Deeper models for undergraduate courses, interviews and work: change the inputs and see why. Each lab has 20 practice questions (easy, medium and hard): the first 5 are free, the rest come with SimuVeda Pro.
65 labs for College & beyond. Sign in to keep your score and see your progress here.
Watch sorting, searching, trees, heaps and graph algorithms run one step at a time, with animated visuals you can pause and replay.
Class 11–12 · College & beyondClass 11–12 Computer Science: searching, sorting and stacks
Launch simulator: Algo Simulator
Edit process arrival and burst times, then compare FCFS, SJF, SRTF, priority and round-robin schedules on a Gantt chart with waiting and turnaround times.
College & beyondCollege operating systems
Launch simulator: CPU Scheduling
Send addresses through direct-mapped, set-associative and fully associative caches, see tag, index and offset bits, and compare hit rates.
College & beyondCollege computer organisation
Launch simulator: Cache Mapping
Draw cells on a grid, set birth and survival rules, and watch Conway's Game of Life and other automata produce gliders, oscillators and chaos.
College & beyondBeyond the syllabus: complex systems
Launch simulator: Cellular Automata
Type an arithmetic expression and follow it through tokenising, parsing into a syntax tree, stack-machine code and evaluation.
College & beyondCollege compilers
Launch simulator: Compiler Pipeline
Edit sample text, build its Huffman code tree, compare bit counts with plain and fixed-length codes and the entropy limit, and watch the bits decode one by one.
College & beyondCollege information theory
Launch simulator: Compression Coding
Compare a full table scan with a B-tree index lookup on generated data, change table size and query selectivity, and count the rows and pages each one touches.
Class 11–12 · College & beyondClass 12 Computer Science: Database Concepts and SQL
Launch simulator: Database Indexes
Assign resources to processes, draw the resource-allocation graph, detect cycles, and run the Banker's algorithm to find safe sequences.
College & beyondCollege operating systems
Launch simulator: Deadlock
Encode 4 data bits with Hamming(7,4), flip bits in transit, compute the syndrome, and see single errors corrected and the limits when two bits flip.
College & beyondCollege networks and coding theory
Launch simulator: Error-Correcting Codes
Step a deterministic finite automaton through an input string, edit its transitions, and see which strings it accepts, from binary divisibility to turnstiles.
College & beyondCollege theory of computation
Launch simulator: Finite State Machines
Tune separation, alignment and cohesion for a flock of boids and watch coordinated flocking emerge from simple local rules, with a predator option.
College & beyondBeyond the syllabus: complex systems
Launch simulator: Flocking
Build an object graph with roots and references, drop roots, and watch mark-and-sweep and reference counting find garbage, including leaked cycles.
College & beyondCollege programming languages
Launch simulator: Garbage Collection
Insert keys into a hash table, compare chaining, linear and quadratic probing, and measure collisions and probes as the load factor grows.
College & beyondCollege data structures
Launch simulator: Hash Tables
Toggle inputs on digital circuits from single gates to a half adder, full adder and SR latch, trace signal propagation, and generate truth tables.
Class 11–12 · College & beyondClass 11 Computer Science: Computer Systems (Boolean logic)
Launch simulator: Logic Gates
Run a page reference string through FIFO, LRU, Optimal and Clock, change the frame count, and compare page faults, including Bélády's anomaly.
College & beyondCollege operating systems
Launch simulator: Page Replacement
Generate a toy RSA key from two primes, encrypt and decrypt a message step by step, sign it, and see why factoring the modulus breaks the key.
Class 11–12 · College & beyondBuilds on Class 10 Maths: Real Numbers (primes)
Launch simulator: RSA Cryptography
Build architectures from load balancers, caches, queues and databases, then watch traffic flow and see where they break.
College & beyondSoftware engineering: system design
Launch simulator: System Design Simulator
Interleave two database transactions under different isolation levels and watch dirty reads, lost updates and write skew appear or get blocked.
College & beyondCollege databases
Launch simulator: Transaction Isolation
Move a sound source and a listener, watch wavefronts bunch up and spread out, and compare emitted and received frequency.
Class 11–12 · College & beyondClass 11 Physics: Waves
Launch simulator: Doppler Effect
Watch a sample of unstable nuclei decay at random, change half-life and starting count, and compare the stochastic count with the exponential expectation.
Class 11–12 · College & beyondClass 12 Physics: Nuclei
Launch simulator: Radioactive Decay
Move a sample of water or carbon dioxide around its pressure–temperature phase diagram and see where it is solid, liquid, gas or supercritical.
Class 11–12 · College & beyondExtends Class 9 states of matter; phase diagrams are college level
Launch simulator: Phase Diagram
Change substrate concentration, Vmax, Km and inhibitor type, and read reaction velocity curves and Lineweaver–Burk plots.
Class 11–12 · College & beyondClass 11 Biology: Biomolecules (enzymes)
Launch simulator: Enzyme Kinetics
Run the SIR model of an epidemic, change transmission, recovery and vaccination, and compare peak size, timing and final outbreak size.
Class 11–12 · College & beyondthe SIR model is college level
Launch simulator: Epidemic Dynamics
Run many populations at once under pure chance (Wright–Fisher model), change population size, and compare how fast alleles fix or vanish.
Class 11–12 · College & beyondClass 12 Biology: Evolution (Hardy–Weinberg, genetic drift)
Launch simulator: Genetic Drift
Stimulate a model neuron, change stimulus strength and membrane properties, and watch threshold, action potentials, refractory periods and firing rate.
Class 9–10 · Class 11–12 · College & beyondClass 10 Science: Control and Coordination; Class 11 Biology: Neural Control and Coordination
Launch simulator: Neuron Signals
Model rabbits and foxes with the Lotka–Volterra equations, change growth and predation rates, and inspect population cycles and the phase-plane orbit.
Class 11–12 · College & beyondClass 12 Biology: Organisms and Populations (population interactions)
Launch simulator: Predator and Prey
Set a prior, observe evidence such as test results or coin flips, and watch the posterior probability update with Bayes' theorem.
Class 11–12 · College & beyondClass 12 Maths: Probability (Bayes' theorem)
Launch simulator: Bayesian Updating
Take repeated samples from skewed or lumpy distributions, plot the sample means, and watch them form a normal curve as the sample size grows.
College & beyondCollege statistics
Launch simulator: Central Limit Theorem
Build square, sawtooth and triangle waves by adding sine harmonics, inspect the spectrum, and see the Gibbs overshoot at jumps.
College & beyondFourier series: college mathematics and engineering
Launch simulator: Fourier Synthesis
Explore the Mandelbrot set, Julia sets, the Koch snowflake and a fractal tree, changing iteration depth and parameters to see self-similar detail.
Class 11–12 · College & beyondBuilds on Class 11 Maths: Complex Numbers
Launch simulator: Fractals
Roll down a loss landscape with gradient descent, change the learning rate, start point and momentum, and see convergence, oscillation and divergence.
Class 11–12 · College & beyondBuilds on Class 12 Maths: Application of Derivatives (maxima and minima)
Launch simulator: Gradient Descent
Simulate thousands of experiments, change effect size, sample size and significance level, and measure false positives, power and p-values.
College & beyondCollege statistics
Launch simulator: Hypothesis Testing
Edit a 2×2 matrix and watch it transform a grid, the basis vectors and a shape, with determinant, eigenvectors and animation from the identity.
Class 11–12 · College & beyondClass 12 Maths: Matrices
Launch simulator: Linear Transformations
Edit transition probabilities between weather states, simulate a random walk through the chain, and compare visit frequencies with the stationary distribution.
College & beyondCollege probability
Launch simulator: Markov Chains
Pick a distribution, change its parameters, draw random samples and compare the histogram with the theoretical curve, mean and spread.
Class 11–12 · College & beyondClass 12 Maths: Probability
Launch simulator: Probability Distributions
Add, drag and delete data points and watch the least-squares line, residuals, R² and the pull of outliers update live.
Class 11–12 · College & beyondregression is college level
Launch simulator: Regression
Apply low-pass, high-pass, band-pass and notch filters, see the frequency response in decibels, and hear what they do to hum, a tone and hiss.
College & beyondCollege signals and systems
Launch simulator: Audio Filtering
Size an off-grid solar battery system, set load and generation profiles, and track state of charge, unmet demand and spilled energy hour by hour.
Class 11–12 · College & beyondBuilds on Class 12 Chemistry: Electrochemistry (batteries)
Launch simulator: Battery Storage
Load simply supported or cantilever beams, change span, material and section, and see deflection, bending moment, shear and stress.
College & beyondCollege structural engineering
Launch simulator: Beam Deflection
Choose insulation, glazing and air-tightness for a two-storey house and compare U-values, the temperature through the wall and heat loss.
Class 6–8 · Class 11–12 · College & beyondClass 7 Science: heat (conductors and insulators); Class 11 Physics: Thermal Properties of Matter (conduction)
Launch simulator: Building Insulation
Change a signal's frequency and sampling rate, see aliasing, compare reconstructions, and see how quantization bits limit precision.
College & beyondCollege signals and systems
Launch simulator: Digital Sampling
Change tooth counts in simple and compound gear trains, and inspect rotation direction, speed ratio and ideal output torque with animated meshing gears.
Class 6–8 · College & beyondBuilds on Class 6–8 Maths: ratio and proportion
Launch simulator: Gear Trains
Trip a power station or add load, and watch the grid's frequency fall and recover through inertia, governor droop and automatic control.
College & beyondCollege power systems
Launch simulator: Grid Frequency
Edit a 3 × 3 kernel and step through convolution pixel by pixel to see how blur, sharpening and edge detection transform a small test image.
College & beyondCollege image processing
Launch simulator: Image Convolution
Tune P, I and D gains on a mass–spring–damper, add disturbances and actuator limits, and see overshoot, settling time and steady-state error.
College & beyondCollege control engineering
Launch simulator: PID Control
Charge and discharge a capacitor through a resistor, change R, C and the supply voltage, and read the time constant from the exponential curves.
Class 11–12 · College & beyondClass 12 Physics: Electrostatic Potential and Capacitance
Launch simulator: RC Circuit
Drive a series RLC circuit with an AC source, sweep the frequency, and inspect current amplitude, phase and the sharpness of resonance.
Class 11–12 · College & beyondClass 12 Physics: Alternating Current (resonance)
Launch simulator: RLC Resonance
Set joint angles or drag a target for a two-link robot arm, and explore forward and inverse kinematics, elbow-up and elbow-down, and reach.
Class 11–12 · College & beyondBuilds on Class 11 Maths: Trigonometric Functions
Launch simulator: Robot Arm
Load Pratt, Howe, Warren and A-frame trusses, change span, height and loads, and see tension and compression in every member by the method of joints.
Class 11–12 · College & beyondBuilds on Class 11 Physics: Laws of Motion (equilibrium of forces)
Launch simulator: Truss Forces
Mount a machine on springs and dampers over a shaking floor, change mass, stiffness, damping and frequency, and compare transmissibility.
Class 11–12 · College & beyondClass 11 Physics: Oscillations (forced oscillations, resonance)
Launch simulator: Vibration Isolation
Change wind speed, rotor size, air density and control, and explore turbine power with the cube law, the Betz limit and tip-speed ratio.
Class 9–10 · College & beyondBuilds on Class 9 Science: Work and Energy (kinetic energy)
Launch simulator: Wind Turbine
Follow a card transaction from the terminal through the payment switch to the issuing bank and back, including ISO 8583 messages and NCMC.
College & beyondPayments and banking systems
Launch simulator: Card Payment Switch Simulator
Simulate a serial production line, change station times, variability and buffer sizes, and find the bottleneck that sets throughput.
College & beyondCollege operations management
Launch simulator: Assembly Line
Compare who wins and what they pay in first-price, second-price, English and Dutch auctions, and test revenue equivalence over many random auctions.
College & beyondCollege economics
Launch simulator: Auction Mechanisms
Run a lift in a ten-floor building, add calls, and compare first-come-first-served, nearest-stop and sweep scheduling on waiting time and fairness.
College & beyondCollege operations research
Launch simulator: Elevator Dispatch
Run a shop's stock day by day with random demand, set the reorder point, order size and lead time, and compare stockouts and costs.
College & beyondCollege operations management
Launch simulator: Inventory Control
Shift supply and demand curves, add a tax, price ceiling, floor or quota, and see the equilibrium, consumer and producer surplus, and deadweight loss.
Class 11–12 · College & beyondClass 12 Economics: Introductory Microeconomics (demand, supply, market equilibrium)
Launch simulator: Market Supply and Demand
Edit task durations and dependencies in a building project and watch the critical path method find the project length and each task's slack.
College & beyondCollege project management
Launch simulator: Project Scheduling
Simulate random arrivals at one or more servers, change arrival and service rates, and compare queue length and waiting time with M/M/c theory.
College & beyondCollege operations research
Launch simulator: Queueing Systems
Run a four-stage supply chain, change demand and delays, and watch small changes in customer demand grow into the bullwhip effect.
College & beyondCollege operations management
Launch simulator: Supply Chain
Time a two-phase traffic signal, change green times and arrival rates, and compare measured queues and delay with Webster's formula.
College & beyondCollege transport engineering
Launch simulator: Traffic Signals
Place items to pick in a six-aisle warehouse and compare the walking distance of return, S-shape, nearest-neighbour and optimal picking routes.
College & beyondCollege operations research
Launch simulator: Warehouse Picking
Run a four-reservoir carbon cycle model from 1850 to 2200, change future emissions, and track atmospheric CO₂ and where the carbon goes.
Class 11–12 · College & beyondClass 11 Geography: World Climate and Climate Change
Launch simulator: Carbon Cycle
Change a city surface's colour, shade, vegetation and heat storage, and compare its energy balance and day–night temperatures with a park.
Class 11–12 · College & beyondClass 11 Geography: Solar Radiation, Heat Balance and Temperature
Launch simulator: Urban Heat
Change storm size and land cover for a small catchment, and compare simplified runoff curves and flood hydrographs with the SCS curve number method.
Class 9–10 · College & beyondClass 10 Geography: Water Resources
Launch simulator: Watershed Runoff