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. Postgres by default has built in connection pooling abilities?

3 / 20

3. Postgres uses a thread based process model?

4 / 20

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

5 / 20

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

choose 2

6 / 20

6. What is another name for the postgres process?

7 / 20

7. What 3 files/forks as a minimum make up a table on disk?

8 / 20

8. What is the purpose of the visibility map?

9 / 20

9. What is the purpose of wal writer?

10 / 20

10. What is the purpose of the postgres database?

11 / 20

11. Which of below are predefined schemas?

choose 3

12 / 20

12. Each tablespaces can only be assigned for use by one database

13 / 20

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

14 / 20

14. What is the purpose of the template1 database?

15 / 20

15. Which fork is specific for unlogged tables?

16 / 20

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

17 / 20

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

choose 3

18 / 20

18. Which fork contains the actual table data?

19 / 20

19. What column in system catalogs servers as the Primary Key

20 / 20

20. To understand each other, a client and a server must use one and the same interfacing protocol?

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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. The SQL standard specifies three isolation levels?

3 / 10

3. non-repeatable read anomaly occurs when?

4 / 10

4. A phantom read anomaly occurs when?

5 / 10

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

choose 3

6 / 10

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

7 / 10

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

8 / 10

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

9 / 10

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

10 / 10

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

Your score is

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

2 / 10

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

3 / 10

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

4 / 10

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

5 / 10

5. Information about subtransactions is stored under?

6 / 10

6. virtual IDs exist only in PGDATA/pg_vxid when not cached?

7 / 10

7. CLOG Pages are never cached in memory?

8 / 10

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

9 / 10

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

10 / 10

10. indexes do not use row versioning?

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