Containerization Vs VM Top Interview Question

Here’re the top differences between Containerization and VM (Virtual Machines). The pros, cons explained in this post.

Virtual Machines/Cloud computing/Containerization these are hot in the market. However, this post’s aim is to demonstrate the differences among these. Also, it is an useful interview question.

Virtual Machines

  1. Need host operating system. On top of the host, you can create n number of VMs. You cannot share data among VMs.
  2. Each VM consumes CPU and RAM.
  3. Booting takes more time for Virtual Machines
  4. Moving the software applications (workloads) to the cloud is hard.
  5. Managing software licenses is expensive
  6. Security maintenance is laborious, since you need to take care of all the VMs.

Bare metal Cloud servers

You can call them sand boxes. These servers can’t share resources with other servers and they just like individual entities.

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  1. Naturally, one operating system allows multiple containers.
  2. Plainly, one machine is enough to work with containers.. So, for containerization the need of resources is less.
  3. Software licensing cost is minimal.
  4. Portable in nature. You can easily port them from one server to another.
  5. Creating a container with the software- workload is easier.
  6. Moving software-workloads to the cloud is smoother. Containers very much needed for cloud migration, because of its ease of portability.

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Author: Srini

Experienced software developer. Skills in Development, Coding, Testing and Debugging. Good Data analytic skills (Data Warehousing and BI). Also skills in Mainframe.