Basics of Cloud Computing

1. What is Cloud Computing?
   • Answer: Cloud computing refers to the delivery of computing services (servers, storage, databases, networking, software, etc.) over the internet ("the cloud") to offer faster innovation, flexible resources, and economies of scale.
2. Name the three main types of cloud services models.
   • Answer: Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS).
3. Differentiate between public, private, and hybrid clouds.
   • Answer:
     • Public Cloud: Owned and operated by a third-party provider, available to the general public.
     • Private Cloud: Dedicated to a single organization, managed internally or by a third party.
     • Hybrid Cloud: Combines public and private clouds, allowing data and applications to be shared between them.

Cloud Service Models

1. What is IaaS? Provide an example.
   • Answer: Infrastructure as a Service provides virtualized computing resources over the internet. Example: Amazon Web Services (AWS) EC2.
2. Explain PaaS and give a use case.
   • Answer: Platform as a Service offers a platform allowing customers to develop, run, and manage applications without infrastructure management. Use case: Google App Engine.
3. Describe SaaS and provide an example.
   • Answer: Software as a Service delivers software applications over the internet, usually on a subscription basis. Example: Salesforce, Google Workspace.

Cloud Deployment Models

1. What are the main deployment models in cloud computing?
   • Answer: Public cloud, private cloud, hybrid cloud, and community cloud (shared among organizations with similar interests).
2. What factors influence the choice between different cloud deployment models?
   • Answer: Factors include data security requirements, compliance needs, performance expectations, and budget considerations.

Cloud Security

1. How is data security managed in the cloud?
   • Answer: Cloud providers implement security measures such as encryption, access control, multi-factor authentication, and regular audits to protect data.
2. What are the potential security risks associated with cloud computing?
   • Answer: Risks include data breaches, data loss, insecure APIs, shared vulnerabilities, and insider threats.

Cloud Architecture and Services

1. Explain the concept of elasticity in cloud computing.
   • Answer: Elasticity refers to the ability of a cloud system to automatically provision and de-provision resources based on demand, ensuring optimal resource utilization and cost efficiency.
2. What is cloud orchestration?
   • Answer: Cloud orchestration involves automating tasks and processes to manage complex cloud infrastructure deployments and workflows.
3. Describe the role of containers in cloud computing.
   • Answer: Containers provide a lightweight, portable runtime environment for applications, facilitating efficient deployment and scaling in cloud environments using tools like Docker and Kubernetes.