Cloud Concepts Flashcards

Understand Fundamental Cloud Concepts

1
Q

What is Elasticity?

A

Ability to increase or decrease the instance count or size of existing resources based on fluctuations in traffic, load, or resource workload.

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2
Q

What is Low Latency?

A

The ability of a cloud service to be accessed quickly from any location via the internet.

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3
Q

What is PaaS and what is its primary use?

A

Platform as a Service. Primarily used for development and business analysis. Client controls only the applications and data, the infrastructure is owned and controlled by the cloud service provider.

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4
Q

What is economy of scale?

A

The ability to do things more efficiently or at a lower cost per unit when operating on a larger scale. The more you buy of something the less it costs.

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5
Q

What is SaaS and what is its primary use?

A

Software as a Service. Primarily used for applications. Completely controlled by the provider, users log in via the internet with a login ID and password and use it as needed.

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6
Q

What is IaaS and what is its primary use?

A

Infrastructure as a Service. Primarily used as virtual data centers. Provider controls the physical hardware, but the client controls the applications, operating systems, and configurations.

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7
Q

Microsoft Office 365 is an example of which cloud service?

A

Software as a Service (SaaS)

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8
Q

What is Fault Tolerance?

A

The concept of ensuring that servers are available if a single data center goes offline.

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9
Q

What are the characteristics of private clouds?

A
High Scalability
Improved Security
Cap-Ex over Op-Ex
Control over the Hardware
Single Organization owned
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10
Q

What is Scalability?

A

Ability to increase the instance count or size of existing resources.

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11
Q

What is Cap-Ex?

A

Capital Expense. Up-front investment
Creates benefits over a long period of time
i.e., your own data center

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12
Q

What is the consumption based pricing model?

A

Pay only for what you use, no up front investment

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13
Q

What is Op-Ex?

A

Operating Expense. No up-front investment
Creates immediate benefits
i.e., using cloud services

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14
Q

What is a Hybrid Cloud?

A

Combination of public and private clouds

i.e., your data center + Azure, Azure + AWS

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15
Q

What is a Public Cloud?

A

Resources in the cloud shared across multiple tenants/customers
i.e., Azure, AWS, Google Cloud

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16
Q

What is Disaster Recovery (DR)?

A

Ability to back up and restore data/apps/resources

17
Q

What is High Availability?

A

Ability to maintain acceptable continuous performance/Uptime

18
Q

What is Business Agility?

A

Ability to rapidly adapt to market and environmental changes in productive and cost-effective ways.

19
Q

What is Machine Learning?

A

A data science technique that allows computers to use existing data to forecast future behaviors, outcomes, and trends.

20
Q

What is a DDoS attack?

A

Distributed Denial of Service attack

Attacker uses many slave machines to overwhelm or disrupt traffic to victim