Bite-size lessons, hands-on practice after every concept, and an AI tutor that explains the why on every single question.
Every course is built the same way — read a little, practise a lot, and get an explanation the moment you get something wrong.
PythonLearn Python online with 3,400+ free practice MCQs — from variables and control flow through OOP, concurrency, memory, performance, and interview traps.…
GenAI Engineering: Prompt EngineeringMaster prompt engineering with 1,400+ free practice MCQs — zero/few-shot, chain of thought, ReAct, structured output, prompt injection. Instant explanations.
GenAI Engineering: Agents & MasteryMaster AI Agents with 1,600+ free practice MCQs — tool calling, ReAct, multi-agent, memory, MCP & A2A, agent safety. Instant explanations.
Go Concurrency & Advanced Patterns1,300+ free MCQs on Go concurrency — goroutines, channels, select, sync primitives, context, the memory model, and race patterns. Instant explanations.
C: Pointers & Memory MasteryDrill C pointers and memory with 1,300+ free MCQs — multi-level pointers, function pointers, dynamic allocation, struct padding, UB, and safe patterns.
GenAI Engineering: RAG SystemsMaster Retrieval-Augmented Generation with 1,500+ free practice MCQs — chunking, embeddings, hybrid retrieval, reranking, eval. Instant explanations.
HTML & CSS for Frontend Interviews1,000+ free MCQs on HTML & CSS for frontend interviews — semantics, accessibility, Flexbox, Grid, modern CSS. Instant explanations after every wrong answer.
Next.js FundamentalsLearn Next.js with 1,200+ free MCQs — App Router, Server Components, Server Actions, caching, and SEO. Instant explanations after every wrong answer.
Python Interview MasteryCrack Python interviews with 900+ free MCQs focused on traps, edge cases, and internals — instant explanations after every wrong answer.
GenAI Engineering: LLM FoundationsMaster Large Language Models with 1,700+ free practice MCQs — tokenization, transformers, decoding, alignment. Instant explanations on every wrong answer.
DSA — Interview Mastery Practice interview-mastery DSA with 1,500+ free MCQs — segment trees, Fenwick trees, string algorithms, probabilistic DS, advanced heaps, number theory, edge cases, complexity trade-offs, archetypes, and anti-patterns. The DSA capstone.
DSA — Dynamic Programming & Graphs Practice DP and graph algorithms online with 1,500+ free MCQs — state definition, 1D and 2D DP, Knapsack, sequence DP, shortest paths, MST, topological sort, and advanced graph algorithms. Hard-interview ready.
DSA — Algorithms & Core Patterns Practice DSA algorithms online with 1,700+ free MCQs — sorting, binary search, recursion, backtracking, greedy, two-pointer, sliding window, prefix sums, BFS/DFS, monotonic stack, and bit manipulation. Pattern-driven, interview-ready prep.
DSA: Data Structures FundamentalsPractice data structures online with 1,400+ free MCQs — from arrays and hashmaps through linked lists, trees, heaps, tries, and graphs. Instant explanations on every wrong answer; FAANG, GATE, and campus-placement ready.
TypeScript FundamentalsPractice TypeScript online with 1,600+ free MCQs — from type annotations and interfaces through generics, utility types, narrowing, and tsconfig. Instant explanations on every wrong answer; React, Node, and interview-ready prep.
Spring Boot: Security & AdvancedMaster Spring Boot Security & advanced topics with 1,600+ free practice MCQs — Spring Security, JWT, OAuth2, Actuator, caching, async, Kafka & RabbitMQ.…
C Programming FundamentalsPractice C programming online with 1,800+ free MCQs — from basics and operators through pointers, dynamic memory, structures, and file I/O. Instant…
Logical ReasoningPractice logical reasoning online with 3,300+ free MCQs — from series, coding, and blood relations through seating, puzzles, and critical reasoning.…
Spring Boot FundamentalsLearn Spring Boot from scratch with 1,500+ free practice MCQs — IoC and DI, beans, auto-configuration, REST controllers, Spring Data JPA, exception…
C++ Templates & AdvancedMaster advanced C++ templates with 1,400+ free MCQs — type deduction, specialization, variadic templates, SFINAE, type traits, C++20 concepts, CRTP…
C++ STL MasteryMaster the C++ Standard Template Library with 1,400+ free practice MCQs — vector, deque, set, map, unordered_map, stack, priority_queue, iterators…
C++ FundamentalsMaster the fundamentals of C++ with hands-on practice covering syntax, OOP, memory management, and the STL.
C++ Modern FeaturesMaster modern C++ with 2,000+ free practice MCQs — auto, lambdas, move semantics, smart pointers, constexpr, std::optional, std::variant, structured…
Java OOP & Design PatternsMaster Java OOP and Design Patterns with 1,600+ free practice MCQs — SOLID, polymorphism, inheritance vs composition, the GoF creational, structural, and…
Two-minute concepts. No walls of text, no 40-minute videos.
Every concept ends in questions. Instant feedback, always.
Stuck on a question? Get the reasoning, not just the answer.
Keep the streak alive and finish with something to show.
Miss a question and the tutor picks apart your reasoning — the concept behind it, the trap you fell into, and one more question to prove you've got it.
Not a canned answer key — reasoning tailored to the option you picked.
Anything you fumble comes back later, spaced out, until it sticks.
Topic-level mastery, XP, streaks and a certificate at the end.
typeof null return in JavaScript?Close — but typeof null is "object", a bug kept since 1995 for backwards compatibility. Use value === null to test for it.
Every completed course issues a verifiable certificate with a unique code and QR — ready for LinkedIn, your résumé and recruiters.
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Issued the moment you finish the course — no fees, no waiting.
Start with any course, keep the streak alive, and let the tutor handle the parts that don't click.
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