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. A single Postgres Instance can server only one database?

2 / 20

2. What is the purpose of the template0 database?

3 / 20

3. The default Page size is 2k?

4 / 20

4. Which fork is specific for unlogged tables?

5 / 20

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

6 / 20

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

7 / 20

7. What is the purpose of the visibility map?

8 / 20

8. Which of below are predefined schemas?

choose 3

9 / 20

9. Tablespaces are used to define physical data layout?

10 / 20

10. System Catalog tables begin with which prefix?

11 / 20

11. pg_catalog schema is used to store system catalog tables?

12 / 20

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

13 / 20

13. Who is the Author of the Postgres 14 Internals book?

14 / 20

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

choose 2

15 / 20

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

16 / 20

16. Users should not modify the template0 database

17 / 20

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

18 / 20

18. TOAST tables reside in a seperate schema?

19 / 20

19. Which 3 databases exist directly after cluster initialization?

choose 3 options

20 / 20

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

choose 3

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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 more locks a transaction acquires, the better it is isolated from other transactions?

2 / 10

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

Select more than 1 answer below:

3 / 10

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

4 / 10

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

5 / 10

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

6 / 10

6. Which parameters sets the database default isolation level?

7 / 10

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

choose 3

8 / 10

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

9 / 10

9. non-repeatable read anomaly occurs when?

10 / 10

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

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

2 / 10

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

3 / 10

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

4 / 10

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

5 / 10

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

6 / 10

6. CLOG contains how many bits for each transaction?

7 / 10

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

8 / 10

8. What does an Item Pointer contain?

choose 3

9 / 10

9. status of a subtransaction is written into CLOG?

10 / 10

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

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