SAA-C03 Exam Dumps - AWS Certified Solutions Architect - Associate (SAA-C03)

This answer is correct because it provides high availability at the node level and at the Region level for the ElastiCache for Redis solution. A Multi-AZ Redis replication groupconsists of a primary cluster and up to five read replica clusters, each in a different Availability Zone. If the primary cluster fails, one of the read replicas is automatically promoted to be the new primary cluster. A Redis replication group with shards enables partitioning of the data across multiple nodes, which increases the scalability and performance of the solution. Each shard can have one or more replicas to provide redundancy and read scaling.

A. Create an Amazon API Gateway REST API. Configure the method to use the Lambda function. Enable IAM authentication on the API. This option is the most operationally efficient as it allows you to use API Gateway to handle the HTTPS endpoint and also allows you to useIAM to authenticate the calls to the microservice. API Gateway also provides manyadditional features such as caching, throttling, and monitoring, which can be useful for a microservice.

Amazon API Gateway is a fully managed service that makes it easy for developers to create, publish, maintain, monitor, and secure APIs at any scale. AWS Lambda is a serverless compute service that lets you run code without provisioning or managing servers. Lambda scales automatically based on the incoming requests, but it may take some time to initialize new instances of your function if there is a sudden increase in demand. This may result in high latency or cold starts for your API. To avoid this, you can use provisioned concurrency, which ensures that your function is initialized and ready to respond at any time. Provisioned concurrency also helps you achieve consistent low latency for your API by reducing the impact of scaling on performance. References:https://docs.aws.amazon.com/apigateway/latest/developerguide/http-api-develop- integrations-lambda.htmlhttps://docs.aws.amazon.com/lambda/latest/dg/configuration-concurrency.html

Provisioned capacity is best if you have relatively predictable application traffic, run applications whose traffic is consistent, and ramps up or down gradually. On-demand capacity mode is best when you have unknown workloads, unpredictable application traffic and also if you only want to pay exactly for what you use. The on-demand pricing model is ideal for bursty, new, or unpredictable workloads whose traffic can spike in seconds or minutes, and when under-provisioned capacity would impact the userexperience.https://docs.aws.amazon.com/wellarchitected/latest/serverless-applications-lens/capacity.html

AWS Storage Gateway is a service that connects an on-premises software appliance with cloud-based storage to provide seamless and secure integration between an organization's on-premises IT environment and AWS's storage infrastructure. By deploying a file gateway as a virtual machine on each clinic's premises, the medical research lab can provide low-latency access to the data stored in the S3 bucket while maintaining read-only permissions for each clinic. Thissolution allows the clinics to access the data files directly from their on-premises file-based applications without the need for data transfer or migration.

S3 Storage Lens is a fully managed S3 storage analytics solution that provides a comprehensive view of object storage usage, activity trends, and recommendations to optimize costs. Storage Lens allows you to analyze object access patterns across all of your S3 buckets and generate detailed metrics and reports.

AWS Backup provides a centralized, fully managed solution to automate and manage backups for a wide range of AWS resources, including Aurora databases. Configuring a backup plan with daily backups and a 90-day retention policy ensures operational efficiency and simplicity for compliance purposes.

Option A:Aurora automated backups support point-in-time recovery but do not provide the operational efficiency of a centralized backup management system like AWS Backup.

Option B:AWS Backup with point-in-time recovery is a valid solution but does not specify daily backups with retention, which is the most operationally efficient approach.

Option C:Manual backups require significant operational overhead to create and delete backups regularly, which is not efficient.

Option D:Using AWS Backup with a daily backup plan and 90-day retention provides an automated and efficient solution.

AWS Documentation References:

AWS Backup Overview

Backing Up Aurora Databases

AWS ParallelCluster is a service that allows you to create and manage high-performance computing (HPC) clusters on AWS. It supports multiple schedulers, including AWS Batch, which can run distributed workloads across multiple EC2 instances1.

MPI is a standard for message passing between processes in parallel computing. It provides functions for sending and receiving data, synchronizing processes, and managingcommunication groups2.

By using AWS ParallelCluster and MPI libraries, you can take advantage of the following benefits:

You can easily create and configure HPC clusters that meet your specific requirements, such as instance type, number of nodes, network configuration, and storage options1.

You can leverage the scalability and elasticity of AWS to run large-scale parallel workloads without worrying about provisioning or managing servers1.

You can use MPI libraries to optimize the performance and efficiency of your parallel applications by enabling inter-process communication and data exchange2.

You can choose from a variety of MPI implementations that are compatible with AWS ParallelCluster, such as Open MPI, Intel MPI, and MPICH3.