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. What is the purpose of the public schema?

2 / 20

2. What is the purpose of autovacuum?

3 / 20

3. What is another name for the postgres process?

4 / 20

4. The default Page size is 2k?

5 / 20

5. Files are logically split into pages?

6 / 20

6. TOAST tables reside in a seperate schema?

7 / 20

7. The information_schema schema provides information on Postgres release notes?

8 / 20

8. Which of below are predefined schemas?

choose 3

9 / 20

9. What is the purpose of wal writer?

10 / 20

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

11 / 20

11. What is the purpose of the postgres database?

12 / 20

12. What is the process first launched at server start?

13 / 20

13. Which of below are predefined schemas?

choose 2

14 / 20

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

15 / 20

15. Which fork contains the actual table data?

16 / 20

16. What is the purpose of the template0 database?

17 / 20

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

18 / 20

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

19 / 20

19. What is the purpose of the visibility map?

20 / 20

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

Your score is

0%

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

2 / 10

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

3 / 10

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

4 / 10

4. Which of the below are valid Isolations Levels?

choose 2

5 / 10

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

6 / 10

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

7 / 10

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

8 / 10

8. The SQL standard specifies three isolation levels?

9 / 10

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

10 / 10

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

choose 3

Your score is

0%

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

2 / 10

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

3 / 10

3. at any one time Postgres can have several versions of a row?

4 / 10

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

5 / 10

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

6 / 10

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

choose 2

7 / 10

7. Which of the below are true about a Pages Item Pointer?

8 / 10

8. If a transaction is read only which kind of Transaction ID is it allocated?

9 / 10

9. Indexes values also support multi versioning with several versions of an index value existing at any point in time?

10 / 10

10. When a transaction is committed Postgres uses a special <replace with answer> structure?

Your score is

0%