LearnViz CompSci
Home / Learn / Operating Systems / Kernel

Beginner Topic 2 of 51 Operating Systems

Kernel

Privileged core of the OS controlling hardware access.

How it works

The kernel runs with full hardware privileges, handling scheduling, memory, drivers and system calls. Everything else runs in user space and asks the kernel for services.

Where it is used

Linux kernel, Windows NT kernel.

Common pitfall

A bug in kernel code can crash the whole system, so it is kept small and carefully audited.

Where it fits in the course

Kernel is topic 2 of 51 in Operating Systems, rated Beginner. It follows What is an Operating System. The next topic is User Mode vs Kernel Mode.

Practice and explore

How to study this topic

  1. Read the explanation above and restate the definition in your own words.
  2. Open the interactive lesson and answer its mini quiz.
  3. Read the common pitfall, then write a short example that avoids it.
  4. Check your understanding in the Operating Systems quiz, and revisit the topic if you miss a question.

Frequently asked questions

What is Kernel?
Privileged core of the OS controlling hardware access. It belongs to Operating Systems and is a beginner-level topic.
Where do people use Kernel?
Linux kernel, Windows NT kernel.
What is the most common mistake with Kernel?
A bug in kernel code can crash the whole system, so it is kept small and carefully audited.
What should I learn before this topic?
Start with What is an Operating System, the topic just before it in Operating Systems.
How can I practice it?
Answer the mini quiz in the interactive lesson, then take the Operating Systems quiz.
Is Kernel hard to learn?
It is a Beginner topic, so it works as an entry point. If the terms are new, read the explanation twice and try the visualizer before the quiz.
How long does it take to learn Kernel?
Most learners can read the explanation and finish the interactive lesson in under an hour. Fluency comes from applying the idea, so plan a few short practice sessions with the quiz.
Which topics are related to Kernel?
What is an Operating System, User Mode vs Kernel Mode, System Calls are closely connected. The full list is in the related topics section of this page.
What should I study after Kernel?
Continue with User Mode vs Kernel Mode, the next topic in Operating Systems.

Related topics