🧠 What is a Hypervisor?

A Hypervisor is software that creates and manages Virtual Machines.

It controls:

  • CPU allocation
  • RAM allocation
  • Storage
  • Network

Without a hypervisor, virtualization is not possible.

 

🖼️ Hypervisor Working Diagram

https://eu-images.contentstack.com/v3/assets/blt8eb3cdfc1fce5194/blt94503eac3cd959b3/662120cfd1210c7677fd4cbd/Hypervisor101-Type1.png

🔹 Types of Hypervisor

1️⃣ Type 1 (Bare Metal Hypervisor)

Runs directly on hardware.

Examples:

  • VMware ESXi
  • Microsoft Hyper-V

👉 More secure & high performance
👉 Used in Data Centers

 

2️⃣ Type 2 (Hosted Hypervisor)

Runs on top of an operating system.

Examples:

  • Oracle VirtualBox
  • VMware Workstation

👉 Used for learning & testing

https://miro.medium.com/v2/resize%3Afit%3A1400/0%2Ar7b1FbiZM3bdTZDf.png

🎯 Why Hypervisor is important?

✔ Manages multiple VMs
✔ Allocates system resources
✔ Provides isolation
✔ Improves security
✔ Enables cloud computing

 

🎤 Important Interview Questions 

Q1: What is a hypervisor?
👉 Software that creates and manages virtual machines.

Q2: Difference between Type 1 and Type 2?
👉 Type 1 runs directly on hardware; Type 2 runs on the OS.

Q3: Which hypervisor is more secure?
👉 Type 1 (Bare Metal).