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. Files are logically split into pages?

2 / 20

2. What is the purpose of the visibility map?

3 / 20

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

4 / 20

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

5 / 20

5. The pg_default tablespace should never be used to create user tables?

6 / 20

6. What is the purpose of wal writer?

7 / 20

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

8 / 20

8. Which 3 databases exist directly after cluster initialization?

choose 3 options

9 / 20

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

10 / 20

10. A schema can belong to more than one database?

11 / 20

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

12 / 20

12. System Catalog tables begin with which prefix?

13 / 20

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

14 / 20

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

15 / 20

15. What is the name of the mechanism used to store a row bigger than a page size?

16 / 20

16. What is the point of the pg_global tablespace?

17 / 20

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

18 / 20

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

choose 3

19 / 20

19. What is the purpose of the template0 database?

20 / 20

20. What column in system catalogs servers as the Primary Key

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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. Which isolation level in theory could mean an application does not have to consider isolation anomalies?

2 / 10

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

3 / 10

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

4 / 10

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

5 / 10

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

6 / 10

6. Which parameters sets the database default isolation level?

7 / 10

7. Which of the below are valid Isolations Levels?

choose 2

8 / 10

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

9 / 10

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

10 / 10

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

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

2 / 10

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

3 / 10

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

4 / 10

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

5 / 10

5. status of a subtransaction is written into CLOG?

6 / 10

6. a transaction containing a savepoint is will still be considered as only a single transaction?

7 / 10

7. Information about subtransactions is stored under?

8 / 10

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

choose 2

9 / 10

9. CLOG contains how many bits for each transaction?

10 / 10

10. indexes do not use row versioning?

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