Postgres Quiz Archive

You have 200 seconds to answer 20 Random questions so think fast!

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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 template1 database?

2 / 20

2. Which of below are predefined schemas?

choose 2

3 / 20

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

4 / 20

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

5 / 20

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

6 / 20

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

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

8 / 20

8. How does Postgres know which schema to use if not specified?

9 / 20

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

10 / 20

10. What is the purpose of the template0 database?

11 / 20

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

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12. It is the postmasters job to listener for incoming connections?

13 / 20

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

choose 3

14 / 20

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

15 / 20

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

16 / 20

16. What is the purpose of the public schema?

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

18 / 20

18. What is the purpose of wal writer?

19 / 20

19. What is another name for the postgres process?

20 / 20

20. What is the name of the system catalog table for relations?

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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 parameters sets the database default isolation level?

2 / 10

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

choose 3

3 / 10

3. non-repeatable read anomaly occurs when?

4 / 10

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

5 / 10

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

6 / 10

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

7 / 10

7. What is the default Isolation Level?

8 / 10

8. Which of the below are valid Isolations Levels?

choose 2

9 / 10

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

Select more than 1 answer below:

10 / 10

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

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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. What does an Item Pointer contain?

choose 3

2 / 10

2. The page header stores checksum and the sizes of the other parts of the page?

3 / 10

3. Page free space can often become fragmented?

4 / 10

4. Page header sizes can be easily displayed using the <choose from answers> extension

5 / 10

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

6 / 10

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

7 / 10

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

8 / 10

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

9 / 10

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

10 / 10

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

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