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 name of the system catalog table for relations?

2 / 20

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

3 / 20

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

choose 3

4 / 20

4. System Catalog tables begin with which prefix?

5 / 20

5. Which fork contains the actual table data?

6 / 20

6. Which fork is specific for unlogged tables?

7 / 20

7. Users should not modify the template0 database

8 / 20

8. What is the purpose of the template0 database?

9 / 20

9. When PostgreSQL is running what can it be referred to as?

Choose 2 option

10 / 20

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

11 / 20

11. Postgres uses a thread based process model?

12 / 20

12. What is another name for the postgres process?

13 / 20

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

14 / 20

14. Which 3 databases exist directly after cluster initialization?

choose 3 options

15 / 20

15. What is the purpose of the template1 database?

16 / 20

16. What is a schema?

17 / 20

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

18 / 20

18. What is the purpose of the visibility map?

19 / 20

19. What is the purpose of the public schema?

20 / 20

20. How many files or forks on disk will a 10Mb table with no index have?

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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. The SQL standard specifies three isolation levels?

2 / 10

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

3 / 10

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

choose 3

4 / 10

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

5 / 10

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

Select more than 1 answer below:

6 / 10

6. What is the default Isolation Level?

7 / 10

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

8 / 10

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

9 / 10

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

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

2 / 10

2. Information about subtransactions is stored under?

3 / 10

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

4 / 10

4. What does an Item Pointer contain?

choose 3

5 / 10

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

6 / 10

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

7 / 10

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

8 / 10

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

9 / 10

9. CLOG files are stored in which directory?

10 / 10

10. Page free space can often become fragmented?

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