Cloud Computing: From Discovery to Expertise

1. Which of these players is considered the historical and global leader in Public Cloud?

Alibaba Cloud AWS (Amazon Web Services) IBM Cloud Oracle Cloud

2. In the 'Shared Responsibility Model', who is responsible for OS patch management in PaaS mode?

The customer The cloud provider Both No one

3. Which organization provided the reference definition of Cloud Computing (the 5 characteristics, 3 service models, 4 deployment models)?

ISO IEEE NIST W3C

4. In the '6 Rs' migration strategy, what does 'Rehosting' (Lift and Shift) mean?

Rewriting the application Moving the application to the cloud without major modification Changing providers Deleting the application

5. What is 'Horizontal Scaling' (Scaling Out)?

Adding RAM to a server Adding new servers to a cluster Changing the processor Expanding the datacenter

6. What does 'On-premise' mean?

In the public cloud Infrastructure installed locally on the company's premises A messaging service A sales promise

7. Which of these is NOT one of the 5 essential characteristics of Cloud according to NIST?

On-demand self-service Fixed annual subscription payment Rapid elasticity Broad network access

8. What does the concept of 'Bare Metal' mean in the Cloud?

A server without an operating system Renting a dedicated physical server without a shared virtualization layer A type of network cable Recycling computer hardware

9. If a service has 'three nines' (99.9%) availability, what is the maximum tolerated annual downtime?

5 minutes 8 hours 45 minutes 3 days 24 hours

10. In the IaaS model, which layer remains the responsibility of the customer?

Virtualization Physical hardware Operating System (OS) Datacenter cooling

Chapter Migration, costs and practices

11. What is the main architectural difference between a VM and a Container?

The VM is lighter The container shares the host OS kernel, the VM embeds its own full OS Containers only work on Linux There is no difference

12. What is the main difference between Scalability and Elasticity?

It is the same thing Scalability is the ability to support growth, elasticity is the automation of this adaptation Elasticity is manual Scalability only concerns storage

13. What does the acronym SLA stand for?

Service Level Agreement Security Layer Access System Logic Analysis Software License Authorization

14. What is the difference between a Region and an Availability Zone (AZ)?

It is the same thing A Region contains several independent Availability Zones The AZ is larger than the Region The Region is private, the AZ is public

15. What is the capacity of a system to automatically adapt its resources based on demand called?

Virtualization Elasticity Multi-tenancy Provisioning

16. What is the principle of 'Serverless' (FaaS)?

There are no more physical servers The user does not manage any infrastructure and only pays for the execution time of the code It is a cloud without an Internet connection It is reserved for file storage

17. Congratulations! What is the main advantage for a company moving to the Cloud?

It is always cheaper Agility and speed of innovation (Time to Market) No more need for IT professionals Servers never crash

18. Which service model is primarily intended for developers to deploy code without managing the OS?

IaaS PaaS SaaS BaaS

19. In NIST, what does 'Resource Pooling' mean?

Having a swimming pool at the office The mutualized sharing of physical resources between several customers Data storage Group payment

20. What is 'Multi-Cloud'?

Having multiple VMs Using the services of several different cloud providers (e.g., AWS + Azure) Using the cloud on multiple computers Having multiple accounts with the same provider