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. Which fork keeps track of available space within pages?

2 / 20

2. What command is used to create the Postgres cluster?

3 / 20

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

4 / 20

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

5 / 20

5. What is the purpose of the template1 database?

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6. What is the purpose of the public schema?

7 / 20

7. Each Database has its own System Catalog?

8 / 20

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

9 / 20

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

10 / 20

10. Which fork is specific for unlogged tables?

11 / 20

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

12 / 20

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

13 / 20

13. Postgres uses a thread based process model?

14 / 20

14. Users should not modify the template0 database

15 / 20

15. TOAST tables reside in a seperate schema?

16 / 20

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

17 / 20

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

choose 2

18 / 20

18. What is the purpose of the template0 database?

19 / 20

19. What is the purpose of wal writer?

20 / 20

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

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

2 / 10

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

3 / 10

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

4 / 10

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

choose 3

5 / 10

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

6 / 10

6. A phantom read anomaly occurs when?

7 / 10

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

8 / 10

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

9 / 10

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

10 / 10

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

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

2 / 10

2. When a transaction is committed Postgres uses a special <replace with answer> structure?

3 / 10

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

4 / 10

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

5 / 10

5. status of a subtransaction is written into CLOG?

6 / 10

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

7 / 10

7. CLOG Pages are never cached in memory?

8 / 10

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

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. Which 2 items does a Virtual XID consist of?

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