💻 Coding Interview Quiz

💻 How to Play Coding Quiz

Coding Quiz is a technical knowledge game covering topics essential for software engineering interviews and day-to-day development. Each game consists of 10 multiple-choice questions from your chosen topic: Data Structures & Algorithms, JavaScript, Python, SQL, or System Design. Select one of the four options before the timer expires. After each question, a detailed explanation is shown — even for correct answers — to deepen your understanding.

Questions range from beginner concepts (array indexing, basic SQL queries) to intermediate topics (Big-O complexity, closures, database normalisation). Your final score shows the percentage correct and a performance grade. Use “Change Topic” to switch subjects for your next round.

Topics Covered

• Data Structures & Algorithms: Arrays, linked lists, trees, sorting algorithms, time complexity (Big-O notation).
• JavaScript: Closures, prototypes, event loop, promises, ES6+ features, DOM manipulation.
• Python: List comprehensions, decorators, generators, OOP, built-in functions.
• SQL: Joins, subqueries, GROUP BY, indexing, ACID properties, normalisation.
• System Design: Load balancing, caching, CAP theorem, microservices, database sharding.

Interview Prep Tips

Technical interviews at major companies test both breadth (can you name concepts) and depth (can you explain trade-offs). Play this quiz regularly to build pattern recognition across topic areas. Read every explanation even when you answer correctly — understanding the why behind an answer prepares you to handle follow-up questions in real interviews. Aim for 80%+ accuracy across all 5 topics before your next interview.

Study Guide

Use the Coding Quiz Study Guide to turn each 10-question round into a focused active-recall routine for DSA, JavaScript, Python, SQL, OOP, and system design.