Computer Science
Computer science: operating systems, networks, pioneers, and the machines that started it all
All 1,000 questions in this category are free to play.
Sign in to start this quizSample questions
Tap an answer to check yourself. Every answer comes with an explanation.
1. What is the name of the open-source operating system kernel created by Linus Torvalds in 1991?
2. Which company developed the Android mobile operating system before it was acquired and further developed by Google?
3. Which company created the Windows operating system's main rival in the 1980s personal computer market, known for the Macintosh?
4. Which company launched the streaming service and later original-content producer Netflix, initially as a DVD-by-mail rental service?
5. What is the name of the technology that allows different computer programs to communicate with each other, commonly abbreviated as an interface for software?
All 1,000 questions in this category are free to play.
Difficulty that adapts to you
Every question and every player carries an ELO rating, the same system chess uses. Answer correctly and you face harder questions; miss a few and the quiz eases off. That keeps practice in the productive zone - challenging enough to learn from, never so hard it stops being useful.
Each answer shows an instant explanation of what was right and wrong, so a quiz session doubles as a study session.