1. What is Session store ? Junior A. coordinating exclusive access across processes by atomically setting a uniquely-tagged key with an expiry to avoid deadlock B. a unique random value stored with a mutual-exclusion key so only the holder can safely release it and never another client's C. capping how many actions a client may perform in a window by atomically incrementing a counter that expires D. keeping per-user web session state in memory with automatic lifespan so logins expire without manual cleanup
2. Which term means: "keeping per-user web session state in memory with automatic lifespan so logins expire without manual cleanup"? Junior A. Rate limiting B. Session store C. Leaderboard D. Distributed lock
3. Which statement is correct? Junior A. Session store — capping how many actions a client may perform in a window by atomically incrementing a counter that expires B. Session store — a unique random value stored with a mutual-exclusion key so only the holder can safely release it and never another client's C. Session store — keeping per-user web session state in memory with automatic lifespan so logins expire without manual cleanup D. Session store — ranking players or items by score using a structure that returns top-N and individual rank in logarithmic time
4. What is Leaderboard ? Mid A. keeping per-user web session state in memory with automatic lifespan so logins expire without manual cleanup B. capping how many actions a client may perform in a window by atomically incrementing a counter that expires C. ranking players or items by score using a structure that returns top-N and individual rank in logarithmic time D. coordinating exclusive access across processes by atomically setting a uniquely-tagged key with an expiry to avoid deadlock
5. Which term means: "ranking players or items by score using a structure that returns top-N and individual rank in logarithmic time"? Mid A. Lock ownership token B. Distributed lock C. Session store D. Leaderboard
6. Which statement is correct? Mid A. Leaderboard — a unique random value stored with a mutual-exclusion key so only the holder can safely release it and never another client's B. Leaderboard — coordinating exclusive access across processes by atomically setting a uniquely-tagged key with an expiry to avoid deadlock C. Leaderboard — capping how many actions a client may perform in a window by atomically incrementing a counter that expires D. Leaderboard — ranking players or items by score using a structure that returns top-N and individual rank in logarithmic time
7. What is Rate limiting ? Mid A. ranking players or items by score using a structure that returns top-N and individual rank in logarithmic time B. a unique random value stored with a mutual-exclusion key so only the holder can safely release it and never another client's C. capping how many actions a client may perform in a window by atomically incrementing a counter that expires D. coordinating exclusive access across processes by atomically setting a uniquely-tagged key with an expiry to avoid deadlock
8. Which term means: "capping how many actions a client may perform in a window by atomically incrementing a counter that expires"? Mid A. Lock ownership token B. Distributed lock C. Session store D. Rate limiting
9. Which statement is correct? Mid A. Rate limiting — a unique random value stored with a mutual-exclusion key so only the holder can safely release it and never another client's B. Rate limiting — coordinating exclusive access across processes by atomically setting a uniquely-tagged key with an expiry to avoid deadlock C. Rate limiting — capping how many actions a client may perform in a window by atomically incrementing a counter that expires D. Rate limiting — ranking players or items by score using a structure that returns top-N and individual rank in logarithmic time
10. What is Distributed lock ? Senior A. capping how many actions a client may perform in a window by atomically incrementing a counter that expires B. ranking players or items by score using a structure that returns top-N and individual rank in logarithmic time C. a unique random value stored with a mutual-exclusion key so only the holder can safely release it and never another client's D. coordinating exclusive access across processes by atomically setting a uniquely-tagged key with an expiry to avoid deadlock
11. Which term means: "coordinating exclusive access across processes by atomically setting a uniquely-tagged key with an expiry to avoid deadlock"? Senior A. Session store B. Lock ownership token C. Rate limiting D. Distributed lock
12. Which statement is correct? Senior A. Distributed lock — coordinating exclusive access across processes by atomically setting a uniquely-tagged key with an expiry to avoid deadlock B. Distributed lock — a unique random value stored with a mutual-exclusion key so only the holder can safely release it and never another client's C. Distributed lock — ranking players or items by score using a structure that returns top-N and individual rank in logarithmic time D. Distributed lock — capping how many actions a client may perform in a window by atomically incrementing a counter that expires
13. What is Lock ownership token ? Senior A. capping how many actions a client may perform in a window by atomically incrementing a counter that expires B. ranking players or items by score using a structure that returns top-N and individual rank in logarithmic time C. coordinating exclusive access across processes by atomically setting a uniquely-tagged key with an expiry to avoid deadlock D. a unique random value stored with a mutual-exclusion key so only the holder can safely release it and never another client's
14. Which term means: "a unique random value stored with a mutual-exclusion key so only the holder can safely release it and never another client's"? Senior A. Leaderboard B. Rate limiting C. Lock ownership token D. Session store
15. Which statement is correct? Senior A. Lock ownership token — capping how many actions a client may perform in a window by atomically incrementing a counter that expires B. Lock ownership token — keeping per-user web session state in memory with automatic lifespan so logins expire without manual cleanup C. Lock ownership token — a unique random value stored with a mutual-exclusion key so only the holder can safely release it and never another client's D. Lock ownership token — coordinating exclusive access across processes by atomically setting a uniquely-tagged key with an expiry to avoid deadlock