Cloud Service Models (IaaS, PaaS, SaaS) Questions and Answers for Viva

Answer-1: IaaS (Infrastructure as a Service) provides virtualized computing resources such as servers, storage, and networking over the internet.

Answer-2: PaaS (Platform as a Service) provides a platform allowing developers to build, deploy, and manage applications without managing the underlying infrastructure.

Answer-3: SaaS (Software as a Service) delivers software applications over the internet on a subscription basis without user-managed infrastructure.

Answer-4: Amazon Web Services (AWS) EC2 is a popular example of an IaaS provider.

Answer-5: Google App Engine and Microsoft Azure App Services are examples of PaaS providers.

Answer-6: Google Workspace, Dropbox, and Salesforce are examples of SaaS applications.

Answer-7: Key features include on-demand infrastructure, scalability, pay-as-you-go pricing, and self-service provisioning.

Answer-8: PaaS provides development tools, middleware, database management, and application hosting.

Answer-9: SaaS features include remote access, multi-tenancy, automatic updates, and user-friendly interfaces.

Answer-10: It provides flexible and scalable infrastructure without the need for physical hardware.

Answer-11: It simplifies the development process and accelerates application delivery.

Answer-12: It offers ready-to-use applications accessible from any internet-enabled device.

Answer-13: IaaS offers the most control as users manage the OS, middleware, runtime, and applications.

Answer-14: PaaS is ideal for software development due to built-in tools and frameworks.

Answer-15: SaaS is designed for end-users needing access to software without setup or maintenance.

Answer-16: IaaS offers raw infrastructure, while PaaS offers a development environment on top of that infrastructure.

Answer-17: PaaS provides a platform for app development, while SaaS offers complete software to end-users.

Answer-18: Startups and enterprises needing flexible infrastructure for hosting websites or applications benefit from IaaS.

Answer-19: Software development companies and DevOps teams benefit most from PaaS.

Answer-20: Businesses of all sizes benefit from SaaS for services like email, CRM, and collaboration tools.

Answer-21: IaaS typically includes virtual machines, storage, networks, and load balancers.

Answer-22: PaaS includes development frameworks, databases, middleware, and application hosting services.

Answer-23: SaaS includes application software, data storage, and hosting infrastructure?all managed by the provider.

Answer-24: Yes, virtualization is a core component that enables resource sharing in IaaS.

Answer-25: No, in SaaS all infrastructure and software management is handled by the provider.

Answer-26: Customization is often limited but possible depending on the SaaS provider's options.

Answer-27: Middleware is software that connects different components of applications, such as databases and web servers, and is included in PaaS.

Answer-28: Yes, users can install and manage databases on IaaS virtual machines.

Answer-29: No, the OS and infrastructure are managed by the PaaS provider.

Answer-30: Yes, the SaaS provider typically manages data backup and recovery.

Answer-31: Yes, most PaaS platforms support multiple languages like Python, Java, PHP, and Node.js.

Answer-32: Yes, security, compliance, and patching are managed by the SaaS provider.

Answer-33: SaaS usually has the fastest deployment since it's ready to use out of the box.

Answer-34: Yes, IaaS offers on-demand scalability for compute, storage, and networking resources.

Answer-35: Challenges include managing security, updates, and configuration of servers.

Answer-36: Platform limitations, vendor lock-in, and lack of control over infrastructure can be challenges.

Answer-37: Limited customization and data security concerns are common challenges with SaaS.

Answer-38: Yes, but it may require refactoring the application to match PaaS platform standards.

Answer-39: Yes, many SaaS applications offer APIs or built-in integrations with other tools.

Answer-40: IaaS is billed based on usage of compute resources, storage, and data transfer.

Answer-41: PaaS is billed based on application runtime, storage, and add-on services used.

Answer-42: SaaS usually charges a flat monthly or annual subscription per user or organization.

Answer-43: Yes, PaaS platforms often include DevOps tools for CI/CD, testing, and monitoring.

Answer-44: Auto-scaling automatically increases or decreases resources in IaaS based on traffic or load.

Answer-45: Yes, most SaaS providers offer built-in disaster recovery and data redundancy.

Answer-46: SaaS is the easiest and most cost-effective option for small businesses.

Answer-47: Yes, PaaS supports mobile app development with SDKs, APIs, and backend services.

Answer-48: Containers help run applications consistently in PaaS across different environments.

Answer-49: IaaS can host legacy applications with minimal changes by providing compatible infrastructure.

Answer-50: PaaS significantly reduces time-to-market by simplifying development and deployment processes.