Tech Quest: Gadgets, Games & Gizmos Trivia

Dive into a fun tech quiz for curious kids 12+! Test your smarts on gadgets, coding, and cool inventions — can you beat the leaderboard?

  1. What does 'CPU' stand for in computers?
    1. Central Peripheral Unit
    2. Computer Performance Unit
    3. Central Processing Unit
    4. Core Processing Utility
  2. Which of the following is a non-volatile storage type: RAM, SSD, or CPU cache?
    1. Registers
    2. RAM
    3. CPU cache
    4. SSD
  3. Why do wireless routers use different frequency bands like 2.4 GHz and 5 GHz?
    1. To enable Bluetooth pairing
    2. Trade-offs in range and speed
    3. To increase battery life
    4. To comply with GPS standards
  4. Who is credited with inventing the World Wide Web in 1989?
    1. Bill Gates
    2. Vint Cerf
    3. Tim Berners-Lee
    4. Marc Andreessen
  5. What is Moore's Law about in relation to computer chips?
    1. Processor clock speed doubling
    2. Transistor density doubling
    3. Memory capacity doubling
    4. Chip physical size shrinking
  6. Which programming language is commonly used to create interactive web pages in browsers?
    1. Python
    2. JavaScript
    3. Java
    4. Ruby
  7. Why do touchscreen devices use capacitive touch instead of resistive touch for most smartphones?
    1. Works with gloves
    2. Lower manufacturing cost
    3. Better pressure detection
    4. Higher sensitivity
  8. Which company introduced the first popular mass-market smartphone called the iPhone in 2007?
    1. Microsoft
    2. Nokia
    3. BlackBerry (Research In Motion)
    4. Apple

Answers and explanations

  1. Question: What does 'CPU' stand for in computers?
    Answer: Central Processing Unit
    Explanation: The CPU (Central Processing Unit) is the primary component that executes instructions and performs calculations in a computer — often called the "brain" of the machine. Fun fact: modern CPUs can contain billions of transistors and multiple cores, allowing them to run many tasks simultaneously and be
  2. Question: Which of the following is a non-volatile storage type: RAM, SSD, or CPU cache?
    Answer: SSD
    Explanation: An SSD (Solid State Drive) stores data persistently even when power is removed, making it non-volatile. SSDs are important because they provide fast, durable long-term storage for operating systems, applications, and files compared with traditional hard drives.
  3. Question: Why do wireless routers use different frequency bands like 2.4 GHz and 5 GHz?
    Answer: Trade-offs in range and speed
    Explanation: Routers use different bands because lower frequencies (2.4 GHz) travel farther and penetrate walls better, while higher frequencies (5 GHz) support faster data rates and less interference. This trade-off lets devices choose the band that best balances coverage and performance for their needs.
  4. Question: Who is credited with inventing the World Wide Web in 1989?
    Answer: Tim Berners-Lee
    Explanation: Tim Berners-Lee, a British computer scientist at CERN, proposed the World Wide Web in 1989 to link and share research documents using hypertext. Fun fact: he also invented the first web browser and server and later founded the World Wide Web Consortium (W3C) to standardize web technologies.
  5. Question: What is Moore's Law about in relation to computer chips?
    Answer: Transistor density doubling
    Explanation: Moore's Law observes that the number of transistors on a computer chip roughly doubles about every two years, driving exponential increases in processing power and efficiency. This trend has guided semiconductor development for decades and explains why devices became faster, cheaper, and more energy
  6. Question: Which programming language is commonly used to create interactive web pages in browsers?
    Answer: JavaScript
    Explanation: JavaScript is the standard scripting language for the web, enabling interactive features like dynamic content updates, form validation, and animations directly in the browser. Fun fact: despite its name, JavaScript is unrelated to Java and was originally created in just 10 days in 1995.
  7. Question: Why do touchscreen devices use capacitive touch instead of resistive touch for most smartphones?
    Answer: Higher sensitivity
    Explanation: Capacitive touchscreens detect the electrical properties of your finger, allowing for faster, more accurate, multi-touch input and clearer displays without needing pressure. This matters because it enables smooth gestures, pinch-to-zoom, and more responsive user interfaces that define modern smart‑s
  8. Question: Which company introduced the first popular mass-market smartphone called the iPhone in 2007?
    Answer: Apple
    Explanation: Apple introduced the first widely popular mass-market smartphone, the iPhone, in 2007, which revolutionized mobile computing by combining a multi-touch screen, apps, and a sleek consumer design. Fun fact: the original iPhone lacked third-party apps at launch — the App Store arrived a year later and迅