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level: Level 1 - Basic Cloud Knowledge

Questions and Answers List

level questions: Level 1 - Basic Cloud Knowledge

Question	Answer
Can increase or decrease resources on demand.	scalable
Scaling up, adding more cpu's or ram to a single server	Vertical Scaling
Scaling out, adding more servers that work together with other servers. Eg. have multiple servers handle incoming requests.	Horizontal Scaling
automatically add or remove resources based on demand eg. Add more resources at peak operation times. Or remove resoursecs when traffic patterns normalize	Elastic
the ability to do things more efficiently or at a lower-cost per unit when operating at a larger scale.	Economies of scale
CapEx is the spending of money on physical infrastructure up front, and then deducting that expense from your tax bill over time. CapEx is an upfront cost, which has a value that reduces over time.	Capital Expenditure (CapEx)
OpEx is spending money on services or products now and being billed for them now. You can deduct this expense from your tax bill in the same year. There's no upfront cost. You pay for a service or product as you use it.	Operational Expenditure (OpEx):
1. Leasing software & Customized features ○ You need to end subscriptions when they are not being used 2. Scaling charges based on demand 3. Subscription pay-per-use model	3 Opex Costs in Cloud computing
Server, storage, networking, backup & archiving, disaster recovery, datacentre, technical personel costs	List 6 costs in Capex server
Public, Private, Hybrid	List 3 Cloud deployment models
Iaas, paas, saas	3 types of cloud services
the most flexible category of cloud services. It aims to give you complete control over the hardware that runs your application (IT infrastructure servers and virtual machines (VMs), storage, networks, and operating systems). Instead of buying hardware, you rent it. It's an instant computing infrastructure, provisioned and managed over the internet	what is Infrastructure as a service (IaaS)
an environment for building, testing, and deploying software applications. The goal of PaaS is to help you create an application quickly without managing the underlying infrastructure. For example, when deploying a web application using PaaS, you don't have to install an operating system, web server, or even system updates.	What is Platform as a service (PaaS)
SaaS is software that is centrally hosted and managed for the end customer. It is usually based on an architecture where one version of the application is used for all customers, and licensed through a monthly or annual subscription. Office 365, Skype, and Dynamics CRM Online are perfect examples of SaaS software.	what is saas cloud
1. Business case 2. Requirments 3. Migration 4. Testing 5. Deployment 6. Operate (devops) 7. Improve	What are the 7 steps in a cloud migration?
Total cost of ownership and return on investment. We need to use these when communicating value to an orginization. We need to calculate these values for them.	what is TCO and ROI and why are they important
Self-Healing	This ability allows a system to perceive it is not working properly and, without human intervention, make adjustments to restore normal operations?