Computer Science, simulated live in your browser.
Book-la padikkira concept, browser-la live-a nadakkum. Run CPU scheduling, page replacement, data structures, automata, SQL and more — with animated diagrams, step-by-step explanation and exam-ready answers.
Practice by subject
Ten core Computer Science subjects, each with hands-on visual simulators.
Operating Systems
CPU scheduling, deadlocks, memory & page replacement
Explore →Data Structures
Stacks, queues, lists, trees, searching & sorting
Explore →C Programming
Program flow, variables, loops, arrays, pointers
Explore →C++
Classes, objects, inheritance, polymorphism, STL
Explore →Python
Variables, control flow, lists, dicts, recursion
Explore →Java
Classes, JVM, inheritance, exceptions, threads
Explore →Theory of Computation
DFA, NFA, grammars, derivations, Turing machines
Explore →HTML5 & CSS3
Tags, forms, tables, box model, flexbox, grid
Explore →JavaScript
Variables, functions, arrays, objects, DOM, async
Explore →PHP & MySQL
Output, forms, sessions, cookies, SQL & CRUD
Explore →MySQL
SQL queries, joins, subqueries, functions, DDL/DML, transactions & more
Explore →C++ Programming Lab
Pattern, mathematical, logical & array programs in C++ - each with a line-by-line code debugger and live simulation.
Explore →Computer Networks
250 animated simulations covering the complete Computer Networks paper - basics to routing, security, cloud and troubleshooting.
Explore →Database Management Systems
100 live DBMS simulations - architecture, ER modeling, normalization, constraints, views, transactions and concurrency control.
Explore →Computer System Architecture
180 live simulations - number systems, Boolean algebra, digital logic, CPU organization, assembly programming, I/O and memory hierarchy.
Explore →Data Structures & Algorithms
180 live simulations - arrays, stacks, queues, linked lists, trees, graphs, sorting, algorithm analysis, design techniques and advanced algorithms.
Explore →Everything for concept + exam
Each simulator is built like a mini classroom.
Interactive input
Enter your own processes, arrays, strings or queries and run instantly.
Live visual output
Gantt charts, memory frames, trees and tables render in real time.
Step-by-step
Every calculation is explained one step at a time — no black boxes.
Formula & algorithm
See the exact formula and algorithm behind each result.
Common mistakes
Avoid the exact errors students lose marks for in exams.
Exam answer format
Get the answer written the way TRB / university expects it.
How it works
Pick a simulator
Choose from 1919 simulators across 16 subjects.
Enter your input
Use the sample example or type your own values.
Run & watch it live
See the visual output and step-by-step working.
Save & print
Save your attempt and print an A4 report.
Made for
A single platform that fits three audiences:
Master every CS concept with exam-format answers.
Lab practice for OS, DS, TOC, DBMS and programming.
Visual-first learning that makes concepts click.
Start practising all 1919 simulators today
Create a free account and begin with the OS and Data Structures labs in seconds.
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