Your team has a tomcat-based Java application you need to deploy into development, test
and production environments. After some research, you opt to use Elastic Beanstalk due to its
tight integration with your developer tools and RDS due to its ease of management. Your QA
team lead points out that you need to roll a sanitized set of production data into your

environment on a nightly basis. Similarly, other software teams in your org want access to
that same restored data via their EC2 instances in your VPC .The optimal setup for
persistence and security that meets the above requirements would be the following.

You are developing a new mobile application and are considering storing user preferences in
AWS.2w This would provide a more uniform cross-device experience to users using multiple
mobile devices to access the application. The preference data for each user is estimated to
be 50KB in size Additionally 5 million customers are expected to use the application on a
regular basis. The solution needs to be cost-effective, highly available, scalable and secure,
how would you design a solution to meet the above requirements?

A company is building a voting system for a popular TV show, viewers win watch the
performances then visit the show’s website to vote for their favorite performer. It is expected
that in a short period of time after the show has finished the site will receive millions of
visitors. The visitors will first login to the site using their Amazon.com credentials and then
submit their vote. After the voting is completed the page will display the vote totals. The
company needs to build the site such that can handle the rapid influx of traffic while
maintaining good performance but also wants to keep costs to a minimum. Which of the
design patterns below should they use?

A large real-estate brokerage is exploring the option o( adding a cost-effective location based
alert to their existing mobile application The application backend infrastructure currently runs
on AWS Users who opt in to this service will receive alerts on their mobile device regarding
real-estate otters in proximity to their location. For the alerts to be relevant delivery time
needs to be in the low minute count the existing mobile app has 5 million users across the us
Which one of the following architectural suggestions would you make to the customer?

You need a persistent and durable storage to trace call activity of an IVR (Interactive Voice
Response) system. Call duration is mostly in the 2-3 minutes timeframe. Each traced call can
be either active or terminated. An external application needs to know each minute the list of

currently active calls, which are usually a few calls/second. Put once per month there is a
periodic peak up to 1000 calls/second for a few hours. The system is open 24/7 and any
downtime should be avoided. Historical data is periodically archived to files. Cost saving is a
priority for this project. What database implementation would better fit this scenario, keeping
costs as low as possible?

Your company is in the process of developing a next generation pet collar that collects
biometric information to assist families with promoting healthy lifestyles for their pets Each
collar will push 30kb of biometric data In JSON format every 2 seconds to a collection
platform that will process and analyze the data providing health trending information back to
the pet owners and veterinarians via a web portal Management has tasked you to architect
the collection platform ensuring the following requirements are met.
Provide the ability for real-time analytics of the inbound biometric data Ensure processing of
the biometric data is highly durable. Elastic and parallel The results of the analytic processing
should be persisted for data mining Which architecture outlined below win meet the initial
requirements for the collection platform?

You have recently joined a startup company building sensors to measure street noise and air
quality in urban areas. The company has been running a pilot deployment of around 100
sensors for 3 months each sensor uploads 1KB of sensor data every minute to a backend
hosted on AWS. During the pilot, you measured a peak or 10 IOPS on the database, and you
stored an average of 3GB of sensor data per month in the database.
The current deployment consists of a load-balanced auto scaled Ingestion layer using EC2
instances and a PostgreSQL RDS database with 500GB standard storage.
The pilot is considered a success and your CEO has managed to get the attention or some
potential investors. The business plan requires a deployment of at least 1O0K sensors which
needs to be supported by the backend. You also need to store sensor data for at least two
years to be able to compare year over year Improvements.
To secure funding, you have to make sure that the platform meets these requirements and
leaves room for further scaling. Which setup win meet the requirements?

You have launched an EC2 instance with four (4) 500 GB EBS Provisioned IOPS volumes
attached The EC2 Instance Is EBS-Optimized and supports 500 Mbps throughput between
EC2 and EBS The two EBS volumes are configured as a single RAID o device, and each
Provisioned IOPS volume is provisioned with 4.000 IOPS (4 000 16KB reads or writes) for a

total of 16.000 random IOPS on the instance The EC2 Instance initially delivers the expected
16 000 IOPS random read and write performance Sometime later in order to increase the
total random I/O performance of the instance, you add an additional two 500 GB EBS
Provisioned IOPS volumes to the RAID Each volume Is provisioned to 4.000 IOPs like the
original four for a total of 24.000 IOPS on the EC2 instance Monitoring shows that the EC2
instance CPU utilization increased from 50% to 70%. but the total random IOPS measured at
the instance level does not increase at all.
What is the problem and a valid solution?

Your company plans to host a large donation website on Amazon Web Services (AWS). You
anticipate a large and undetermined amount of traffic that will create many database writes.
To be certain that you do not drop any writes to a database hosted on AWS. Which service
should you use?

Company B is launching a new game app for mobile devices. Users will log into the game
using their existing social media account to streamline data capture. Company B would like to
directly save player data and scoring information from the mobile app to a DynamoDS table
named Score Data When a user saves their game the progress data will be stored to the
Game state S3 bucket. What is the best approach for storing data to DynamoDB and S3?