Big O Notation Explained in 3 Minutes — For Beginners & Interviews

Learn what Big O notation really means and why it’s essential for coding interviews and real-world programming. We’ll cover what it measures, why you can’t just “run the program” to test speed, the difference between time and space complexity, and the most common complexity classes you’ll encounter. This is the first video in our “Big O” series — short, clear, and beginner-friendly.

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