Build robust, distributed leaderboards with Cloud Firestore quiz

1. Why might you choose a stochastic leaderboard over an exact leaderboard?

   Choose as many answers as you see fit.

   A stochastic leaderboard is generally faster when reading ranks.

   A stochastic leaderboard allows faster rank updates than a periodically-updating exact leaderboard.

   A stochastic leaderboard always requires fewer document updates per new score than a periodically-updating exact leaderboard.

   A stochastic leaderboard generally suffers from higher lock contention than other leaderboard implementations.

2. In which situation would a simple leaderboard with all scores stored in a flat Cloud Firestore collection be most ideal?

   A long, slow game with few new high scores, frequent leaderboard reads, and a large number of players.

   A long, slow game with few new high scores, infrequent leaderboard reads, and a small number of players.

   A short, fast game with many new high scores, frequent leaderboard reads, and a large number of players.

   A short, fast game with many new high scores, infrequent leaderboard reads, and a large number of players.

3. What is the average case complexity of the tree leaderboard for the addition and retrieval of scores where n is the number of scores in the leaderboard?

   O(log n)

   O(n)

   O(n * log n)

   O(1)

4. Generally, which leaderboard requires the fewest reads and writes to fetch and create scores for a large leaderboard?

   A simple leaderboard

   A periodically-updating leaderboard

   A tree leaderboard

   A stochastic leaderboard

5. What is the only leaderboard that does not allow for real-time updates?

   A simple leaderboard

   A periodically-updating leaderboard

   A tree leaderboard

   A stochastic leaderboard

6. Fill-in-the-blanks

   Enter one or more words to complete the sentence.

   Test Fill in the blanks with two fields ___, and field --- number 2

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