Master DSA
Line by Line

Learn data structures and algorithms through interactive visualization. Trace code execution step-by-step, not just theory. 60 days to interview readiness.

60
Days to Master
100+
Algorithm Patterns
Interactive
Live Code Tracing

Why PrepTools?

We teach DSA the way your brain learns: visual, interactive, and focused on understanding—not memorization.

Live Code Tracing

Step through every line of code. See variable states, array shifts, and pointer movements in real-time.

Structured Curriculum

60-day progression from array basics to advanced graph algorithms. Each day builds on the last.

Practice Immediately

Learn theory, then debug broken code, predict outputs, and solve challenges—all on the same page.

Track Progress

Watch your mastery grow across 100+ algorithm patterns. Earn achievements as you progress through days.

Pattern Recognition

Learn to recognize algorithm patterns. Arrays → Stacks → Graphs. From basics to interview questions.

Interview Ready

Includes placement checkpoint questions and mock interviews modeled after real tech company interviews.

How It Works

1

Pick Your Day

Start with Day 1 (Array Basics) and progress through the 60-day curriculum. Each day teaches one specific concept or pattern.

2

Trace the Code

Watch the code execute line-by-line with visual state changes. See exactly how arrays shift, stacks pop, or graphs traverse.

3

Practice & Debug

Move to retrieval practice questions and debugging challenges without leaving the page. Solidify your understanding immediately.

4

Master the Pattern

Once you understand the pattern, apply it to variations and interview questions. Build real mastery, not just memorization.

60-Day Curriculum

From fundamentals to advanced patterns, systematically build your DSA knowledge.

Foundation (Days 1-9)

  • • Arrays: Read, Insert, Delete
  • • Stacks: Push, Pop, Applications
  • • Queues: Enqueue, Dequeue

Core Data Structures (Days 10-25)

  • • Linked Lists: Insert, Delete
  • • Binary Search Trees
  • • Unbalanced Trees, Balanced Trees

Graph Algorithms (Days 26-46)

  • • BFS & DFS Traversals
  • • Shortest Path, Cycle Detection
  • • Topological Sort, Graph Coloring

Advanced Techniques (Days 47-60)

  • • Sliding Window, Hashing
  • • Mock Interviews & Checkpoints
  • • Performance Review & Placement

Ready to Master DSA?

Join hundreds of learners preparing for their dream tech roles. Start free today—no credit card required.