Programming Quiz Questions & Answers 2026 — Coding

Why Programming Trivia Matters

Whether you're preparing for a technical interview, a coding competition, or just love computer science — programming quiz questions test your foundational knowledge of languages, algorithms, and computing history.

Programming Languages — Key Facts

• 🐍 Python — Created by Guido van Rossum in 1991. Most popular language for AI, data science, and automation.
• 🌐 JavaScript — Created by Brendan Eich in 1995 in just 10 days. The only language that runs natively in browsers.
• ☕ Java — Created by James Gosling at Sun Microsystems in 1995. "Write once, run anywhere."
• 🦀 Rust — Created by Mozilla in 2010. Known for memory safety without garbage collection.
• 🐘 PHP — Created by Rasmus Lerdorf in 1994. Powers over 75% of all websites.
• 💎 Ruby — Created by Yukihiro Matsumoto in 1995. Famous for Ruby on Rails framework.

Computer Science Fundamentals

Data Structures

• 📚 Array — Fixed-size sequential collection; O(1) access by index.
• 🔗 Linked List — Dynamic size; O(n) access; O(1) insertion at head.
• 📦 Stack — LIFO (Last In, First Out); used for function calls and undo operations.
• 🔄 Queue — FIFO (First In, First Out); used for task scheduling.
• 🌳 Binary Tree — Hierarchical structure; each node has at most 2 children.
• #️⃣ Hash Table — Key-value pairs; O(1) average lookup; used in dictionaries/objects.

Algorithms

• 🔍 Binary Search — O(log n); searches sorted arrays by halving the search space.
• 🫧 Bubble Sort — O(n²); simple but inefficient; rarely used in production.
• ⚡ Quick Sort — O(n log n) average; most commonly used sorting algorithm in practice.
• 🔀 Merge Sort — O(n log n) guaranteed; used when stability is required.
• 🗺️ Dijkstra's Algorithm — Finds shortest path in weighted graphs.

Web Development Facts

• 🌐 HTML — HyperText Markup Language; structures web content (not a programming language).
• 🎨 CSS — Cascading Style Sheets; styles web pages.
• ⚙️ HTTP — HyperText Transfer Protocol; port 80. HTTPS uses port 443 with SSL/TLS encryption.
• 📡 REST — REpresentational State Transfer; architectural style for APIs using HTTP methods (GET, POST, PUT, DELETE).
• 🔌 WebSocket — Full-duplex communication protocol for real-time applications.

Computing History

• 💻 First computer: ENIAC (1945) — weighed 30 tonnes, filled a room.
• 🌐 Internet invented: ARPANET went live in 1969; Tim Berners-Lee invented the WWW in 1989.
• 🔵 First iPhone: Released by Apple on June 29, 2007 — revolutionized mobile computing.
• 🤖 First AI program: Logic Theorist (1956) by Allen Newell and Herbert Simon.
• 🐧 Linux kernel: Created by Linus Torvalds in 1991 — powers most servers and Android phones.

50 Programming Quiz Questions

Languages

1. What does HTML stand for? (HyperText Markup Language)
2. Which language runs in web browsers natively? (JavaScript)
3. What does CSS stand for? (Cascading Style Sheets)
4. Who created Linux? (Linus Torvalds, 1991)
5. What does SQL stand for? (Structured Query Language)

Concepts

1. What is OOP? (Object-Oriented Programming — using classes and objects)
2. What is a function that calls itself? (A recursive function)
3. What does RAM stand for? (Random Access Memory)
4. What is the binary representation of the number 10? (1010)
5. What is a Boolean? (A data type with only two values: true or false)