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 directory that contains the files related to the Postgres cluster?

2 / 20

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

3 / 20

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

4 / 20

4. What is the purpose of the visibility map?

5 / 20

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

6 / 20

6. Postgres uses a thread based process model?

7 / 20

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

8 / 20

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

9 / 20

9. Which fork is specific for unlogged tables?

10 / 20

10. What is the purpose of the template1 database?

11 / 20

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

12 / 20

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

13 / 20

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

choose 2

14 / 20

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

15 / 20

15. What is the purpose of the public schema?

16 / 20

16. What is the purpose of wal writer?

17 / 20

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

18 / 20

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

19 / 20

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

20 / 20

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

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

2 / 10

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

3 / 10

3. What is the default Isolation Level?

4 / 10

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

5 / 10

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

6 / 10

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

7 / 10

7. The SQL standard specifies three isolation levels?

8 / 10

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

Select more than 1 answer below:

9 / 10

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

choose 3

10 / 10

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

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. A page along with its tuples is read into the buffer cache with compression transformations to enhance cache efficiency?

2 / 10

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

3 / 10

3. Which function can we use to find the current transaction ID?

4 / 10

4. The page Special Space is located at the start of the page with highest address

5 / 10

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

choose 2

6 / 10

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

7 / 10

7. If a transaction aborts, all page changes are reverted(rolled back) in place?

8 / 10

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

9 / 10

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

10 / 10

10. Information about subtransactions is stored under?

Your score is

0%