###BeginCaseStudy###
Testlet 1
Background
Contoso, Ltd. is developing a patient monitoring solution for a hospital. The solution consists of an Azure
website and a set of mobile applications that health care providers use to monitor patients remotely.
Monitoring devices that run the embedded version of Windows will be attached to patients. The devices will
collect information from patients and will transmit real-time continuous data to a service that runs on Azure. The
service collects and distributes data. The data that the service provides must be accessible by the website and
by the mobile applications.
Business Requirements
Patients
All patient data must be stored securely on Azure. Data security must meet or exceed Health Insurance
Portability and Accountability Act of 1996 (HIPAA) standards in the United States and must meet or exceed
ISO/ICE 27002 data security standards in the rest of the world.
Contractors
Third-party contractors will develop the mobile applications. All contractors must develop the applications by
using virtual machines (VMs) that are hosted on Azure. Only authorized contractors and authorized IP
addresses are permitted to access the VMs. The contractors can use Near Field Communication (NFC) tags to
launch Remote Desktop (RD) connections to the VMs from NFC-enabled devices. For testing purposes,
contractors must be able to run multiple instances of mobile applications within the VMs.
Data Collection and Distribution Service
The service must monitor the patient data and send out alerts to health care providers when specific conditions
are detected. The service must send the alerts to mobile applications and to the website in real time so that
doctors, nurses, and caregivers can attend to the patient. Partner organizations and diagnostic laboratories
must be able to securely access the data and the website from remote locations.
Current Issues
A partner that is testing a prototype of the website reports that after signing in to the website, the partner is
redirected to the settings page instead of to the home page.
The data from the patient devices is slow to appear on the website and does not always appear. All patient
devices online have active connections to the data collection service.
Technical Requirements
Contractors
All contractors will use virtual machines that are initially configured as size A3. Contractors must sign in to the
assigned VM by using IP addresses from a list of preapproved addresses.
Data Collection and Distribution Service
The service runs Node.js in a worker role.
The service must use at least 2048-bit encryption and must use port 8888.
All patient information must be encrypted and stored by using a NoSQL data store.
Data must be stored and retrieved securely by using RESTful endpoints.
Data must NOT be stored within a virtual machine.
All deployed services must send an alert email to [email protected] when any of the following
conditions is met:
The CPU Percentage metric is at or above 85 percent for at least 10 minutes.
The Network In metric is at or above 2 KB for at least 10 minutes.
The Network Out metric is at or above 2 KB for at least 10 minutes.
The Disk Write metric is at or above 1 KB/sec for at least 30 minutes.
The Disk Read metric is at or above 1 KB/sec for at least 30 minutes.
Website and Mobile Devices
The website must be secure and must be accessible only within the hospital’s physical grounds. All mobileapplications and websites must be responsive. All websites must produce error logs that can be viewed
remotely.
Virtual Machines
All Azure instances must be deployed and tested on staging instances before they are deployed to
production instances.
All deployed instances must scale up to the next available CPU instance at a CPU usage threshold of 90
percent and scale down when the usage is below 10 percent.
Application Structure
Relevant portions of the application files are shown in the following code segments. Line numbers in the code
segments are included for reference only and include a two-character prefix that denotes the specific file to
which they belong.
###EndCaseStudy###
You need to implement data storage for patient information.
What should you do?
A.
Use the Update Entity operation of the Table Service REST API.
B.
Use the Put Blob operation of the Blob Service REST API.
C.
Use the Put Message operation of the Create Queue REST API.
D.
Use the Set Share Metadata operation of the File Service REST API.