Data Structures and Algorithms vs A

DSA is a visual learning app for computer science students, exam prep, and self-learners. Turn abstract data structure concepts into step-by-step animations so you can actually see how algorithms work. WHY DSA • Dual-mode learning: read concept lessons first, then run interactive step-by-step visualizers • Smooth animations: pointer moves, swaps, assignments, and tree restructuring are animated with clear step descriptions • Structured curriculum: organized by textbook chapters from fundamentals to advanced topics • Full playback control: previous/next step, auto-play, speed adjustment, and scrubbing • Multilingual: Simplified Chinese, English, and more COURSE CONTENT Ch. 1 Introduction Asymptotic notation, simplification rules, time & space complexity with examples Ch. 2 Linear Lists, Stacks & Queues Linear lists, stack operations & applications, queue operations & circular queues Ch. 3 Arrays & Matrices Array basics, special matrix compression Ch. 4 Strings BF, KMP, BM string matching, algorithm complexity comparison Ch. 5 Trees Tree basics, binary tree properties & traversals BST, AVL, Splay, B-tree, Red-Black Tree, B+ Tree, Huffman Tree, Union-Find Ch. 6 Graphs Graph basics, storage structures, traversal Minimum spanning tree, shortest paths, topological sort & critical path Ch. 7 Sorting Bubble, Selection, Insertion, Shell, Merge, Quick, Heap Sort Counting, Bucket, Radix Sort Winner Tree, Loser Tree, complexity comparison WHO IT'S FOR • CS / Data Structures students • Exam prep and interview review • Self-learners building a solid DSA foundation FULL UNLOCK One-time purchase unlocks all content. No subscription. No ads. Restore purchases supported. Feedback: Settings → Email Feedback

A-Level Computer Science Revision helps you master Theory and Algorithms with original multiple-choice questions, timed mocks, algorithm-tracing drills, and clear explanations — built for focused daily study. WHY STUDENTS USE IT • 2,000+ original questions across data structures, algorithms & complexity, computational thinking, programming paradigms, computer architecture, networks, databases, Boolean algebra and theory of computation • Theory mode and Algorithms mode — switch anytime • Timed mock papers (40 questions, 50 minutes) with topic breakdown • Quick practice, practice by topic, algorithm-tracing drills, weak-area review • Review incorrect answers and bookmarks • Flashcards with spaced repetition • Progress dashboard: readiness %, topic mastery, mock trend, streak, exam countdown • Fully offline after download — no account required BUILT FOR REAL REVISION Practise the skills A-Level papers reward: tracing pseudocode, comparing Big-O, simplifying Boolean expressions, modelling networks and databases, and explaining architecture trade-offs. Every question includes a detailed rationale so mistakes become learning. SUBSCRIPTION & LIFETIME Full access requires purchase. Privacy Policy: https://joykhansayan1.github.io/alevel-computer-science-revision/privacy.html Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ DISCLAIMER Independent study aid. Not affiliated with, endorsed by, or connected to AQA, OCR, Pearson Edexcel, WJEC, CCEA, or any exam board. Original practice content only — does not reproduce official past papers. Does not guarantee any grade. © 2026 MD Shahariar Nazim Joy