The word hackathon combines hack with which other word?
AnswerMarathon
Hackathon blends hack and marathon, reflecting long, focused building sessions.
Coding · Facts & stats
Challenge Hack facts & stats
7 fact-checked facts about hackathons and coding challenges, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
What is an algorithm?
AnswerA step-by-step procedure for solving a problem
An algorithm is a finite set of clear steps that solves a problem or completes a task.
Going deeper
In cybersecurity competitions, what does CTF stand for?
AnswerCapture the Flag
In Capture the Flag contests, players solve security puzzles to find hidden flags.
What does Big O notation describe?
AnswerHow an algorithm's running time or memory grows with input size
Big O notation expresses how resource use scales as input grows.
In 1947, what was found in the Harvard Mark II computer and taped into its logbook as a "bug"?
AnswerA moth
Operators logged the moth as the "first actual case of bug being found."
Expert level
What is the minimum number of moves to solve the Tower of Hanoi with 3 disks?
Answer7
The minimum is 2 to the power of n minus 1; for 3 disks that is 7.
What does Dijkstra's algorithm find?
AnswerShortest paths in a graph with non-negative edge weights
Edsger Dijkstra's 1956 algorithm finds shortest paths from a starting node.
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