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. Which fork keeps track of available space within pages?

2 / 20

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

3 / 20

3. Which of below are predefined schemas?

choose 2

4 / 20

4. Which fork contains the actual table data?

5 / 20

5. What is a schema?

6 / 20

6. Which of below are predefined schemas?

choose 3

7 / 20

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

8 / 20

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

9 / 20

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

10 / 20

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

11 / 20

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

12 / 20

12. What is the purpose of the template0 database?

13 / 20

13. What is the purpose of the visibility map?

14 / 20

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

15 / 20

15. System Catalog tables begin with which prefix?

16 / 20

16. What is the point of the pg_global tablespace?

17 / 20

17. What is the purpose of wal writer?

18 / 20

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

19 / 20

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

20 / 20

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

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

3 / 10

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

4 / 10

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 would best describe a dirty read?

7 / 10

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

8 / 10

8. What are some of database features we can use to avoid a non repeatable read?

Select more than 1 answer below:

9 / 10

9. The SQL standard specifies three isolation levels?

10 / 10

10. Which of the below are valid Isolations Levels?

choose 2

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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. Page free space can often become fragmented?

2 / 10

2. When a row is created, its xmin value is set to the transaction ID of which command?

3 / 10

3. In Postgres, tables are often referred to as which of the below?

4 / 10

4. Postgres table physical data files are always cross compatible across platforms?

5 / 10

5. CLOG contains how many bits for each transaction?

6 / 10

6. What does an Item Pointer contain?

choose 3

7 / 10

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

choose 2

8 / 10

8. The page Special Space is located at the start of the page with highest address

9 / 10

9. Information about subtransactions is stored under?

10 / 10

10. CLOG Pages are never cached in memory?

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