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

2 / 20

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

3 / 20

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

4 / 20

4. What is the name of the mechanism used to store a row bigger than a page size?

5 / 20

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

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6. What is the purpose of the postgres database?

7 / 20

7. The default Page size is 2k?

8 / 20

8. Tablespaces are used to define physical data layout?

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9. System Catalog tables begin with which prefix?

10 / 20

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

11 / 20

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

12 / 20

12. When PostgreSQL is running what can it be referred to as?

Choose 2 option

13 / 20

13. Users should not modify the template0 database

14 / 20

14. Which fork is specific for unlogged tables?

15 / 20

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

16 / 20

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

17 / 20

17. A Postgres cluster consists of 2 or more physical servers accessing one Postgres Instance?

18 / 20

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

choose 2

19 / 20

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

20 / 20

20. What is the point of the pg_global tablespace?

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

2 / 10

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

3 / 10

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

4 / 10

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

5 / 10

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

6 / 10

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

choose 3

7 / 10

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

8 / 10

8. Which parameters sets the database default isolation level?

9 / 10

9. A phantom read anomaly occurs when?

10 / 10

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

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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. CLOG Pages are never cached in memory?

2 / 10

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

3 / 10

3. What does an Item Pointer contain?

choose 3

4 / 10

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

5 / 10

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

6 / 10

6. UPDATE can be regarded as which 2 separate operations?

7 / 10

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

8 / 10

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

9 / 10

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

10 / 10

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

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