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| Section | Weight | Objectives |
|---|---|---|
| Continuous Improvement for Existing Solutions | 23% | - Security hardening
|
| Design for Organizational Complexity | 12.5% | - Multi-account AWS environments - Cross-account strategies and AWS organizations
|
| Cost Control | 18.5% | - Rightsizing recommendations - Resource efficiency
|
| Migration Planning | 15% | - Data migration considerations
|
| Design for New Solutions | 31% | - High availability and fault tolerance
|
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NEW QUESTION # 467
A company is processing videos in the AWS Cloud by using Amazon EC2 instances in an Auto Scaling group. It takes 30 minutes to process a video. Several EC2 instances scale in and out depending on the number of videos in an Amazon Simple Queue Service (Amazon SQS) queue.
The company has configured the SQS queue with a redrive policy that specifies a target dead- letter queue and a maxReceiveCount of 1. The company has set the visibility timeout for the SQS queue to 1 hour. The company has set up an Amazon CloudWatch alarm to notify the development team when there are messages in the dead-letter queue.
Several times during the day, the development team receives notification that messages are in the dead-letter queue and that videos have not been processed properly. An investigation finds no errors in the application logs.
How can the company solve this problem?
Answer: B
NEW QUESTION # 468
An application is using an Amazon RDS for MySQL Multi-AZ DB instance in the us-east-1 Region. After a failover test, the application lost the connections to the database and could not re-establish the connections. After a restart of the application, the application re-established the connections.
A solutions architect must implement a solution so that the application can re-establish connections to the database without requiring a restart.
Which solution will meet these requirements?
Answer: C
Explanation:
Creating an RDS Proxy and configuring the existing RDS endpoint as a target, and then updating the connection settings in the application to point to the RDS proxy endpoint will meet the requirement of the application being able to re-establish connections to the database without requiring a restart.
Amazon RDS Proxy is a fully managed, highly available database proxy for Amazon RDS that makes applications more scalable, more resilient to database failures, and more secure. With RDS Proxy, applications can pool and share connections to RDS databases, reducing the number of connections each RDS instance needs to handle. This can improve the performance and scalability of the application.
In the event of a failover or interruption, RDS Proxy automatically redirects connections to the new primary instance, so the application can continue to function without interruption. RDS Proxy also provides connection pooling, which reduces the number of connections to the primary RDS instance, so the primary instance can handle more traffic.
Here is an example of how to set up an RDS proxy and configure it to work with an existing RDS instance: 1.Create an RDS proxy in the AWS Management Console, and configure it to use the existing RDS instance as a target.
Update the connection settings in the application to use the RDS proxy endpoint instead of the RDS instance endpoint.
Reference:
https://aws.amazon.com/rds/proxy/
https://aws.amazon.com/blogs/database/using-amazon-rds-proxy-with-amazon-rds-for-mysql-and-amazon-aurora-mysql-to-improve-app-scalability-and-availability/
NEW QUESTION # 469
A company is designing an AWS environment tor a manufacturing application. The application has been successful with customers, and the application's user base has increased. The company has connected the AWS environment to the company's on-premises data center through a 1 Gbps AWS Direct Connect connection. The company has configured BGP for the connection.
The company must update the existing network connectivity solution to ensure that the solution is highly available, fault tolerant, and secure.
Which solution win meet these requirements MOST cost-effectively?
Answer: D
Explanation:
To enhance the network connectivity solution's availability, fault tolerance, and security in a cost-effective manner, adding a dynamic private IP AWS Site-to-Site VPN as a secondary path is a viable option. This VPN serves as a resilient backup for the Direct Connect connection, ensuring continuous data flow even if the primary path fails. Implementing MACsec (Media Access Control Security) on the Direct Connect connection further secures the data in transit by providing encryption, thus addressing the security requirement. This solution strikes a balance between cost and operational efficiency, avoiding the higher expenses associated with provisioning an additional Direct Connect connection.
References: AWS Documentation on AWS Direct Connect and AWS Site-to-Site VPN provides insights into setting up resilient and secure network connections. Additionally, information on MACsec offers guidance on how to implement encryption for Direct Connect connections, aligning with best practices for secure and highly available network architectures.
NEW QUESTION # 470
A company is hosting a critical application on a single Amazon EC2 instance. The application uses an Amazon ElastiCache for Redis single-node cluster for an in-memory data store. The application uses an Amazon RDS for MariaDB DB instance for a relational database. For the application to function, each piece of the infrastructure must be healthy and must be in an active state.
A solutions architect needs to improve the application's architecture so that the infrastructure can automatically recover from failure with the least possible downtime.
Which combination of steps will meet these requirements? (Select THREE.)
Answer: A,B,D
Explanation:
* Option A is correct because using an Elastic Load Balancer and an Auto Scaling group with a minimum capacity of two instances can improve the availability and scalability of the EC2 instances that host the application. The load balancer can distribute traffic across multiple instances and the Auto Scaling group can replace any unhealthy instances automatically1
* Option D is correct because modifying the DB instance to create a Multi-AZ deployment that extends across two Availability Zones can improve the availability and durability of the RDS for MariaDB database. Multi-AZ deployments provide enhanceddata protection and minimize downtime by automatically failing over to astandby replica in another Availability Zone in case of a planned or unplanned outage4
* Option F is correct because creating a replication group for the ElastiCache for Redis cluster and enabling Multi-AZ on the cluster can improve the availability and fault tolerance of the in-memory data store. A replication group consists of a primary node and up to five read-only replica nodes that are synchronized with the primary node using asynchronous replication. Multi-AZ allows automatic failover to one of the replicas if the primary node fails or becomes unreachable6 References: 1: https://docs.aws.amazon.com/elasticloadbalancing/latest/userguide/how-elastic-load-balancing- works.html 2: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/burstable-performance-instances- unlimited-mode.html 3: https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_ReadRepl.
html 4: https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Concepts.MultiAZ.html 5: https://docs.
aws.amazon.com/AmazonElastiCache/latest/red-ug/AutoScaling.html 6: https://docs.aws.amazon.com
/AmazonElastiCache/latest/red-ug/Replication.Redis.Groups.html
NEW QUESTION # 471
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?
Answer: B
Explanation:
https://aws.amazon.com/aws-transfer-family/faqs/
NEW QUESTION # 472
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