Postgres Quiz Archive

You have 200 seconds to answer 20 Random questions so think fast!

You will need to score 80% or over to pass!

Created by Paul Sammy

PostgreSQL 14 Internals Chapter 1

A quiz to test the knowledge of those reading and learning from Postgres 14 Internals book by Egor Rogov, covering topics in Chapter 1.

1 / 20

1. A single Postgres Instance can server only one database?

2 / 20

2. What 3 files/forks as a minimum make up a table on disk?

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3. Some System Catalog tables are common to all databases in the cluster?

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4. Postgres by default has built in connection pooling abilities?

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5. Each Database has its own System Catalog?

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6. Tablespaces can be used to segregate data based on performance needs?

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7. What is the purpose of the postgres database?

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8. To understand each other, a client and a server must use one and the same interfacing protocol?

9 / 20

9. What is a schema?

10 / 20

10. Which of the below objects can be referred to as relations?

choose 3

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11. What is the purpose of the template0 database?

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12. Which fork keeps track of available space within pages?

13 / 20

13. What is the purpose of autovacuum?

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14. Which of below are predefined schemas?

choose 3

15 / 20

15. To be able to restore data consistency, Postgres maintains

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16. What is the name of the directory that contains the files related to the Postgres cluster?

17 / 20

17. What is another name for the postgres process?

18 / 20

18. What is the point of the pg_global tablespace?

19 / 20

19. Which 3 databases exist directly after cluster initialization?

choose 3 options

20 / 20

20. What is the purpose of the visibility map?

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Created by Paul Sammy

PostgreSQL 14 Internals Chapter 2

A quiz to test the knowledge of those reading and learning from Postgres 14 Internals book by Egor Rogov, covering topics in Chapter 2.

1 / 10

1. Lost updates are forbidden by the standard at all isolation levels?

2 / 10

2. Which of the below would best describe a dirty read?

3 / 10

3. Which of the below are valid Isolations Levels?

choose 2

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4. What is the default Isolation Level?

5 / 10

5. The more locks a transaction acquires, the better it is isolated from other transactions?

6 / 10

6. which of the below statements will start a transaction as Read Repeatable?

7 / 10

7. Snapshot isolation is preferred but increases the number of required locks?

8 / 10

8. At any moment the database system can contain several versions of one and the same row?

9 / 10

9. A phantom read anomaly occurs when?

10 / 10

10. The SQL standard specifies three isolation levels?

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Created by Paul Sammy

PostgreSQL 14 Internals Chapter 3

A quiz to test the knowledge of those reading and learning from Postgres 14 Internals book by Egor Rogov, covering topics in Chapter 3.

1 / 10

1. Tuples can also be referred to as columns?

2 / 10

2. Rows of TOAST tables are handled in such a way that they are never update?

3 / 10

3. Which 2 of the below represent transaction IDs used for row versioning?

4 / 10

4. Each page has a layer that usually consists of?

choose 2

5 / 10

5. CLOG files are stored in which directory?

6 / 10

6. index row headers like table row headers contain xmin and xmax fields?

7 / 10

7. virtual IDs exist only in PGDATA/pg_vxid when not cached?

8 / 10

8. UPDATE can be regarded as which 2 separate operations?

9 / 10

9. Page header sizes can be easily displayed using the <choose from answers> extension

10 / 10

10. The page header stores checksum and the sizes of the other parts of the page?

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