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Az-900 > Microsoft Azure Fundamentals: Describe cloud concepts > Flashcards

Microsoft Azure Fundamentals: Describe cloud concepts Flashcards

1
Q

Define Disaster Recovery

A

Ability to recover major incidents. May require manual intervention.

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2
Q

Define Elasticity

A

The degree to which a system adapts to workload changes.
Sources are (de)provisioned automatically.

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3
Q

Define Scalability

A

Increase/decrease resources based on demand.

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4
Q

Give two examples of Hybrid Cloud Infastructure.

A

Private and Public Cloud
On Premises Infastructure and public cloud

Most commonly used.

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5
Q

You need to configure a virtual machines vertically.
What should you do ?

A

Add Compute and memory resources to each machine.

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6
Q

Best Solution for hardware running a customized database

A

IaaS

Custamizable key word

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7
Q

Best Solution for using a calendar to schedule meetings

A

SaaS

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8
Q

Best Solution for Business services analyzing marketing

A

PaaS

Platform to build

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9
Q

Demand on a server increases. You want to add a second a server to spread the load. This is known as…?

A

Horizontal Scaling

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10
Q

Which components are the responsibility of the user vs provider for PaaS

A

OS - Provider
Storage - Provider
Virtualization - Provider
Apps - User
Data - User

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11
Q

What cloud model requires infastructure to be on a private network

A

Private

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12
Q

You need to:
* Host web apps
* keep hardware and management to a minimum
* Be highly scalable.
What is the Appropriate Cloud model ?

A

Public Cloud Model

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13
Q

You need to maintain control over hardware and infastructure. Solution can be physically offsite.
What is the Appropriate Cloud model ?

A

Private Cloud Model

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14
Q

You need to use custom SaaS, minimize costs and keep data on site.
Appropriate Cloud model ?

A

Hybrid Cloud Model

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15
Q

What kind of service is a virtual machine

A

IaaS

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16
Q

Define Vertical Scaling

A

Scaling up by adding resources to increase the power of an existing resource. E.g. CPU and Memory.

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17
Q

Define Horizontal Scaling

A

Scaling across and increasing the amount of resources availible.

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18
Q

Define Cloud Agility

A

The ability to react quickly to allocate and de allocate cloud resources

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19
Q

Define fault tolerance

A

The property that enables a system to continue operating properly in the event of the failure. Backups!!

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20
Q

How is fault tolerance beneficial for customers ?

A

Backup components ensures customers aren’t affected when incidents happen

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21
Q

Define economies of scale

A

The ability to do things at a lower cost per unit on larger scales.

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22
Q

Define IaaS

A

Instant computing infrastructure over the internet. Basically renting servers, VMs, storage and networks

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23
Q

Define PaaS

A

PaaS provides a complete development and deployment environment int he cloud, i.e. building apps

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24
Q

Define SaaS

A

Software is hosted and managed for the customer

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25
Q

What are some potential downsides of Public cloud

A

Meeting security requirements
Meet compliance requirements
Lack of Hardware ownership therefore less management.

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26
Q

What do you call a snapshot of a running VM?

A

An image

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27
Q

What are the advantages of private cloud

A

Control over resources and security.
Can meet strict security, compliance and legal requirements.

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28
Q

Gives some common scenarios in which to use IaaS

A

Migrating workloads
Test and development
Website hosting
Storage, backup, and recovery

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29
Q

What is the http address of the global Azure portal

A

portal.azure.com

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30
Q

Define High Availability

A

The ability to keep cloud resources and services functioning for long periods of time

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31
Q

Which of the following is true when it comes to SaaS (Software as a service)?
You are responsible for scalability of the solution
You are responsible for the maintenance of the underlying hardware
You are responsible for configuring the solution
You are responsible for high availability of the solution

A

You are responsible for configuring the solution

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32
Q

You want to ensure that an application survives a region wide failure in Azure. Which of the following concept needs to be considered to fulfil this requirement?

Scalability 
Disaster Recovery 
Agility 
Elasticity
A

Disaster Recovery

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33
Q

Which of the following is a feature of the Azure SQL Data warehouse architecture?

High Availability 
Scalability 
Disaster Recovery 
Visualization
A

Scalability

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34
Q

A company is planning on creating several SQL Databases in Azure. They would be using the Azure SQL Database service. Which of the following is the right category to which the Azure SQL Database service belongs to?

Infrastructure as a service (IaaS) 
Platform as a service (PaaS)
Software as a service (SaaS)
Function as a service (FaaS)
A

PaaS

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35
Q

A company is planning on using Azure Storage Accounts. They have the following requirement: Replication of data to another region.
Can the Azure storage account automatically replicate data to another region?

A

Azure geo-redundant storage (GRS) replicates data to a secondary region automatically.

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36
Q

A company is planning on hosting a set of resources in their Azure subscription. They are currently aware that most Azure Service can provide an SLA of 99.9%. Which of the following technique could be used to increase the uptime for resources hosted in Azure?

Adding resources to multiple regions 
Adding resources to the same data center 
Adding resources to the same resource group 
Adding resources to the same subscription
A

Adding resources to multiple regions

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37
Q

An application consists of a set of virtual machines hosted in a Virtual Network. In a month, the application seems to have a load of around 20% for 3 weeks. During the last week the load on the application reaches 80%. Which of the following concept would you implement to ensure that cost and efficiency of the underlying application infrastructure?

High availability 
Elasticity 
Disaster recovery 
Fault tolerance
A

Elasticity
Key word is efficiency

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38
Q

Under which of the following cloud computing models would the Azure “Content Delivery” service fall into?

Infrastructure as a service (IaaS) 
Platform as a service (PaaS) 
Software as a service (SaaS) 
Function as a service (FaaS)
A

PaaS
Delivering a platform.

39
Q

A company is planning on setting up a private cloud network. Which of the following is an advantage of setting up a private cloud network?

  • A Private Cloud environment can only support an Infrastructure as a service model.
  • A Private Cloud environment can only support a Platform as a service model.
  • The Private Cloud environment can be rolled out to the general public
  • The Private Cloud environment can be rolled out to select users
A

The Private Cloud environment can be rolled out to select users

40
Q

Your company is planning on using the Azure App Service (PaaS) to host their set of web applications. Does Azure provide you full control over the operating system that hosts the web applications?

A

No

41
Q

Your company is planning on using the Azure App Service (PaaS) to host their set of web applications. Does Azure provide the ability to scale the platform automatically?

A

Yes

42
Q

A company wants to migrate their current on-premise servers to Azure. They want to ensure that the servers are running even if a single Azure Data Center goes down. Which of the following terms refers to the solution that needs to be in place to fulfill this requirement?

Fault tolerance 
Elasticity 
Scalability
Low Latency
A

Fault tolerance

43
Q

A company wants to host an application on a set of Virtual Machines. The application must be made available 99.99 percent of the time. In order to comply with the SLA requirement, what is the minimum number of Virtual Machines that should be used to host the application?

1
2
3
4
A

2

44
Q

Which of the following terms refer to making a service available with no downtime for an extended period of time?

Agility 
Fault tolerance 
High availability
A

High availability

45
Q

Which cloud model provides the greatest degree of ownership and control?

Hybrid 
Private 
Public
A

Private

46
Q

Which cloud model provides the greatest degree of flexibility?

Public 
Private 
Hybrid
A

Hybrid

47
Q

Which of the following describes a benefit of cloud services?

Economies of scale 
Fixed workloads 
Unpredictable costs
A

Economies of scale

48
Q

Microsoft Office 365 is an example of?

Infrastructure as a Service
Platform as a Service 
Software as a Service
A

SaaS

49
Q

Which of the following describes Platform as a Service (PaaS)?

  • Users are responsible for purchasing, installing, configuring, and managing their own software (operating systems, middleware, and applications).
  • Users create and deploy applications quickly without having to worry about managing the underlying infrastructure.
  • Users pay an annual or monthly subscription
A

Users create and deploy applications quickly without having to worry about managing the underlying infrastructure.

50
Q

Which of the following requires the most user management of the cloud services?

Infrastructure as a Service 
Platform as a Service 
Software as a Service
A

IaaS

51
Q

You’re developing an application and want to focus on building, testing, and deploying. You don’t want to worry about managing the underlying hardware or software. Which cloud service type is best for you?

Infrastructure as a Service (IaaS) 
Software as a Service (SaaS) 
Platform as a Service (PaaS)
A

PaaS

52
Q

You plan to migrate several servers from an on-premises network to Azure. What is an advantage of using a public cloud service for the servers over an on-premises network?

  • The public cloud is owned by the public, NOT a private corporation
  • The public cloud is a crowd-sourcing solution that provides corporations with the ability to enhance the cloud
  • All public cloud resources can be freely accessed by every member of the public
  • The public cloud is a shared entity whereby multiple corporations each use a portion of the resources in the cloud
A

The public cloud is a shared entity whereby multiple corporations each use a portion of the resources in the cloud.

53
Q

In which type of cloud model are all the hardware resources owned by a third-party and shared between multiple tenants?
private
hybrid
public

A

Public

54
Q

You have 50 virtual machines hosted on-premises and 50 virtual machines hosted in Azure. The on-premises virtual machines and the Azure virtual machines connect to each other. Which type of cloud model is this?

hybrid 
private 
public
A

Hybrid

55
Q

Azure Cosmos is an example of…

A

PaaS

56
Q

What are two characteristics of the public cloud?

dedicated hardware
unsecured connections 
limited storage 
metered pricing 
self-service management
A

metered pricing
self-service management

57
Q

Which of the following ensures data-residency and compliance needs are met for customers who need to keep their data and applications close?

Geographies 
Regions 
Zones
A

Geographies

58
Q

Microsoft Azure datacenters are organized and made available by?

Geographies 
Regions 
Zones
A

Regions

59
Q

You plan to migrate a web application to Azure. The web application is accessed by external users. You need to recommend a cloud deployment solution to minimize the amount of administrative effort used to manage the web application. What should you include in the recommendation?

Software as a Service (SaaS) 
Platform as a Service (PaaS) 
Infrastructure as a Service (IaaS) 
Database as a Service (DaaS)
A

PaaS

60
Q

You plan to provision Infrastructure as a Service (IaaS) resources in Azure. Which resource is an example of IaaS?

an Azure web app 
an Azure virtual machine 
an Azure logic app 
an Azure SQL database
A

Azure VM

61
Q

You have an on-premises network that contains several servers. You plan to migrate all the servers to Azure. You need to recommend a solution to ensure that some of the servers are available if a single Azure data center goes offline for an extended period. What should you include in the recommendation?

fault tolerance 
elasticity 
scalability 
low latency
A

Fault tolerance

62
Q

Your company hosts an accounting application named App1 that is used by all the customers of the company. App1 has low usage during the first three weeks of each month and very high usage during the last week of each month. Which benefit of Azure Cloud Services supports cost management for this type of usage pattern?

high availability 
high latency 
elasticity 
load balancing
A

elasticity

63
Q

To which cloud models can you deploy physical servers?

private cloud and hybrid cloud only 
private cloud only 
private cloud, hybrid cloud and public cloud 
hybrid cloud only
A

private cloud and hybrid cloud only

64
Q

An Azure web app that queries an on-premises Microsoft SQL server is an example of a ______ cloud.

hybrid
multi-vendor
private
public
A

Hybrid

65
Q

You have 1,000 virtual machines hosted on the Hyper-V hosts in a data center. You plan to migrate all the virtual machines to an Azure pay-as-you-go subscription. You need to identify which expenditure model to use for the planned Azure solution.

Which expenditure model should you identify?

operational 
elastic 
capital 
scalable
A

Operational

66
Q

Your company plans to migrate all its data and resources to Azure. The company’s migration plan states that only Platform as a Service (PaaS) solutions must be used in Azure. You need to deploy an Azure environment that meets the company migration plan. Solution: You create an Azure App Service and Azure SQL databases.

Does this meet the goal?

A

Yes

67
Q

Your company plans to migrate all its data and resources to Azure. The company’s migration plan states that only Platform as a Service (PaaS) solutions must be used in Azure. You need to deploy an Azure environment that meets the company migration plan. Solution:

You create an Azure App Service and Azure virtual machines that have Microsoft SQL Server installed.

Does this meet the goal?

A

No

VMs are considered infrastructure.

68
Q

A company is planning on hosting their resources within Microsoft Azure. Management wants to know the Capital Expenditure (CapEx) and Operational Expenditure (OpEx) costs that would be incurred if they migrated their entire IT infrastructure to Microsoft Azure. Does Microsoft Azure provide flexibility to companies when it comes to Capital Expenditures (CapEx) and Operational Expenditures (OpEx)?

A

Yes

69
Q

What’s the difference between scalability and elasticity ?

A

Scalability Manual Scaling.
Elasticity scales automatically to meet sudden demands.

70
Q

Where will a private clouds infrastructure be located ?

A

On a private network

71
Q

What is a region pair ?

A

Two paired data centers in the same geographic area at least 300 miles away

72
Q

Where are availibilty sets located ?

A

Same data center in two different fault domains (rack of servers)

73
Q

Which Azure feature enhances manageability and realibility by provisioning instances based om workload ?

A

Azure Autoscale

74
Q

In a public cloud model who is responsible for installing critical updates on a VM ?

A

Customer

75
Q

What is an availability zone ?

A

A physically separate zone within an Azure region

76
Q

What are the benefits of availability zones ?

A

Zone redundant services

77
Q

What are zone redundant services ?

A

If a zone becomes unavailable, you app can fail over into another availability zone without interruption

78
Q

For IaaS, what is the subscriber responsible for ?

A

Apps
Data
Run time
Middle ware
OS

79
Q

For IaaS, what is the provider responsible for ?

A

Virtualization
servers
storage
Physical Networking

80
Q

What is a Service Level of Agreement (SLA) ?

A

Guarantee uptime of resources, usually stated as a percentage.

81
Q

Who is responsible for the management of accounts ?

A

The User, in all service options.

82
Q

What is Cloud Bursting

A

Cloud based resources come online to address increased workloads.

83
Q

What are Spot instances ?

A

Taking adavantage of unutilized compute capacity to perform tasks, hence reducing costs.

84
Q

In a public cloud model, who is responsible for installing critical updates on VMs ?

A

Customer

85
Q

Which one of these statements best describes cloud computing?
- Cloud service providers lease expensive server hardware for long-term rentals.
- Customers hire service providers to build a cloud their corporate location.
- Cloud service providers offer computing resources to customers as a service.
- Customers host their applications using traditional IT stacks on vendor hardware.

A

Cloud service providers offer computing resources to customers as a service.

86
Q

What are the four basic characteristics of cloud computing?

A

resource pooling, elasticity, pay per use, and automation

87
Q

What type of cloud configuration enables Cloud Burst?

A

Hybrid

88
Q

What is cloud bursting ?

A

A configuration that’s set up between a private cloud and a public cloud to deal with peaks in IT demand

89
Q

What is Scalability an attribute of ?

A

The application

90
Q

What is elasticity an attribute of ?

A

The infastructure

91
Q

What attribute of the cloud allows the application to continue running without disruption because of instantaneous problems within a system?

A

Fault tolerance

92
Q

What is the customer always responsible for ?

A

Data

93
Q

What is the cloud provider always responsible for ?

A

Underlying Physical Infrastructure

Az-900 (3 decks)

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