Big-O Notation For Coding Interviews and Beyond
The ultimate guide to Big-O notation for coding interviews, developed by FAANG engineers. Learn algorithm complexity in simple terms and get interview-ready in just a few hours.
Please feel free to check out my linked-in profile for a detailed description of my professional experience.
Join 3.1 million developers at
What You'll Learn
- Analyze time and space complexity using best, worst, and average case scenarios
- Count operations in loops and nested loops to estimate running time from code
- Apply summation formulas to generalize instruction counts and move to Big-O estimates
- Use Θ, O, Ω, o, and ω notations to express tight and non-tight asymptotic bounds
- Solve recurrence relations to analyze recursive algorithms like merge sort and binary search
- Evaluate complexity trade-offs of arrays, linked lists, hash tables, stacks, queues, and trees
- Apply amortized and probabilistic analysis to compute average costs and expected values
Learning Roadmap
1.
Basics
Basics
2.
Formal Analysis Tools
Formal Analysis Tools
3.
Recursive
Recursive
8 Lessons
8 Lessons
4.
Data-Structures
Data-Structures
9 Lessons
9 Lessons
5.
Amortized Analysis
Amortized Analysis
5 Lessons
5 Lessons
6.
Probabilistic Analysis
Probabilistic Analysis
5 Lessons
5 Lessons
7.
Complexity Theory
Complexity Theory
6 Lessons
6 Lessons
8.
The End
The End
2 Lessons
2 Lessons
C. H. Afzal
A veteran of the Silicon Valley, I have been fortunate enough to work at some of the iconic companies of present times including Microsoft, Netflix, Cloudera, and Oracle. I have a keen interest in algorithms, product design, finance, and problem-solving.
Trusted by 3.1 million developers working at companies
Anthony Walker
@_webarchitect_
Evan Dunbar
ML Engineer
Software Developer
Carlos Matias La Borde
Souvik Kundu
Front-end Developer
Vinay Krishnaiah
Software Developer
Built for 10x Developers












Free Resources