You would like to create a mirror image of your production environment in another region for disaster recovery
purposes. Which of the following AWS resources do not need to be recreated in the second region? Choose 2
answers.

Your company runs a customer facing event registration site This site is built with a 3-tier architecture with web
and application tier servers and a MySQL database The application requires 6 web tier servers and 6
application tier servers for normal operation, but can run on a minimum of 65% server capacity and a single
MySQL database. When deploying this application in a region with three availability zones (AZs) which
architecture provides high availability?

Your application is using an ELB in front of an Auto Scaling group of web/application servers deployed across
two AZs and a Multi-AZ RDS Instance for data persistence. The database CPU is often above 80% usage and
90% of I/O operations on the database are reads. To improve performance you recently added a single-node
Memcached ElastiCache Cluster to cache frequent DB query results. In the next weeks the overall workload is
expected to grow by 30%. Do you need to change anything in the architecture to maintain the high availability or
the application with the anticipated additional load’* Why?

You are responsible for a legacy web application whose server environment is approaching end of life You
would like to migrate this application to AWS as quickly as possible, since the application environment currently
has the following limitations:
– The VM’s single 10GB VMDK is almost full.
– Me virtual network interface still uses the 10Mbps driver, which leaves your 100Mbps WAN connection
completely underutilized.
– It is currently running on a highly customized. Windows VM within a VMware environment.
– You do not have me installation media.
This is a mission critical application with an RTO (Recovery Time Objective) of 8 hours. RPO (Recovery Point
Objective) of 1 hour. How could you best migrate this application to AWS while meeting your business
continuity requirements?

An International company has deployed a multi-tier web application that relies on DynamoDB in a single region
For regulatory reasons they need disaster recovery capability In a separate region with a Recovery Time
Objective of 2 hours and a Recovery Point Objective of 24 hours They should synchronize their data on a
regular basis and be able to provision me web application rapidly using CloudFormation. The objective is to
minimize changes to the existing web application, control the throughput of DynamoDB used for the
synchronization of data and synchronize only the modified elements.
Which design would you choose to meet these requirements?

Refer to the architecture diagram above of a batch processing solution using Simple Queue Service (SOS) to
set up a message queue between EC2 instances which are used as batch processors Cloud Watch monitors
the number of Job requests (queued messages) and an Auto Scaling group adds or deletes batch servers
automatically based on parameters set in Cloud Watch alarms. You can use this architecture to implement
which of the following features in a cost effective and efficient manner?

Your company currently has a 2-tier web application running in an on-premises data center. You have
experienced several infrastructure failures in the past two months resulting in significant financial losses. Your
CIO is strongly agreeing to move the application to AWS. While working on achieving buy-in from the other
company executives, he asks you to develop a disaster recovery plan to help improve Business continuity in the
short term. He specifies a target Recovery Time Objective (RTO) of 4 hours and a Recovery Point Objective
(RPO) of 1 hour or less. He also asks you to implement the solution within 2 weeks. Your database is 200GB in
size and you have a 20Mbps Internet connection. How would you do this while minimizing costs?

An ERP application is deployed across multiple AZs in a single region. In the event of failure, the Recovery
Time Objective (RTO) must be less than 3 hours, and the Recovery Point Objective (RPO) must be 15 minutes
the customer realizes that data corruption occurred roughly 1.5 hours ago. What DR strategy could be used to
achieve this RTO and RPO in the event of this kind of failure?

Your startup wants to implement an order fulfillment process for selling a personalized gadget that needs an
average of 3-4 days to produce with some orders taking up to 6 months you expect 10 orders per day on yourfirst day. 1000 orders per day after 6 months and 10,000 orders after 12 months. Orders coming in are checked
for consistency men dispatched to your manufacturing plant for production quality control packaging shipment
and payment processing If the product does not meet the quality standards at any stage of the process
employees may force the process to repeat a step Customers are notified via email about order status and any
critical issues with their orders such as payment failure. Your case architecture includes AWS Elastic Beanstalk
for your website with an RDS MySQL instance for customer data and orders. How can you implement the order
fulfillment process while making sure that the emails are delivered reliably?

You have deployed a web application targeting a global audience across multiple AWS Regions under the
domain name.example.com. You decide to use Route53 Latency-Based Routing to serve web requests to
users from the region closest to the user. To provide business continuity in the event of server downtime you
configure weighted record sets associated with two web servers in separate Availability Zones per region.
Dunning a DR test you notice that when you disable all web servers in one of the regions Route53 does not
automatically direct all users to the other region. What could be happening? Choose 2 answers.