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. Which fork is specific for unlogged tables?

3 / 20

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

4 / 20

4. Which of below are predefined schemas?

choose 3

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5. Which fork contains the actual table data?

6 / 20

6. What is the purpose of wal writer?

7 / 20

7. What is the purpose of autovacuum?

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8. Files are logically split into pages?

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9. What is the purpose of the template1 database?

10 / 20

10. The default Page size is 2k?

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11. What is the purpose of the visibility map?

12 / 20

12. What is another name for the postgres process?

13 / 20

13. What is the name of the system catalog table for relations?

14 / 20

14. TOAST tables reside in a seperate schema?

15 / 20

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

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16. How many rows in a page does Postgres aim to have before considering TOAST?

17 / 20

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

18 / 20

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

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19. What is the point of the pg_global tablespace?

20 / 20

20. Which 3 databases exist directly after cluster initialization?

choose 3 options

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

2 / 10

2. non-repeatable read anomaly occurs when?

3 / 10

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

choose 3

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

5 / 10

5. What is the default Isolation Level?

6 / 10

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

7 / 10

7. Which parameters sets the database default isolation level?

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

10 / 10

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

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

2 / 10

2. CLOG Pages are never cached in memory?

3 / 10

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

4 / 10

4. CLOG files are stored in which directory?

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5. Indexes values also support multi versioning with several versions of an index value existing at any point in time?

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6. Tuples can also be referred to as columns?

7 / 10

7. CLOG contains how many bits for each transaction?

8 / 10

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

9 / 10

9. Rows of TOAST tables are handled in such a way that they are never update?

10 / 10

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

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