PostgreSQL Associate Database Architecture Quiz

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| Questions: 20 | Updated: Aug 11, 2026
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1. Which command is used to remove dead tuples and reclaim space in PostgreSQL?

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About This Quiz
PostgreSQL Associate Database Architecture Quiz - Quiz

This quiz evaluates your understanding of PostgreSQL database architecture, core concepts, and practical implementation. Designed for college-level learners, it covers storage structures, transaction management, query optimization, and system administration. Master the foundational knowledge needed for PostgreSQL certification and advanced database work.

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2. What does the pg_control file in PostgreSQL contain?

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3. In PostgreSQL, what is the purpose of a relation file?

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4. Which PostgreSQL storage format is used for large objects?

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5. What is the purpose of the commit log (CLOG) in PostgreSQL?

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6. In PostgreSQL, what does the shared buffer cache store?

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7. What is a B-tree index in PostgreSQL?

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8. Which PostgreSQL process is responsible for removing old transaction IDs?

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9. In PostgreSQL, what does the visibility map track?

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10. What is the purpose of the pg_xact directory in PostgreSQL?

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11. What is the primary function of the WAL (Write-Ahead Log) in PostgreSQL?

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12. In PostgreSQL, what is a heap?

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13. What does the CHECKPOINT command do in PostgreSQL?

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14. Which PostgreSQL process is responsible for writing dirty pages to disk?

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15. In PostgreSQL, what does a toast table store?

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16. What is the default page size in PostgreSQL?

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17. Which isolation level in PostgreSQL prevents dirty reads but allows phantom reads?

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18. What is the smallest unit of storage in PostgreSQL?

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19. In PostgreSQL, what does MVCC stand for?

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20. Which PostgreSQL component is responsible for parsing SQL statements?

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Which command is used to remove dead tuples and reclaim space in...
What does the pg_control file in PostgreSQL contain?
In PostgreSQL, what is the purpose of a relation file?
Which PostgreSQL storage format is used for large objects?
What is the purpose of the commit log (CLOG) in PostgreSQL?
In PostgreSQL, what does the shared buffer cache store?
What is a B-tree index in PostgreSQL?
Which PostgreSQL process is responsible for removing old transaction...
In PostgreSQL, what does the visibility map track?
What is the purpose of the pg_xact directory in PostgreSQL?
What is the primary function of the WAL (Write-Ahead Log) in...
In PostgreSQL, what is a heap?
What does the CHECKPOINT command do in PostgreSQL?
Which PostgreSQL process is responsible for writing dirty pages to...
In PostgreSQL, what does a toast table store?
What is the default page size in PostgreSQL?
Which isolation level in PostgreSQL prevents dirty reads but allows...
What is the smallest unit of storage in PostgreSQL?
In PostgreSQL, what does MVCC stand for?
Which PostgreSQL component is responsible for parsing SQL statements?
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