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. pg_catalog schema is used to store system catalog tables?

2 / 20

2. Users should not modify the template0 database

3 / 20

3. What is the purpose of autovacuum?

4 / 20

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

5 / 20

5. What is the name of the 2 default tablespaces created after initialization?

choose 2

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6. To be able to restore data consistency, Postgres maintains

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

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

9 / 20

9. What is the purpose of the visibility map?

10 / 20

10. Tablespaces can be used to segregate data based on performance needs?

11 / 20

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

12 / 20

12. What is another name for the postgres process?

13 / 20

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

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14. What is the purpose of the template0 database?

15 / 20

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

choose 3

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16. Tablespaces are used to define physical data layout?

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17. The default Page size is 2k?

18 / 20

18. What is the point of the pg_global tablespace?

19 / 20

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

20 / 20

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

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

2 / 10

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

choose 3

3 / 10

3. Which of the below are valid Isolations Levels?

choose 2

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

Select more than 1 answer below:

5 / 10

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

6 / 10

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

7 / 10

7. A phantom read anomaly occurs when?

8 / 10

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

9 / 10

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

10 / 10

10. What is the default Isolation Level?

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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. Information about subtransactions is stored under?

2 / 10

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

3 / 10

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

4 / 10

4. CLOG files are stored in which directory?

5 / 10

5. status of a subtransaction is written into CLOG?

6 / 10

6. index row headers like table row headers contain xmin and xmax fields?

7 / 10

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

8 / 10

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

9 / 10

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

10 / 10

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

choose 2

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