DevOps Interview Question 19 - CMD vs ENTRYPOINT in Docker

DevOps Interview Question #19
Many engineers get confused between CMD and ENTRYPOINT in Docker 😳

In this short, I explain the difference in the simplest way 👇

🔹 CMD
Provides the default command or arguments for a container.
It can be easily overridden when running the container.

🔹 ENTRYPOINT
Defines the main executable that always runs when the container starts.
Extra arguments passed at runtime are usually appended to it.

⚡ Quick rule:
CMD = default command
ENTRYPOINT = fixed executable

💡 Easy way to remember:
Use CMD when you want flexible defaults.
Use ENTRYPOINT when the container should always run a specific program.
Use both together when you want a fixed executable with default arguments.

If you're preparing for Docker, DevOps, Kubernetes, or cloud interviews, this is a must-know topic!

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