☰
Knowledge
Guide
◐
▶
DSA
▶
Foundations
46
🔎 Pattern Recognition
★
▶
Arrays
15
▶
Two Pointers
5
▶
Sliding Window
8
▶
Matrix
9
▶
Hashing
21
▶
Stack
22
▶
Queues
12
▶
Linked List
16
▶
Recursion
44
▶
Trees
95
▶
Heap
13
▶
Graphs
28
▶
Trie
10
▶
Sorting
9
▶
Searching
8
▶
Greedy
7
▶
Backtracking
6
▶
Divide & Conquer
6
▶
Dynamic Programming
80
▶
Advanced Patterns
72
▶
Company Practice
237
▶
Concurrency
▶
Concurrency Foundations
21
▶
Concurrency Problems
22
▶
Lock-Free & Memory Ordering
5
▶
Databases
▶
Foundations
1
🔎 Pattern Recognition
★
▶
Database Engine Internals
5
▶
Database
4
▶
Data Modeling
4
▶
ER Models
6
▶
Relational Model
6
▶
Functional Dependency
4
▶
Normalization
16
▶
SQL Fundamentals
39
▶
Transactions & Concurrency Control
3
▶
Indexing & Storage
3
▶
Query Execution
2
▶
SQL Practice Problems
83
▶
OO & Low-Level Design
▶
OOD Foundations
7
▶
SOLID Principles
23
▶
Design Patterns Overview
8
▶
Creational
6
▶
Structural
7
▶
Behavioral
11
▶
OO Design Problems
17
▶
System Design
Fundamentals & Interview Approach
▶
System Design
1
▶
System Design Building Blocks
27
▶
Capacity Estimation
18
▶
Glossary & Cheat-Sheet
2
Systems Thinking & Mental Models
▶
Mental Models & Systems Thinking
11
Systems Engineering (OS, Observability)
▶
OS & Kernel Internals
5
▶
Observability & SRE
5
Networking & Delivery
▶
Networking Fundamentals
3
▶
DNS
3
▶
Proxy Server
4
▶
Load Balancing
9
▶
API Gateway
15
▶
CDN
4
Caching
▶
Caching
11
Databases & Storage
▶
Databases
13
▶
Data Partitioning
5
▶
Distributed File System
11
Replication & Reliability
▶
Replication
5
▶
Redundancy
1
▶
Leader and Follower
2
▶
Heartbeat
1
▶
Checksum
2
Consistency & Coordination
▶
CAP Theorem
7
▶
Quorum
2
▶
Bloom Filters
5
Messaging & Streaming
▶
Messaging System
1
▶
Kafka
6
Security
▶
Security and Privacy
1
▶
Authentication
3
▶
Authorization
3
▶
Encryption
3
Trade-offs
▶
System Design Trade-offs
24
Microservices
▶
Microservices Patterns
95
Advanced / Scalable Systems
▶
Scalable Systems (Advanced Topics)
52
Worked Problems
▶
System Design Problems
36
▶
Career & Job Search
▶
AI & Prompt Basics
3
▶
Prompt Fundamentals
2
▶
Advanced Prompting
3
▶
Building Your Portfolio
3
▶
Resume
3
▶
Freelance Marketplaces
3
▶
Cover Letters
3
▶
Emails
4
▶
LinkedIn
5
▶
Job-Hunt Automation & SEO
3
▶
Personal Brand
3
▶
Interviews
6
▶
Maintenance & Scaling
3
▶
Wrap-Up
1
Knowledge Guide
A unified, hand-crafted path from zero to interview-ready. Pick a track:
DSA
22 topics
Concurrency
3 topics
Databases
13 topics
OO & Low-Level Design
7 topics
System Design
35 topics
Career & Job Search
14 topics
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