A company wants to move a web application to AWS. The application stores session information locally on each web server, which will make auto scaling difficult.
As part of the migration, the application will be rewritten to decouple the session data from the web servers. The company requires low latency, scalability, and availability.
Which service will meet the requirements for storing the session information in the MOST cost-effective way?
D
Reference:
https://aws.amazon.com/caching/session-management/
https://aws.amazon.com/elasticache/redis-vs-memcached/
A company has an Amazon EC2 deployment that has the following architecture:
✑ An application tier that contains 8 m4.xlarge instances
✑ A Classic Load Balancer
✑ Amazon S3 as a persistent data store
After one of the EC2 instances fails, users report very slow processing of their requests. A Solutions Architect must recommend design changes to maximize system reliability. The solution must minimize costs.
What should the Solutions Architect recommend?
B
By default, connection draining is enabled for Application Load Balancers but must be enabled for Classic Load Balancers. When Connection Draining is enabled and configured, the process of deregistering an instance from an Elastic Load Balancer gains an additional step. For the duration of the configured timeout, the load balancer will allow existing, in-flight requests made to an instance to complete, but it will not send any new requests to the instance. During this time, the API will report the status of the instance as InService, along with a message stating that ג€Instance deregistration currently in progress.ג€ Once the timeout is reached, any remaining connections will be forcibly closed.
Reference:
https://docs.aws.amazon.com/autoscaling/ec2/userguide/attach-load-balancer-asg.html https://aws.amazon.com/blogs/aws/elb-connection-draining-remove-instances-from-service-with-care/
An on-premises application will be migrated to the cloud. The application consists of a single Elasticsearch virtual machine with data source feeds from local systems that will not be migrated, and a Java web application on Apache Tomcat running on three virtual machines. The Elasticsearch server currently uses 1 TB of storage out of 16 TB available storage, and the web application is updated every 4 months. Multiple users access the web application from the Internet. There is a 10Gbit AWS Direct Connect connection established, and the application can be migrated over a scheduled 48-hour change window.
Which strategy will have the LEAST impact on the Operations staff after the migration?
B
A company's application is increasingly popular and experiencing latency because of high volume reads on the database server.
The service has the following properties:
✑ A highly available REST API hosted in one region using Application Load Balancer (ALB) with auto scaling.
✑ A MySQL database hosted on an Amazon EC2 instance in a single Availability Zone.
The company wants to reduce latency, increase in-region database read performance, and have multi-region disaster recovery capabilities that can perform a live recovery automatically without any data or performance loss (HA/DR).
Which deployment strategy will meet these requirements?
A
A company runs a three-tier application in AWS. Users report that the application performance can vary greatly depending on the time of day and functionality being accessed.
The application includes the following components:
✑ Eight t2.large front-end web servers that serve static content and proxy dynamic content from the application tier.
✑ Four t2.large application servers.
✑ One db.m4.large Amazon RDS MySQL Multi-AZ DB instance.
Operations has determined that the web and application tiers are network constrained.
Which of the following is a cost effective way to improve application performance? (Choose two.)
BD
Reference:
https://aws.amazon.com/ec2/instance-types/
An online retailer needs to regularly process large product catalogs, which are handled in batches. These are sent out to be processed by people using the
Amazon Mechanical Turk service, but the retailer has asked its Solutions Architect to design a workflow orchestration system that allows it to handle multiple concurrent Mechanical Turk operations, deal with the result assessment process, and reprocess failures.
Which of the following options gives the retailer the ability to interrogate the state of every workflow with the LEAST amount of implementation effort?
A
An organization has two Amazon EC2 instances:
✑ The first is running an ordering application and an inventory application.
The second is running a queuing system.
During certain times of the year, several thousand orders are placed per second. Some orders were lost when the queuing system was down. Also, the organization's inventory application has the incorrect quantity of products because some orders were processed twice.
What should be done to ensure that the applications can handle the increasing number of orders?
C
Reference:
https://docs.aws.amazon.com/AWSSimpleQueueService/latest/SQSDeveloperGuide/standard-queues.html
A company is migrating its on-premises build artifact server to an AWS solution. The current system consists of an Apache HTTP server that serves artifacts to clients on the local network, restricted by the perimeter firewall. The artifact consumers are largely build automation scripts that download artifacts via anonymous
HTTP, which the company will be unable to modify within its migration timetable.
The company decides to move the solution to Amazon S3 static website hosting. The artifact consumers will be migrated to Amazon EC2 instances located within both public and private subnets in a virtual private cloud (VPC).
Which solution will permit the artifact consumers to download artifacts without modifying the existing automation scripts?
B
A group of research institutions and hospitals are in a partnership to study 2 PBs of genomic data. The institute that owns the data stores it in an Amazon S3 bucket and updates it regularly. The institute would like to give all of the organizations in the partnership read access to the data. All members of the partnership are extremely cost-conscious, and the institute that owns the account with the S3 bucket is concerned about covering the costs for requests and data transfers from Amazon S3.
Which solution allows for secure datasharing without causing the institute that owns the bucket to assume all the costs for S3 requests and data transfers?
A
A company currently uses a single 1 Gbps AWS Direct Connect connection to establish connectivity between an AWS Region and its data center. The company has five Amazon VPCs, all of which are connected to the data center using the same Direct Connect connection. The Network team is worried about the single point of failure and is interested in improving the redundancy of the connections to AWS while keeping costs to a minimum.
Which solution would improve the redundancy of the connection to AWS while meeting the cost requirements?
B
