Cloud Concepts

Question 1

What is Elasticity?

Answer 1

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

Question 2

What is Low Latency?

Answer 2

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

Question 3

What is PaaS and what is its primary use?

Answer 3

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.

Question 4

What is economy of scale?

Answer 4

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.

Question 5

What is SaaS and what is its primary use?

Answer 5

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.

Question 6

What is IaaS and what is its primary use?

Answer 6

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.

Question 7

Microsoft Office 365 is an example of which cloud service?

Answer 7

Software as a Service (SaaS)

Question 8

What is Fault Tolerance?

Answer 8

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

Question 9

What are the characteristics of private clouds?

Answer 9

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

Question 10

What is Scalability?

Answer 10

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

Question 11

What is Cap-Ex?

Answer 11

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

Question 12

What is the consumption based pricing model?

Answer 12

Pay only for what you use, no up front investment

Question 13

What is Op-Ex?

Answer 13

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

Question 14

What is a Hybrid Cloud?

Answer 14

Combination of public and private clouds

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

Question 15

What is a Public Cloud?

Answer 15

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

Question 16

What is Disaster Recovery (DR)?

Answer 16

Ability to back up and restore data/apps/resources

Question 17

What is High Availability?

Answer 17

Ability to maintain acceptable continuous performance/Uptime

Question 18

What is Business Agility?

Answer 18

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

Question 19

What is Machine Learning?

Answer 19

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

Question 20

What is a DDoS attack?

Answer 20

Distributed Denial of Service attack

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