and encryption
          • 1. Encryption in transit and at rest
            • 2. KMS encryption services
              - Identity and Access Management (IAM)
              • 1. Cross-account access
                • 2. IAM users, roles, and policies
                  • 3. Least privilege access control
                    Design Cost-Optimized Architectures20%- Cost optimization strategies
                    • 1. Right-sizing resources
                      • 2. Reserved and Spot Instances
                        - Cost monitoring and governance
                        • 1. Budget alerts and tagging strategies
                          • 2. AWS Cost Explorer
                            Design High-Performing Architectures24%- Compute optimization
                            • 1. Serverless architectures (Lambda)
                              • 2. EC2 instance selection
                                - Storage and database performance
                                • 1. S3 performance optimization
                                  • 2. RDS and DynamoDB scaling patterns

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                                    Amazon AWS Certified Solutions Architect - Associate (SAA-C03) Sample Questions (Q455-Q460):

                                    NEW QUESTION # 455
                                    An application running on AWS uses an Amazon Aurora Multi-AZ deployment for its database. When evaluating performance metrics, a solutions architect discovered that the database reads are causing high I/O and adding latency to the write requests against the database.
                                    What should the solutions architect do to separate the read requests from the write requests?

                                    Answer: B

                                    Explanation:
                                    Amazon RDS Read Replicas
                                    Amazon RDS Read Replicas provide enhanced performance and durability for RDS database (DB) instances.
                                    They make it easy to elastically scale out beyond the capacity constraints of a single DB instance for read- heavy database workloads. You can create one or more replicas of a given source DB Instance and serve high- volume application read traffic from multiple copies of your data, thereby increasing aggregate read throughput.
                                    Read replicas can also be promoted when needed to become standalone DB instances. Read replicas are available in Amazon RDS for MySQL, MariaDB, PostgreSQL, Oracle, and SQL Server as well as Amazon Aurora.
                                    For the MySQL, MariaDB, PostgreSQL, Oracle, and SQL Server database engines, Amazon RDS creates a second DB instance using a snapshot of the source DB instance. It then uses the engines' native asynchronous replication to update the read replica whenever there is a change to the source DB instance. The read replica operates as a DB instance that allows only read-only connections; applications can connect to a read replica just as they would to any DB instance. Amazon RDS replicates all databases in the source DB instance.
                                    Amazon Aurora further extends the benefits of read replicas by employing an SSD-backed virtualized storage layer purpose-built for database workloads. Amazon Aurora replicas share the same underlying storage as the source instance, lowering costs and avoiding the need to copy data to the replica nodes. For more information about replication with Amazon Aurora, see the online documentation.

                                    Reference: https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_ReadRepl.html
                                    https://aws.amazon.com/rds/features/read-replicas/


                                    NEW QUESTION # 456
                                    A media publishing company is building an application that allows users to print custom books. The frontend runs in a Docker container. Incoming order volume is highly variable and can exceed the throughput of the physical printing machines. Order-processing payloads can be up to 4 MB.
                                    The company needs a scalable solution for handling incoming orders.
                                    Which solution will meet this requirement?

                                    Answer: C

                                    Explanation:
                                    Amazon SQS is the AWS-recommended service for handling decoupled, scalable, ordered, durable message ingestion with potentially large workloads. It supports payloads up to 256 KB directly and up to several MB using S3-backed large-payload extensions.
                                    Lambda functions can process messages from SQS with automatic scaling. ECS with the Fargate launch type provides a serverless container platform for the frontend, scaling based on demand without managing servers.
                                    SNS (Options B and D) is not a queue, does not provide durable message buffering, and is not appropriate for variable, bursty workloads that may exceed backend throughput. Lambda@Edge (Options A and D) is unsuitable for backend order processing because it runs at CloudFront edge locations with strict limitations.


                                    NEW QUESTION # 457
                                    Which of the following statements is NOT true about using Elastic IP Address (EIP) in EC2-Classic and EC2-VPC platforms?

                                    Answer: C

                                    Explanation:
                                    In the EC2-Classic platform, when you associate an Elastic IP Address (EIP) with an instance, the instance's current public IP address is released to the EC2-Classic public IP address pool. If you disassociate an EIP from the instance, the instance is automatically assigned a new public IP address within a few minutes. In addition, stopping the instance also disassociates the EIP from it.
                                    But in the EC2-VPC platform, when you associate an EIP with an instance in a default Virtual Private Cloud (VPC), or an instance in which you assigned a public IP to the eth0 network interface during launch, its current public IP address is released to the EC2-VPC public IP address pool. If you disassociate an EIP from the instance, the instance is automatically assigned a new public IP address within a few minutes. However, if you have attached a second network interface to the instance, the instance is not automatically assigned a new public IP address; you'll have to associate an EIP with it manually. The EIP remains associated with the instance when you stop it.
                                    Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/elastic-ip-addresses-eip.html


                                    NEW QUESTION # 458
                                    You have just set up your first Elastic Load Balancer (ELB) but it does not seem to be configured properly.
                                    You discover that before you start using ELB, you have to configure the listeners for your load balancer.
                                    Which protocols does ELB use to support the load balancing of applications?

                                    Answer: A

                                    Explanation:
                                    Before you start using Elastic Load Balancing(ELB), you have to configure the listeners for your load balancer. A listener is a process that listens for connection requests. It is configured with a protocol and a port number for front-end (client to load balancer) and back-end (load balancer to back-end instance) connections.
                                    Elastic Load Balancing supports the load balancing of applications using HTTP, HTTPS (secure HTTP), TCP, and SSL (secure TCP) protocols. The HTTPS uses the SSL protocol to establish secure connections over the HTTP layer. You can also use SSL protocol to establish secure connections over the TCP layer.
                                    The acceptable ports for both HTTPS/SSL and HTTP/TCP connections are 25, 80, 443, 465, 587, and
                                    1 024-65535.
                                    Reference:
                                    http://docs.aws.amazon.com/ElasticLoadBalancing/latest/DeveloperGuide/elb-listener-config.html


                                    NEW QUESTION # 459
                                    A company uses Amazon S3 for storing a variety of files. A Solutions Architect needs to design a feature that will allow users to instantly restore any deleted files within 30 days of deletion.
                                    Which is the MOST cost-efficient solution?

                                    Answer: C


                                    NEW QUESTION # 460
                                    ......

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