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 firstname.lastname@example.org 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 mobile applications 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.
You need to implement the worker role to support the real-time continuous data-collection service.
How should you complete the relevant code? To answer, select the appropriate option or options in the answer area.