BeginnerPhone
2 min
Docker vs Virtual Machines
DockerVirtualizationContainers
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Interview Question
Explain the key differences between Docker containers and virtual machines. When would you use one over the other?
Key Points to Cover
- Containers share the host OS kernel, VMs have their own OS
- Containers are lighter and start faster
- VMs provide better isolation and security
- Use containers for microservices, VMs for legacy apps or strong isolation
Evaluation Rubric
Explains architectural differences (kernel sharing)30% weight
Mentions performance differences (startup time, resource usage)30% weight
Provides appropriate use cases for each40% weight
Hints
- 💡Think about what each technology virtualizes
- 💡Consider isolation levels and performance
Potential Follow-up Questions
- ❓What about container orchestration?
- ❓How do you handle persistent data in containers?
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