Most Asked DevOps Interview Questions
Here we have compiled the most probable DevOps interview questions asked in the industry. You will learn about software version control, Git repository, reverting a commit in Git, Vagrant, continuous testing elements, and the importance of continuous integration, testing, and deployment. These questions are curated after discussing with many interviewers and DevOps Training experts.
DevOps Tools
Interview Questions
251. Do you run Docker compose in production?
Of course yes, used docker compose in production. It’s good to define applications with compose files in production, so that the same can be used in various stages like staging, testing, pre-prod etc.
252. What is Jenkins X?
Jenkins X is an open-source project that extends the capabilities of Jenkins, the popular automation server, specifically tailored for Kubernetes-based development and continuous integration/continuous delivery (CI/CD) pipelines. It aims to streamline and automate the process of building, deploying, and managing cloud-native applications on Kubernetes.
253. What is Terraform?
Terraform is a tool to create and control infrastructure(computer networks, storage, software applications, and other digital services) using simple instructions. It can manage these systems across various cloud providers like AWS, Azure, and GCP, all using just one tool.
These simple instructions are known as code. If we have code, then we can create infrastructure. So, we have infrastructure in the form of code, meaning Infrastructure as Code (IaC).
Terraform is open-source, written in Golang, and created by HashiCorp, offering features like idempotency and scalability for managing infrastructure deployments efficiently.
254. What is IaC?
IaC stands for "Infrastructure as Code". It's a way to use code to set up and manage computer systems, like servers and networks, instead of doing it manually. By writing code, they can automate these tasks, which makes managing infrastructure easier, faster, and more reliable. It also helps ensure consistency and allows for easier tracking of changes.
255. What is IaS?
IaC stands for Infrastructure as a Service, is a cloud computing model where users can rent virtualized computing resources like servers and storage over the internet. Instead of owning and maintaining physical hardware, organizations can access and manage these resources as needed. IaaS providers handle hardware maintenance, offering scalability, and flexibility. This enables businesses to focus on their applications without the hassle of managing physical infrastructure.
256. What purpose does Terraform serve in the realm of infrastructure as code (IaC)?
Terraform serves as a fundamental tool for automating the provisioning, deployment, and management of infrastructure resources. Its primary purpose is to streamline and standardize the process of infrastructure configuration through code. Here's how Terraform serves in the realm of IaC:
- Automation of Infrastructure Deployment
- Scalability and Consistency
- Version Control and Auditing
- Multi-Cloud and Hybrid Cloud Support
- Dependency Management and Execution Plans
- Modularity and Reusability
- Infrastructure as Code Best Practices
257. Explain the difference between declarative and imperative programming?
| Declarative | Imperative |
| Focuses on what the program should achieve without detailing the process. | Explicitly states how the program should achieve the desired result. |
| Expresses the logic of a computation without revealing its control flow or state management. | Involves writing step-by-step instructions for the computer to follow. |
| Defines the desired result and lets the system determine the steps to achieve it. | Closer to the machine's way of thinking, requiring a clear understanding of system internals. |
| Examples include SQL for database management and HTML/CSS for front-end UI design. | Commonly used in languages like C, Java, and Python. |
258. Does Terraform fits into declarative or imperative paradigm?
Terraform primarily fits into the declarative paradigm of programming. While it has some imperative-like features such as for loops, dynamic blocks, and complex data structures, Terraform's core approach is declarative. In declarative programming, the focus is on defining the desired outcome without specifying the exact steps to achieve it, allowing the system to determine how to reach that state efficiently.
259. What are providers?
Terraform, providers are plugins that interact with APIs and manage resources within specific cloud or service providers. These providers enable Terraform to provision and manage infrastructure resources across various platforms like AWS, Azure, Google Cloud, and more.
260. Why AWS-CLI is used?
AWS CLI (Command Line Interface) is used to interact with Amazon Web Services from the command line. It allows users to perform various tasks such as managing EC2 instances, S3 buckets, IAM roles, and more, directly from the terminal. AWS CLI provides a convenient and efficient way to automate tasks, script operations, and integrate AWS services into workflows without needing to use the AWS Management Console.
