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| # Day 21 Task: Important Docker Interview Questions | ||
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| ## Docker Interview | ||
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| Docker is a crucial topic for DevOps Engineer interviews, especially for freshers. Here are some essential questions to help you prepare and ace your Docker interviews: | ||
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| ## Questions | ||
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| - What is the difference between an Image, Container, and Engine? | ||
| - What is the difference between the Docker command COPY vs ADD? | ||
| - What is the difference between the Docker command CMD vs RUN? | ||
| - How will you reduce the size of a Docker image? | ||
| - Why and when should you use Docker? | ||
| - Explain the Docker components and how they interact with each other. | ||
| - Explain the terminology: Docker Compose, Dockerfile, Docker Image, Docker Container. | ||
| - In what real scenarios have you used Docker? | ||
| - Docker vs Hypervisor? | ||
| - What are the advantages and disadvantages of using Docker? | ||
| - What is a Docker namespace? | ||
| - What is a Docker registry? | ||
| - What is an entry point? | ||
| - How to implement CI/CD in Docker? | ||
| - Will data on the container be lost when the Docker container exits? | ||
| - What is a Docker swarm? | ||
| - What are the Docker commands for the following: | ||
| - Viewing running containers | ||
| - Running a container under a specific name | ||
| - Exporting a Docker image | ||
| - Importing an existing Docker image | ||
| - Deleting a container | ||
| - Removing all stopped containers, unused networks, build caches, and dangling images? | ||
| - What are the common Docker practices to reduce the size of Docker images? | ||
| - How do you troubleshoot a Docker container that is not starting? | ||
| - Can you explain the Docker networking model? | ||
| - How do you manage persistent storage in Docker? | ||
| - How do you secure a Docker container? | ||
| - What is Docker overlay networking? | ||
| - How do you handle environment variables in Docker? | ||
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| These questions will help you in your next DevOps interview. Write a blog and share it on LinkedIn to showcase your knowledge. | ||
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| **Happy Learning :)** | ||
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| [← Previous Day](../day20/README.md) | [Next Day →](../day22/README.md) |