How long does it take to learn computer science?

A traditional CS degree takes 4 years. Self-taught fundamentals (programming, DSA, systems basics) can take 1-2 years of dedicated study. Depth comparable to a degree requires 2-3 years. However, you can start working as a developer while continuing to deepen CS knowledge.

Do I need a CS degree to be a software developer?

No, many successful developers are self-taught or bootcamp graduates. However, CS fundamentals (DSA, systems, math) help with complex problems, system design interviews, and advanced roles. You can learn CS concepts without a formal degree through books, courses, and projects.

Which programming language should I start with?

Python is beginner-friendly with clear syntax. C teaches low-level concepts and memory management. Java is good for OOP and enterprise. For CS fundamentals, Python for algorithms and C for systems is a common path. Language matters less than concepts.

How important is mathematics for computer science?

Essential for certain areas: ML/AI needs linear algebra and statistics, graphics needs geometry, cryptography needs number theory. For web development, basic discrete math is sufficient. Strong math foundations open doors to advanced CS fields.

What CS courses are most important?

Core: Data Structures, Algorithms, Operating Systems, Databases. Important: Computer Architecture, Networks, Discrete Math. Advanced: Distributed Systems, Compilers, Machine Learning. Focus on core courses first - they're essential for technical interviews.

CS degree vs bootcamp vs self-taught?

Degree: Deep fundamentals, best for research/advanced roles, 4 years. Bootcamp: Practical skills, faster to jobs, 3-6 months. Self-taught: Flexible, requires discipline, variable time. Many successful paths exist - choose based on goals and circumstances.

How do I practice CS concepts effectively?

Implement data structures from scratch, solve LeetCode problems, build systems projects (OS, database, compiler), read classic CS books. Understanding trumps memorization - be able to derive and explain, not just recall. Teach others to solidify knowledge.

Are CS fundamentals needed for FAANG interviews?

Yes, FAANG interviews heavily test DSA, system design, and CS fundamentals. Strong algorithmic thinking is required. System design requires understanding databases, networking, and distributed systems. CS fundamentals are the foundation for passing technical interviews.

2026 Roadmap

Computer Science Roadmap

Master programming, data structures, algorithms, operating systems, databases, and networks. Your complete guide to building strong CS fundamentals in 2026.

12-24 Months•Comprehensive•High Demand

What is Computer Science?

Computer Science is the study of computation, algorithms, and information. It provides the theoretical foundation for building software systems, from understanding how computers work to designing efficient algorithms that solve complex problems.

Learning computer science equips you with fundamental knowledge that applies across all programming domains - whether you're building web applications, AI systems, games, or operating systems.

Key Responsibilities

Understand how computers work at all levels
Design efficient algorithms and data structures
Build and understand operating systems
Work with databases and information systems
Understand computer networks and protocols
Apply theoretical concepts to practical problems
Think computationally about complex problems

Learning Roadmap

Click on any topic to mark it as complete

Your Progress0/24 completed

Programming Fundamentals

You can program!

Mathematics

Data Structures

You know data structures!

Algorithms

Computer Architecture

You understand computer architecture!

Operating Systems

Database Systems

Computer Networks

Theory of Computation

Software Engineering

You have CS fundamentals!

Not Started

Completed

Milestone

Software Engineer Salaries 2026

United States (USD/Year)

New Grad (0-1 yr)

$70K - $120K

$95K

SDE I (1-3 yrs)

$100K - $150K

$125K

SDE II (3-6 yrs)

$150K - $220K

$180K

Senior+ (6+ yrs)

$200K - $400K+

$280K

India (INR/Year)

Fresher (0-1 yr)

₹4L - ₹15L

₹8L

Junior (1-3 yrs)

₹8L - ₹20L

₹14L

Mid (3-6 yrs)

₹18L - ₹40L

₹28L

Senior (6+ yrs)

₹35L - ₹80L+

₹50L

Strong CS fundamentals are essential for FAANG and top tech company interviews. System design and algorithmic skills command premium salaries. CS knowledge enables transitions into specialized high-paying fields like ML, distributed systems, and security.

Project Ideas

Build these to strengthen your portfolio

Shell Implementation

Beginner

Simple command-line shell

ProcessesSystem CallsParsingI/O

HTTP Server

Beginner

Basic web server

SocketsHTTP ProtocolConcurrencyFile I/O

Database from Scratch

Intermediate

Simple relational database

B-TreesSQL ParsingStorageIndexing

Operating System Kernel

Intermediate

Minimal OS kernel

Boot ProcessMemorySchedulingAssembly

Compiler

Advanced

Simple language compiler

LexingParsingASTCode Generation

Distributed System

Advanced

Consensus protocol implementation

NetworkingConsensusReplicationFault Tolerance

Frequently Asked Questions

Related Roadmaps

DSA

Deep dive into DSA

View Roadmap

System Design

Design scalable systems

View Roadmap

Backend Developer

Apply CS to backend

View Roadmap

Ready to Build Strong CS Fundamentals?

Get personalized guidance from experienced software engineers who can help you master computer science concepts.