1. Which PostgreSQL isolation level provides the highest level of isolation but may lead to more concurrency issues?
2. What is the purpose of the pg_repack extension in PostgreSQL?
3. What is the primary benefit of using the SERIAL data type in PostgreSQL for creating auto-incrementing columns?
4. In PostgreSQL, what is the role of the pg_stat_activity view?
5. Which statement is used to remove a table and its associated data from a PostgreSQL database?
6. What is the purpose of the pg_basebackup utility in PostgreSQL?
7. Which PostgreSQL feature allows you to define custom data types?
8. Which statement is used to change the ownership of a PostgreSQL database object, such as a table?
9. What is the purpose of the pg_stat_replication view in PostgreSQL?
10. Which PostgreSQL configuration parameter controls the maximum number of concurrent connections to the database server?
11. In PostgreSQL, what is the role of the pg_stat_bgwriter view?
12. What is the purpose of the pg_bouncer tool in PostgreSQL?
13. Which PostgreSQL command is used to rename a table?
14. In PostgreSQL, what is the purpose of the pg_locks view?
15. What is the purpose of the pg_wal directory in PostgreSQL?