20 Most Asked Cloud Computing Interview Questions in 2026

Cloud computing is being touted as the "next big thing" in IT today. Almost all interview questions relevant to the area of interviews on cloud computing are included in this guide and well-tested with simple and concise answers to enable effective interview preparations. 

1. What is Cloud Computing?

Cloud computing is the delivery of computing services - servers, storage, databases, networking, software, and analytics - over the Internet (the cloud). This can be used by customers to consume whatever resources on demand without purchasing or maintaining physical assets.

2. What are the main types of cloud computing services?

There are three major types of cloud services:

• IaaS – Infrastructure as a Service – provides computer resources in a virtualized environment over the Internet.

• PaaS – Platform as a Service, provides a platform to develop, run, and manage applications.

• SaaS – Software as a Service: Fully developed applications running on the Internet.

3. What are the different deployment models in cloud computing?

• Public Cloud: Services are provided and made available over the public Internet.

• Private Cloud: An environment that is for the exclusive use of one organization.

• Hybrid Cloud: a mixture of public and private clouds, involving multiple different cloud resources.

• Community Cloud: Share between a number of organizations with the same community of interest.

4. What are the advantages of cloud computing?

• Cost Efficiency

• Scalability and Flexibility

• Availability and Dependability

• Automatic Updates and Maintenance

• Backup and Disaster Recovery Assistance

5. What are the drawbacks of cloud computing? 

• Internet dependence

• Minimal control over infrastructure

• Data threats to security and privacy

• Downtime or outages from the provider's end

6. What is virtualization in cloud computing?

Virtualization allows multiple VMs (virtual machines) to run on a single physical server. As a result, proper resource utilization and workload isolation take place.

7. What can scalability in cloud computing be defined as?

Scalability, therefore, is defined by how a cloud can increase or decrease IT resources according to demand. An instance is the automatic increase in the number of servers when the web traffic is rising. 

8. What is elasticity in the cloud? 

Elasticity refers to the ability to allocate or deallocate resources automatically based on workload differentiation being provisioned in real-time for cost optimization and maximum performance.

9. What is the difference between scalability and elasticity? 

• Scalability: The ability to cope with an increasing workload by hiring resources.

• Elasticity: Automatically scaling resources up or down depending on real-time demands.

10. What is cloud storage? 

Cloud storage is the storing of data on remote Internet servers, such as on Google Drive, Amazon S3, Dropbox, etc. 

11. What is serverless computing? 

Serverless computing lets a coder execute code without worrying about the infrastructure on which it executes. Say, for example, AWS Lambda, Azure Functions, and Google Cloud Functions, which do all the heavy lifting, provisioning servers, scaling, and managing them.

12. What do you understand by the term hypervisor? 

A hypervisor denotes an application that creates and runs virtual machines. It enables multiple operating systems to operate within one hardware host. Hyperviser exists in two categories: 

• Type 1 (Bare-metal): runs directly on the hardware.

• Type 2 (Hosted): Runs on top of the host operating system.

13. Difference between horizontal and vertical scaling? 

• Horizontal Scaling: Add more machines (servers) to the system. 

• Vertical Scaling: Increase the capacity of the existing machines (CPU and RAM).

14. What is migration to the cloud? 

Moving data, applications, or other business components from on-premises servers to a cloud environment is termed migration to the cloud. 

15. Name the most important cloud computing service providers. 

• Amazon Web Services (AWS)

• Microsoft Azure

• Google Cloud Platform (GCP)

• IBM Cloud 

• Oracle Cloud 

16. What is a load balancer in cloud computing? 

A device that distributes incoming traffic among servers so that no individual server will be overwhelmed or stressed while still ensuring maximum availability and excellent performance of the servers.

17. What is a cloud API? 

Cloud API or Application Programming Interface allows programs to perform a task programmatically with cloud services, for example, creating or managing resources. 

18. What are the Security Issues in Cloud Computing? 

• Data breaches and loss 

• Unsecured APIs 

• Internal threats 

• Poor identity and access management 

• Compliance and regulatory issues 

19. What is multi-tenancy in the cloud 

Multi-tenancy refers to the case where multiple users (tenants) share the same cloud infrastructure and resources while keeping their data and security isolated from each other. 

20. What is SaaS? Give an example. 

SaaS: Software as a Service exposure to a software application across the Internet, thereby removing the need for installation and maintenance. 

Example: Gmail, Salesforce, Microsoft 365.

Conclusion 

Cloud computing, from the day of its existence, broadcast uniqueness in the IT world with such enormous give-aways – scalability, flexibility, and cost savings that could suit any organization. Indeed, because of the rapid and innovative delivery demands, raising the adoption of cloud technologies across different markets, companies hardly care about whether it is a serverless PaaS, IaaS, or AI-driven cloud service.

Skills for everyone, as a leading name in IT education and cloud technology training, plays a vital role in empowering professionals to stay ahead in this dynamic domain. By providing hands-on guidance in AWS, Azure, Google Cloud, and other emerging platforms, skills for everyone helps learners master both the foundational and advanced aspects of cloud computing. Through real-world projects, expert mentorship, and industry-aligned certifications, skills for everyone ensures that students are not only interview-ready but also job-ready for high-demand roles in the cloud ecosystem.

In an era where organizations increasingly rely on cloud technologies for innovation and efficiency, skills for everyone stands as a trusted gateway to building future-ready cloud professionals who can confidently navigate the ever-expanding digital frontier.