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NEW QUESTION 41 A Solutions Architect created a new Standard-class S3 bucket to store financial reports that are not frequently accessed but should immediately be available when an auditor requests them. To save costs, the Architect changed the storage class of the S3 bucket from Standard to Infrequent Access storage class. In Amazon S3 Standard - Infrequent Access storage class, which of the following statements are true? (Select TWO.)

• A. Ideal to use for data archiving.
• B. It automatically moves data to the most cost-effective access tier without any operational overhead.
• C. It provides high latency and low throughput performance
• D. It is designed for data that is accessed less frequently.
• E. It is designed for data that requires rapid access when needed.

Answer: D,E Explanation: Amazon S3 Standard - Infrequent Access (Standard - IA) is an Amazon S3 storage class for data that is accessed less frequently, but requires rapid access when needed. Standard - IA offers the high durability, throughput, and low latency of Amazon S3 Standard, with a low per GB storage price and per GB retrieval fee. This combination of low cost and high performance make Standard - IA ideal for long-term storage, backups, and as a data store for disaster recovery. The Standard - IA storage class is set at the object level and can exist in the same bucket as Standard, allowing you to use lifecycle policies to automatically transition objects between storage classes without any application changes. Key Features: - Same low latency and high throughput performance of Standard - Designed for durability of 99.999999999% of objects - Designed for 99.9% availability over a given year - Backed with the Amazon S3 Service Level Agreement for availability - Supports SSL encryption of data in transit and at rest - Lifecycle management for automatic migration of objects Hence, the correct answers are: - It is designed for data that is accessed less frequently. - It is designed for data that requires rapid access when needed. The option that says: It automatically moves data to the most cost-effective access tier without any operational overhead is incorrect as it actually refers to Amazon S3 - Intelligent Tiering, which is the only cloud storage class that delivers automatic cost savings by moving objects between different access tiers when access patterns change. The option that says: It provides high latency and low throughput performance is incorrect as it should be "low latency" and "high throughput" instead. S3 automatically scales performance to meet user demands. The option that says: Ideal to use for data archiving is incorrect because this statement refers to Amazon S3 Glacier. Glacier is a secure, durable, and extremely low-cost cloud storage service for data archiving and long-term backup. References: https://aws.amazon.com/s3/storage-classes/ https://aws.amazon.com/s3/faqs Check out this Amazon S3 Cheat Sheet: https://tutorialsdojo.com/amazon-s3/   NEW QUESTION 42 A company recently launched an e-commerce application that is running in eu-east-2 region, which strictly requires six EC2 instances running at all times. In that region, there are 3 Availability Zones (AZ) that you can use - eu-east-2a, eu-east-2b, and eu-east-2c. Which of the following deployments provide 100% fault tolerance if any single AZ in the region becomes unavailable? (Select TWO.)

• A. eu-east-2a with four EC2 instances, eu-east-2b with two EC2 instances, and eu-east-2c with two EC2 instances
• B. eu-east-2a with three EC2 instances, eu-east-2b with three EC2 instances, and eu-east-2c with three EC2 instances
• C. eu-east-2a with six EC2 instances, eu-east-2b with six EC2 instances, and eu-east-2c with no EC2 instances
• D. eu-east-2a with two EC2 instances, eu-east-2b with two EC2 instances, and eu-east-2c with two EC2 instances
• E. eu-east-2a with two EC2 instances, eu-east-2b with four EC2 instances, and eu-east-2c with two EC2 instances

Answer: B,C Explanation: Fault Tolerance is the ability of a system to remain in operation even if some of the components used to build the system fail. In AWS, this means that in the event of server fault or system failures, the number of running EC2 instances should not fall below the minimum number of instances required by the system for it to work properly. So if the application requires a minimum of 6 instances, there should be at least 6 instances running in case there is an outage in one of the Availability Zones or if there are server issues. In this scenario, you have to simulate a situation where one Availability Zone became unavailable for each option and check whether it still has 6 running instances. Hence, the correct answers are: eu-east-2a with six EC2 instances, eu-east-2b with six EC2 instances, and eu-east-2c with no EC2 instances and eu-east-2a with three EC2 instances, eu-east-2b with three EC2 instances, and eu-east-2c with three EC2 instances because even if one of the availability zones were to go down, there would still be 6 active instances. Reference: https://media.amazonwebservices.com/AWSBuildingFaultTolerantApplications.pdf   NEW QUESTION 43 An online events registration system is hosted in AWS and uses ECS to host its front-end tier and an RDS configured with Multi-AZ for its database tier. What are the events that will make Amazon RDS automatically perform a failover to the standby replica? (Select TWO.)

• A. In the event of Read Replica failure
• B. Loss of availability in primary Availability Zone
• C. Compute unit failure on secondary DB instance
• D. Storage failure on primary
• E. Storage failure on secondary DB instance

Answer: B,D Explanation: Amazon RDS provides high availability and failover support for DB instances using Multi-AZ deployments. Amazon RDS uses several different technologies to provide failover support. Multi-AZ deployments for Oracle, PostgreSQL, MySQL, and MariaDB DB instances use Amazon's failover technology. SQL Server DB instances use SQL Server Database Mirroring (DBM). In a Multi-AZ deployment, Amazon RDS automatically provisions and maintains a synchronous standby replica in a different Availability Zone. The primary DB instance is synchronously replicated across Availability Zones to a standby replica to provide data redundancy, eliminate I/O freezes, and minimize latency spikes during system backups. Running a DB instance with high availability can enhance availability during planned system maintenance, and help protect your databases against DB instance failure and Availability Zone disruption. Amazon RDS detects and automatically recovers from the most common failure scenarios for Multi-AZ deployments so that you can resume database operations as quickly as possible without administrative intervention. The high-availability feature is not a scaling solution for read-only scenarios; you cannot use a standby replica to serve read traffic. To service read-only traffic, you should use a Read Replica. Amazon RDS automatically performs a failover in the event of any of the following: Loss of availability in primary Availability Zone. Loss of network connectivity to primary. Compute unit failure on primary. Storage failure on primary. Hence, the correct answers are: - Loss of availability in primary Availability Zone - Storage failure on primary The following options are incorrect because all these scenarios do not affect the primary database. Automatic failover only occurs if the primary database is the one that is affected. - Storage failure on secondary DB instance - In the event of Read Replica failure - Compute unit failure on secondary DB instance References: https://aws.amazon.com/rds/details/multi- az/ https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Concepts.MultiAZ.html Check out this Amazon RDS Cheat Sheet: https://tutorialsdojo.com/amazon-relational-database-service-amazon-rds/   NEW QUESTION 44 A bicycle sharing company is developing a multi-tier architecture to track the location of its bicycles during peak operating hours The company wants to use these data points in its existing analytics platform A solutions architect must determine the most viable multi-tier option to support this architecture The data points must be accessible from the REST API. Which action meets these requirements for storing and retrieving location data?

• A. Use Amazon API Gateway with AWS Lambda
• B. Use Amazon API Gateway with Amazon Kinesis Data Analytics
• C. Use Amazon Athena with Amazon S3
• D. Use Amazon QuickSight with Amazon Redshift.

Answer: B Explanation: Explanation https://aws.amazon.com/solutions/implementations/aws-streaming-data-solution-for-amazon-kinesis/   NEW QUESTION 45 A company is hosting a web application on AWS using a single Amazon EC2 instance that stores user-uploaded documents in an Amazon EBS volume. For better scalability and availability, the company duplicated the architecture and created a second EC2 instance and EBS volume in another Availability Zone placing both behind an Application Load Balancer After completing this change, users reported that, each time they refreshed the website, they could see one subset of their documents or the other, but never all of the documents at the same time. What should a solutions architect propose to ensure users see all of their documents at once?

• A. Configure the Application Load Balancer to send the request to both servers Return each document from the correct server.
• B. Configure the Application Load Balancer to direct a user to the server with the documents
• C. Copy the data from both EBS volumes to Amazon EFS Modify the application to save new documents to Amazon EFS
• D. Copy the data so both EBS volumes contain all the documents.

Answer: C Explanation: Explanation Amazon EFS provides file storage in the AWS Cloud. With Amazon EFS, you can create a file system, mount the file system on an Amazon EC2 instance, and then read and write data to and from your file system. You can mount an Amazon EFS file system in your VPC, through the Network File System versions 4.0 and 4.1 (NFSv4) protocol. We recommend using a current generation Linux NFSv4.1 client, such as those found in the latest Amazon Linux, Redhat, and Ubuntu AMIs, in conjunction with the Amazon EFS Mount Helper. For instructions, see Using the amazon-efs-utils Tools. For a list of Amazon EC2 Linux Amazon Machine Images (AMIs) that support this protocol, see NFS Support. For some AMIs, you'll need to install an NFS client to mount your file system on your Amazon EC2 instance. For instructions, see Installing the NFS Client. You can access your Amazon EFS file system concurrently from multiple NFS clients, so applications that scale beyond a single connection can access a file system. Amazon EC2 instances running in multiple Availability Zones within the same AWS Region can access the file system, so that many users can access and share a common data source.   NEW QUESTION 46 ......