Top Cloud Computing Interview Questions and Answers

Here are top Cloud interview questions,

1. What is Cloud Computing?

Cloud Computing is the delivery of computing services over the internet, including storage, servers, databases, networking, software, analytics, and intelligence, eliminating the need for local infrastructure.

 

2. What are the main service models in Cloud Computing?

The main service models in Cloud Computing are:

   - Infrastructure as a Service (IaaS)

   - Platform as a Service (PaaS)

   - Software as a Service (SaaS)

 

3. What is the difference between Public, Private, and Hybrid Cloud?

Public Cloud is owned and operated by a third-party provider, Private Cloud is dedicated to a single organization, and Hybrid Cloud is a combination of both public and private clouds.

 

4. Explain the key benefits of Cloud Computing.

Key benefits of Cloud Computing include scalability, cost-effectiveness, flexibility, global accessibility, automatic updates, and easy resource management.

 

5. What is the difference between horizontal and vertical scaling?

Horizontal scaling means adding more instances of resources like servers to distribute the load, while vertical scaling involves increasing the power of existing resources.

 

6. What is serverless computing?

Serverless computing allows developers to focus on writing code without managing the underlying infrastructure. The cloud provider takes care of resource provisioning and scaling based on demand.

 

7. Explain the essential characteristics of Cloud Computing.

The essential characteristics are on-demand self-service, broad network access, resource pooling, rapid elasticity, and measured service (pay-as-you-go).

 

8. What is a Virtual Machine (VM)?

A Virtual Machine is a software emulation of a physical computer that allows multiple operating systems to run on a single physical host.

 

9. What are the security concerns in Cloud Computing?

Security concerns include data breaches, data loss, lack of control over data, compliance issues, and the shared responsibility model between the cloud provider and the customer.

 

10. What is the shared responsibility model in Cloud Computing?

The shared responsibility model defines the division of security responsibilities between the cloud provider and the customer. The provider is responsible for the security of the cloud infrastructure, while the customer is responsible for securing their applications and data.

 

11. Explain the concept of multi-tenancy in Cloud Computing.

Multi-tenancy refers to a cloud architecture where a single instance of an application serves multiple customers (tenants), while keeping their data isolated from each other.

 

12. What is CDN (Content Delivery Network)?

CDN is a distributed network of servers that deliver web content and other resources to users based on their geographic location, ensuring faster load times and reduced latency.

 

13. What are the three deployment models in Cloud Computing?

The three deployment models are Public Cloud, Private Cloud, and Hybrid Cloud.

 

14. How is data migration handled in Cloud Computing?

Data migration involves transferring data from an organization's local systems to the cloud. It is typically done using various tools and services provided by the cloud provider.

 

15. Explain the CAP theorem in Cloud Computing.

The CAP theorem states that in a distributed system, it is impossible to achieve all three properties simultaneously: Consistency, Availability, and Partition tolerance. A system can achieve only two of the three properties.

 

16. What is Docker?

Docker is a containerization platform that allows developers to package applications and their dependencies into a single container, ensuring consistency across different environments.

 

17. What are the key differences between Cloud Computing and traditional hosting?

Cloud Computing offers on-demand scalability, flexible pricing models, and global accessibility, while traditional hosting involves owning and managing physical servers.

 

18. How can you ensure data security in the cloud?

Data security can be ensured through strong encryption, implementing access controls, regularly monitoring and auditing system activities, and adhering to security best practices.

 

19. What is the role of a hypervisor in Cloud Computing?

A hypervisor is a software layer that enables multiple virtual machines to run on a single physical host, managing their resource allocation and isolation.

 

20. Explain the auto-scaling feature in Cloud Computing.

Auto-scaling automatically adjusts the number of resources (e.g., servers) allocated to an application based on its workload, ensuring optimal performance and cost-efficiency.

 

Above are few top Cloud interview questions. Remember to prepare and expand on these answers.

Good luck with your interview!  👍