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AZ-900 uCertify > 2.2 Core resources available in Azure > Flashcards

2.2 Core resources available in Azure Flashcards

1
Q

What are the steps to create an Azure VM?

A 
Click CREATE A RESOURCE
Click COMPUTE
Click SEE ALL LINK
Click a desired VM
Click CREATE
Click CREATE NEW next to RESSOURCE GROUP to create a resource group
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2
Q

Is Azure VM an IaaS?

A

Yes

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3
Q

What is PLANNED MAINTENANCE?

A

planned updates that Microsoft makes to host computers.

Includes: OS update, driver updates, ect.

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4
Q

What are AVAILABILITY SETS?

A

Availability sets protect your VMs from maintenance events and downtime caused by hardware failures.

For full protection, you must deploy at least two VMs in an availability set.

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5
Q

What is a FAULT DOMAIN?

A

A logical representation of the physical rack in which a host computer is installed (the host of a VM).

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6
Q

How many FAULT DOMAINS does Azure assign my default?

A

Two fault domains are assigned by default to an availability set. This ensure fault tolerance when one fault domain (computer) goes down.

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7
Q

What is an UPDATE DOMAIN?

A

Update domains are designed to protect you from situations where the host computer is being rebooted.

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8
Q

How many update domains does Azure create by default for an availability set?

A

Five update domains are created by default.

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9
Q

What in particular do update domains protect you from?

A

Update domains protect you from downtime associated with planned maintenance events.

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10
Q

What is a FRONT END?

A

The front end is a special VM running software that allows it to distribute traffic to VMs that are actually running your web app.

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11
Q

What is an App Service plan?

A

An App Service plan is created within a specific Azure region. It specifies how many VMs an app runs on.

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12
Q

Are you charged for an App Service Plan even when no web apps are running?

A

Yes. You are still charged even with the web apps not running. You must delete the web app to avoid being charged.

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13
Q

How many VMs do the following tiers allow you to scale out to?

Basic Tier
Standard Tier
Premium Tier
PremiumV2 tier

A

Basic tier is 3 VMs
Standard tier is 10 VMs
Premium and PremiumV2 is up to 20 VMs

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14
Q

What service model are Web Apps?

A

PaaS

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15
Q

What are Azure Container Instances (ACI)?

A

ACI is a PaaS service that offers the ability to run containerized applications easily.

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16
Q

What is a CONTAINER?

A

It is a zipped version of an image. It includes everything an application needs to run (ex a database engine, a web server, ect).

Containers typically operate within an isolated environment with its own network, storage, ect.

Containers running on the same machine cannot access data and systems used by another container.

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17
Q

What does a computer need to run an application in a container?

A

A computer needs to have a container runtime installed IOT run an application in a container.

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18
Q

What is a Docker?

A

A Docker is used to run applications using containers.

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19
Q

Are containers a good choice to run applications that get heavy use from many people?

A

No. Azure Kubernetes Service (AKS) would be a better solution.

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20
Q

Can you change the DNS Name Label after creating an instance for a container?

A

No you cannot.

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21
Q

What is Kubernetes?

A

Kubernetes is a container orchestration service. It monitors containers and ensures they are always running. It can scall containers when needed.

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22
Q

What is a POD that is created by Kubernetes?

A

A pod is a group of related containers that share resources.

This allows you to get away from resource sharing restrictions that occur in multi-container environments.

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23
Q

Can containers in one POD share resources with a container in another POD?

A

No

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24
Q

What is a computer that Kubernetes pods runs on called?

A

A node or worker.

This computer must have a container runtime (Docker) running on it.

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25
Q

What is a Kubernetes master?

A

A master node that controls multiple nodes within a Kubernetes instance.

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26
Q

What is a Kubernetes cluster?

A

The entire environment that includes the Kubernetes master and all of its nodes.

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27
Q

How does Azure Kubernetes Service (AKS) relieve the burden of dealing with the Kubernetes master?

A

AKS creates the master and the nodes for you. and simplifies the management of the cluster.

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28
Q

What is Windows Virtual Desktop (WVD)?

A

It is a PaaS in Azure and provides desktop virtualization that’s managed by Microsoft.

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29
Q

What is a tenant in Windows Virtual Desktop?

A

A tenant is a collection of one or more “host pools”. Host pools consist of session hosts and one or more app groups that represent the applications and OS that users are able to access.

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30
Q

What is an Azure virtual network (VNet)?

A

A VNet allows Azure services to communicate with each other and the internet.

Can be used to facilitate communications between on-premises resources and Azure resources.

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31
Q

Does Azure automatically create a VNet when you create a VM?

A

Yes

32
Q

Can you you connect a VM to a VNet after it has been created?

A

No. So if you want to use your own VNet, create it before creating a VM in Azure.

33
Q

What does Azure App Service provide that allows you to integrate a web app in the App Service with an existing VNet?

A

Azure VNet Integration

34
Q

What is Azure Network Security Groups?

A

A feature that allows you to enforce rules about what kind of traffic allowed on a VNet.

35
Q

What does Azure VPN Gateway do?

A

It allows you to securely connect one VNet to another within Azure. It also enables connecting a VNet to on-premises resources.

36
Q

What protocol does VPN Gateway use to secure connections?

A

Internet protocol security (IPSec) and Internet key exchange (IKE)

37
Q

What three connection types are supported by VPN Gateway?

A

VNet to VNet, site to site, and point to site

38
Q

What is virtual network peering and what is it’s benefits?

A

Virtual network peering sends traffic between two VNets over Microsoft’s private backbone infrastructure and not over the internet (thus reducing latency). However, the traffic is not encrypted.

39
Q

What is global virtual network peering?

A

The peering of two VNets in different Azure regions.

40
Q

What network speed is a VPN limited to within Azure?

A

1.25 Gbps

41
Q

What is Azure ExpressRoute?

A

A services that offers speeds up to 10 Gbps over fiber optic connections. ExpressRoute connects to Microsoft Enterprise Edge (MSEE) router which then connects to Azure.

42
Q

What is an ExpressRoute also called?

A

A circuit

43
Q

Why is bandwidth in ExpressRoute more reliable? What is a potential downside to this?

A

Bandwidth is much more reliable because it does not traverse the public internet. However, it requires you to trust the service provider with data flowing through the circuit.

44
Q

What is ExpressRoute Direct?

A

It allows you to connect directly to a physical port on the MSEE router. It removes the service provider from enabling bandwidth to connect with the MSEE router. It also provides higher bandwidth.

45
Q

What is Azure Blob Storage?

A

It is used to store unstructured data to include text files, images, videos, documents, ect.

46
Q

How many types of blob storage are available in Azure?

A

Three

47
Q

What are the three types of blob storage in Azure Blob storage?

A

Block Blobs
Append Blobs
Page Blobs

48
Q

What are block blobs used for?

A

To store files used by an application.

49
Q

What is an Append blob used for?

A

Similar to block blobs but are specialized for append operations.

OFTEN USED TO STOR CONSTANTLY UPDATED DATA LIKE DIAGNOSTIC LOGS.

50
Q

What are page blobs used for?

A

They are used to store virtual hard disk files (.vhd) that are used in Azure VMs.

51
Q

How are blobs stored?

A

Blobs are stored in CONTAINERS.

Containers are a means of organizing blobs.

52
Q

What is AZURE STORAGE EXPLORER?

A

A free tool from Microsoft to upload data from on-premises to Azure.

53
Q

What is Azure Data Box?

A

a service for moving data from on-premises to Azure Storage.

54
Q

What is Data Box Edge?

A

an online service that enables you to copy data to Azure Storage. Makes it as easy as copying data to a harddrive.

55
Q

What is Data Box Heavy?

A

Microsoft ships you a device on wheels. You can upload up to 1 petabyte of data, encrypt it with BitLocker, and ship it back to Microsoft to upload to Azure.

56
Q

What happens to data stored on VM disks in the event of maintenance activities?

A

The data will be lost.

57
Q

What solution does Azure provide if you need to store data for periods of time and protect data between periods of maintenance and VM downtime?

A

Azure offers disks in HDD and SSD format. These disks enable data persistence in the event of maintenance activities.

58
Q

What two formats are Azure disks available?

A

They are available as managed and unmanaged disks.

Managed disks are managed by Microsoft. Unmanaged disks are managed by you.

59
Q

What is an important reason to use managed disks?

A

Using managed disks enables you to avoid having a single point of failure in your VMs.

60
Q

What is Azure Files?

A

A completely managed file share that you can mount just like any SMB file share.

61
Q

Can you use Windows 7 or Windows Server 2008 to mount Azure Files share on-premises?

A

No because those two options use SMB 2.1

62
Q

What port does Azure Files use?

A

Azure Files uses port 445 for the SMB protocol

63
Q

What problem does Azure File Sync solve?

A

Users that experience longer transfer times due to the regular access and storage of data in Azure Files.

64
Q

What is the “Hot storage tier”?

A

It is a tier of storage for data that you regular access. Higher cost of storage but lower cost for accessing data.

65
Q

What is the “Cool storage tier”?

A

This tier is for data that you intend to store for longer periods of time and access infrequently. Data must be kept in storage for a minimum of 30 days.

66
Q

What is the Archieve storage tier?

A

Is a storage tier for long term data storage. High cost to access data. Guarenteed access to first byte of data within 15 hours.

67
Q

What is Cosmos DB?

A

A NoSQL database system in Azure. It has custom code included that makes it easier for existing applications to begin integrating with it.

68
Q

What are the five types of APIs that are included with Cosmos DB?

A

Core(SQL): creates document databases that can be queried using SQL syntax from relational databases

Azure Cosmos DB for MongoDB API: for migrating MongoDB to Cosmos DB.

Cassandra: Used for migrating Cassandra DBs to Cosmos. Cassandra DB are column databases.

Azure Table: for migrating data stored in Azure Table Storage to Cosmos DB. Creates a key-value database.

Gremlin: used for migrating Gremlin DBs to Cosmos. Gremlin are graph databases.

69
Q

What is turnkey global distribution?

A

Cosmos DB feature that allows you to replicate DB data globally.

70
Q

What is Azure SQL Database?

A

A PaaS for SQL Server database hosting. Microsoft manages the platform. You manage all the data.

71
Q

What type of Database does SQL Server offer?

A

Relational databases

72
Q

What two purchase models are available for single databases through Azure?

A

Database Transaction unit (DTU): a collection of CPU, memory, and data reads and writes. 3 tiers: Basic, standard, premium.

Virtual Core (vCore): uses virtual CPU that enables you to configure the hardware needed. Four tiers: General-Purpose and Business-Critical, provisioned tier, and serverless tier.

73
Q

Do relational databases allow you to scale out (horizontally)?

A

No

74
Q

What is the Azure Database Migration Service (DMS)?

A

Simplifies moving on-premises databases or databases hosted elsewhere in the cloud into a managed instance.

75
Q

What is MySQL?

A

One of the most popular open-source databases in the world.

76
Q

What is Azure Database for MySQL?

A

A fully managed cloud offering of the Community Edition of MySQL.

77
Q

In the Azure Marketplace what must you remember about the templates available?

A

All templates in the Azure Marketplace are ARM (Azure Resource Manager) templates.

AZ-900 uCertify (5 decks)

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