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. Users should not modify the template0 database

2 / 20

2. What command is used to create the Postgres cluster?

3 / 20

3. What is the name of the catalog that stores metadata for all cluster objects?

4 / 20

4. How many rows in a page does Postgres aim to have before considering TOAST?

5 / 20

5. What is a schema?

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6. What is the purpose of wal writer?

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

8 / 20

8. A Postgres cluster consists of 2 or more physical servers accessing one Postgres Instance?

9 / 20

9. What is the purpose of autovacuum?

10 / 20

10. What is the purpose of the visibility map?

11 / 20

11. What is the default standard size for a fork file?

12 / 20

12. What is the point of the pg_global tablespace?

13 / 20

13. Postgres server spawns a new backend session for each connection?

14 / 20

14. System Catalog tables begin with which prefix?

15 / 20

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

16 / 20

16. Each tablespaces can only be assigned for use by one database

17 / 20

17. TOAST tables reside in a seperate schema?

18 / 20

18. If we create a new tablespace which directory will symbolic links be created from?

19 / 20

19. Which fork is specific for unlogged tables?

20 / 20

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

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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. What is the acronym used for the attributes that ensure Data consistency, integrity and durability?

2 / 10

2. A phantom read anomaly occurs when?

3 / 10

3. The SQL standard specifies three isolation levels?

4 / 10

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

5 / 10

5. Data Consistency is best handled at the application layer rather than at the database layer?

6 / 10

6. Based on Snapshot Isolation use of MVCC which of the below are permitted?

choose 3

7 / 10

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

8 / 10

8. What is the default Isolation Level?

9 / 10

9. Which parameters sets the database default isolation level?

10 / 10

10. Lost updates are forbidden by the standard at all 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. The page header stores checksum and the sizes of the other parts of the page?

2 / 10

2. The page header is located in the highest address?

3 / 10

3. Which 2 items does a Virtual XID consist of?

4 / 10

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

choose 2

5 / 10

5. CLOG Pages are never cached in memory?

6 / 10

6. Information about subtransactions is stored under?

7 / 10

7. To identify different versions of one and the same row, PostgreSQL marks each of them with which two value?

8 / 10

8. CLOG contains how many bits for each transaction?

9 / 10

9. psql provides a special mode that allows you to continue a transaction after a failure?

10 / 10

10. What does an Item Pointer contain?

choose 3

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