Top 5 LeetCode Patterns That Solve 80% of Interview Questions

You don't need to solve 500 LeetCode problems to get good at coding interviews.

Most interview questions are variations of a handful of patterns. Once you learn to recognize them, solving problems becomes much easier.

In this video, we'll cover the 5 most important LeetCode patterns that appear again and again in coding interviews.

Patterns Covered

✅ Sliding Window

Longest substring problems
Fixed-size and variable-size windows
Maximum/minimum length questions

✅ Two Pointers

Sorted arrays
Pair-sum problems
Palindrome checks
Partitioning techniques

✅ Fast & Slow Pointers

Linked list cycle detection
Finding the middle node
Detecting loop starts

✅ Tree DFS & BFS

Tree traversals
Path problems
Level-order traversal
Recursive and iterative approaches

✅ Dynamic Programming

Number of ways problems
Minimum cost optimization
Decision-making problems
State transition thinking
How to Practice

Instead of solving hundreds of random questions:

Pick one pattern.
Solve 3–5 representative problems.
Learn the template.
Practice until you can write it from memory.
Move to the next pattern.

You'll start noticing that many interview questions are just variations of the same underlying idea.

Key Takeaway

Pattern Recognition - Problem Count

50 carefully chosen problems across these patterns can teach you more than 200 random LeetCode questions.

Perfect for:

• LeetCode Preparation

• Coding Interviews

• FAANG Interviews

• DSA Learning

• Software Engineering Students

• Placement Preparation

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