Cloud Computing Interview Questions and Answers for 10 years experience

100 Cloud Computing Interview Questions & Answers
  1. What are the three main service models in cloud computing?

    • Answer: The three main service models are Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS). IaaS provides virtualized computing resources like servers, storage, and networking. PaaS offers a platform for developing, running, and managing applications without managing the underlying infrastructure. SaaS delivers software applications over the internet, eliminating the need for local installation and maintenance.
  2. Explain the difference between public, private, and hybrid cloud deployments.

    • Answer: A public cloud is owned and operated by a third-party provider and is available to the general public. A private cloud is exclusively used by a single organization and can be hosted on-premises or by a third-party provider. A hybrid cloud combines public and private clouds, allowing organizations to leverage the benefits of both.
  3. What are some key benefits of using cloud computing?

    • Answer: Key benefits include cost savings (reduced capital expenditure, pay-as-you-go pricing), scalability (easily increase or decrease resources as needed), increased agility (faster deployment of applications and services), enhanced collaboration (access resources from anywhere), improved disaster recovery (data redundancy and backups), and higher efficiency (automation and streamlined processes).
  4. Describe the concept of virtualization in cloud computing.

    • Answer: Virtualization allows multiple virtual machines (VMs) to run on a single physical server. This enhances resource utilization, improves flexibility, and simplifies management. Different types of virtualization exist, including server, storage, and network virtualization.
  5. Explain the role of APIs in cloud computing.

    • Answer: APIs (Application Programming Interfaces) are crucial for interacting with cloud services. They provide a standardized way for applications and services to communicate and exchange data, enabling integration and automation within cloud environments.
  6. What are some common cloud security challenges?

    • Answer: Common security challenges include data breaches, unauthorized access, data loss, compliance issues, insider threats, denial-of-service attacks, and misconfigurations.
  7. How do you ensure data security in a cloud environment?

    • Answer: Data security is ensured through a multi-layered approach including encryption (data in transit and at rest), access control (IAM roles and permissions), regular security audits, vulnerability scanning, intrusion detection/prevention systems, and adhering to security best practices and compliance standards (e.g., ISO 27001, SOC 2).
  8. What are different cloud deployment models?

    • Answer: Beyond public, private, and hybrid, we also have community clouds (shared by a specific community with common concerns) and multi-cloud (using services from multiple cloud providers).
  9. Explain the concept of cloud bursting.

    • Answer: Cloud bursting is a strategy where applications run primarily on-premises but temporarily leverage the cloud's resources to handle peak demands. This allows for scalability without significant upfront investment.

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