Algorithms Interview Trainer — 512 Junior & Middle Q&A

📖 Algorithms Interview Trainer is an interactive, educational mobile application designed to help software engineers, computer science students, and tech job seekers master Data Structures and Algorithms (DSA). Packed with 512 comprehensive questions and answers (256 Junior & 256 Middle), this app is your ultimate companion whether you are preparing for coding screens, technical whiteboard rounds, FAANG/Big Tech interviews, or university exams.

Don't just memorize LeetCode solutions — understand the underlying algorithmic patterns, trade-offs, and computational complexity. Our structured, code-rich database bridges the gap between passive reading and the sharp problem-solving intuition required to pass real technical interviews.

📚 Core Topics Covered

• ⏱️ Big-O Notation & Complexity Analysis
• 🧱 Arrays, Strings & Hash Tables
• 🔗 Linked Lists, Stacks & Queues
• 🪟 Two Pointers & Sliding Window
• 🔍 Sorting & Binary Search
• 🌳 Trees, BST & Tries
• 📊 Heaps & Graph Algorithms
• 🧩 Dynamic Programming & Backtracking

🌟 Key Features

• 🎯 Interview-Focused Curriculum (512 Q&A): Practice with 256 Junior-level and 256 Middle-level questions with detailed explanations, accurately simulating real-world algorithmic assessments and coding screens.
• 📚 Interactive Study Mode: Browse through questions categorized by DSA patterns. Each question includes step-by-step logic, optimal time and space complexity ($O(1)$, $O(N)$, $O(N \log N)$), edge cases, and pseudocode/code snippets.
• 🚀 Customizable Mock Interviews: Tailor your training session! Choose your target difficulty level (Junior or Middle) and configure exactly how many questions to pull randomly from each topic.
• ⏱️ Exam Simulation Mode: Train yourself under real-world pressure with a configurable countdown timer, structured question sets, and a comprehensive final review.
• 📊 Categorical Performance Analytics: Pinpoint your algorithmic weak spots. Track your progress, review past tests in the 'Best Scores' tab, and see which topics (e.g., Dynamic Programming, Graphs, or Sliding Window) require further review.
• 🏆 Achievements & Streaks: Stay consistent throughout your interview prep. Build daily learning habits with streak trackers and unlock milestone badges as your scores improve.
• ⚙️ User-Friendly Customization: Train comfortably with native support for 5 languages (English, Ukrainian, German, Spanish, and French), haptic feedback, dark/light themes, and custom font scaling.

📲 How to Install on Android

1. Download the signed .apk file from this page.
2. Open the downloaded file on your Android device.
3. If prompted, allow your browser or file manager to "Install apps from unknown sources".
4. Follow the on-screen prompts to finish the installation and start practicing!