###BeginCaseStudy###
Case Study: 2
Contoso, Ltd
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 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.
###EndCaseStudy###
The website does not receive alerts quickly enough.
You need to resolve the issue.
What should you do?
A.
Enable automatic scaling for the website.
B.
Manually Increase the instance count for the worker role.
C.
Increase the amount of swap memory for the VM instance.
D.
Set the monitoring level to Verbose for the worker role.
E.
Enable automatic scaling for the worker role.
why not E???
I Agree E sounds better. The Service is a Worker Role. So the Service is having trouble sending alert to Web Site.
I presume the Alert is probably a webSocket message sent from Node.Js application.
The webSite running on the browser would receive the websocket message directly from Worker Role. No need to scale up the WebSite Tier.
The answer is A because the “web site does not receive alerts quickly enough.”
Also, the alerts are not originating from the worker roles because, “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.”
This means that the web roles are becoming overloaded. Scaling up the worker roles would have no effect since the data is entering through the web role.
The answer is ‘B’. You can’t wait for the auto-scaling to kick in.
Hm, no. Now I think the answer should be “A”, because in the question the complaint is specifically about the website and it does not mention the rest of the devices. Hence – the worker role (Service) is working fine, it is the website which can’t keep up.
I think the web role does not receive alerts because the worker role is throttling. In addition to this, autoscaling has no immediate effect. For this reason I think the best solution is B.
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New 70-532 Exam Questions Updated Recently (15/Aug/2017):
NEW QUESTION 174
Which of the following is not true about metadata? (Choose two.)
A. Both containers and blobs have writable system properties.
B. Blob user-defined metadata is accessed as a key value pair.
C. System metadata can influence how the blog is stored and accessed in Azure Storage.
D. Only blobs have metadata; containers do not.
Answer: AD
NEW QUESTION 175
Which of the following are true regarding supported operations granted with an SAS token? (Choose three.)
A. You can grant read access to existing blobs.
B. You can create new blob containers.
C. You can add, update, and delete queue messages.
D. You can add, update, and delete table entities.
E. You can query table entities.
Answer: ACDE
NEW QUESTION 176
You administer an Azure subscription for your company. You have an application that updates text files frequently. The text files will not exceed 20 gigabytes (GB) in size. Each write operation must not exceed 4 megabytes (MB). You need to allocate storage in Azure for the application. Which three storage types will achieve the goal? (Each correct answer presents a complete solution. Choose three.)
A. page blob
B. queue
C. append blob
D. block blob
E. file share
Answer: ACD
NEW QUESTION 177
You administer an Access Control Service namespace named ContosoACS that is used by a web application. ContosoACS currently utilizes Microsoft and Yahoo accounts. Several users in your organization have Google accounts and would like to access the web application through ContosoACS. You need to allow users to access the application by using their Google accounts. What should you do?
A. Register the application directly with Google.
B. Edit the existing Microsoft Account identity provider and update the realm to include Google.
C. Add a new Google identity provider.
D. Add a new WS-Federation identity provider and configure the WS-Federation metadata to point to the Google sign-in URL.
Answer: C
Explanation:
Configuring Google as an identity provider eliminates the need to create and manage authentication and identity management mechanism. It helps the end user experience if there are familiar authentication procedures.
NEW QUESTION 178
Which of the following are valid options for processing queue messages? (Choose two.)
A. A single compute instance can process only one message at a time.
B. A single compute instance can process up to 31 messages at a time.
C. A single compute instance can retrieve up to 32 messages at a time.
D. Messages can be read one at a time or in batches of up to 32 messages at a time.
E. Messages are deleted as soon as they are read.
Answer: CD
NEW QUESTION 179
Which of the following statements are true of stored access policies? (Choose two.)
A. You can modify the start or expiration date for access.
B. You can revoke access at any point in time.
C. You can modify permissions to remove or add supported operations.
D. You can add to the list of resources accessible by an SAS token.
Answer: ABC
NEW QUESTION 180
How should you choose a good partition key for a Table storage implementation? (Choose two.)
A. They should always be unique, like a primary key in a SQL table.
B. You should always use the same partition key for all records.
C. Think about how you’re likely to update the data using batch transactions.
D. Find an even way to split them so that you have relatively even partition sizes.
Answer: CD
NEW QUESTION 181
Which of the following is not a method for replicating a Table storage account?
A. Transactional replication
B. Zone redundant storage
C. Read access geo-redundant storage
D. Geo-redundant storage
Answer: A
NEW QUESTION 182
You manage an on-premises monitoring platform. You plan to deploy virtual machines (VMs) in Azure. You must use existing on-premises monitoring solutions for Azure VMs. You must maximize security for any communication between Azure and the on-premises environment. You need to ensure that Azure alerts are sent to the on-premises solution. What should you do?
A. Enable App Service Authentication for the VMs.
B. Configure a basic authorization webhook.
C. Deploy an HDInsight cluster.
D. Configure a token-based authorization webhook.
Answer: D
NEW QUESTION 183
A company Chef Information Officer (CIO) who wants to ensure rapid elasticity for the company’s cloud solution would MOST likely choose which of the following types of cloud?
A. Public cloud
B. Private community cloud
C. Private cloud
D. Community cloud
Answer: C
Explanation:
Rapid elasticity is a cloud computing term for scalable provisioning, or the ability to provide scalable services. Software that can scale in a private cloud faces two security related issues:
– Although the private cloud infrastructure can enable rapid elasticity in the supply of virtual resources, hosted applications and services must be designed correctly if they are to function securely when they are scaled out.
– Hosted applications and services that initiate scaling requests automatically based on monitored demand or a timetable must perform these operations without impacting their own or other services availability within the cloud.
NEW QUESTION 184
Which of the following statements are correct for submitting operations in a batch? (Choose three.)
A. All operations have to be in the same partition.
B. Total batch size can’t be greater than 4MB.
C. Max operation count is 100.
D. Minimum operation count is three.
Answer: ABC
NEW QUESTION 185
Which of the following statements are true of CORS support for storage? (Choose two.)
A. It is recommended you enable CORS so that browsers can access blobs.
B. To protect CORS access to blobs from the browser, you should generate SAS tokens to secure blob requests.
C. CORS is supported only for Blob storage.
D. CORS is disabled by default.
Answer: BD
NEW QUESTION 186
Which of the following is not a requirement for creating an online secondary for SQL Database?
A. The secondary database must have the same name as the primary.
B. They must be on separate servers.
C. They both must be on the different subscription.
D. The secondary server cannot be a lower performance tier than the primary.
Answer: D
NEW QUESTION 187
You have an existing classic virtual network. You need to export the virtual network settings to an XML file to make modifications. Which Azure PowerShell cmdlet should you use?
A. Get-AzureVNetSite
B. Get-AzureVNetConnection
C. Get-AzureVNetGateway
D. Get-AzureVNetConfig
Answer: D
NEW QUESTION 188
Which statement is true of Storage Analytics Metrics?
A. Capacity metrics are recorded only for blobs.
B. You can set hourly or by minute metrics through the management portal.
C. By default, metrics are retained for one year.
D. If you disable metrics, existing metrics are deleted from storage.
Answer: A
NEW QUESTION 189
Which metrics should you add to monitoring that will help you select the appropriate level of SQL Database? (Choose three.)
A. CPU Processor Count
B. CPU Percentage
C. Physical Data Reads Percentage
D. Log Writes Percentage
Answer: BCD
NEW QUESTION 190
You are migrating a local virtual machine (VM) to an Azure VM. You upload the virtual hard disk (VHD) file to Azure Blob storage as a Block Blob. You need to change the Block blob to a page blob. What should you do?
A. Delete the Block Blob and re-upload the VHD as a page blob.
B. Update the type of the blob programmatically by using the Azure Storage .NET SDK.
C. Update the metadata of the current blob and set the Blob-Type key to Page.
D. Create a new empty page blob and use the Azure Blob Copy Power Shell cmdlet to copy the current data to the new blob.
Answer: A
Explanation:
* To copy the data files to Windows Azure Storage by using one of the following methods: AzCopy Tool, Put Blob (REST API) and Put Page (REST API), or Windows Azure Storage Client Library for .NET or a third-party storage explorer tool. Important: When using this new enhancement, always make sure that you create a page blob not a block blob.
* Azure has two main files storage format:
– Page blob: mainly used for vhd’s (CloudPageBlob)
– Block Blob: for other files (CloudBlockBlob)
NEW QUESTION 191
……
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Answer is B.
https://docs.microsoft.com/en-us/azure/architecture/best-practices/auto-scaling
“However, keep in mind that autoscaling is not an instantaneous process. It takes time to react to a metric such as average CPU utilization exceeding (or falling below) a specified threshold.”