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. The default Page size is 2k?

2 / 20

2. Tablespaces are used to define physical data layout?

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3. What is the default standard size for a fork file?

4 / 20

4. Who is the Author of the Postgres 14 Internals book?

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5. Users should not modify the template0 database

6 / 20

6. What is the point of the pg_global tablespace?

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

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

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9. What is the purpose of the template1 database?

10 / 20

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

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

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

13 / 20

13. Files are logically split into pages?

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

choose 2

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15. Each Database has its own System Catalog?

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

17 / 20

17. What is the purpose of wal writer?

18 / 20

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

19 / 20

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

20 / 20

20. Postgres by default has built in connection pooling abilities?

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

2 / 10

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

3 / 10

3. Which parameters sets the database default isolation level?

4 / 10

4. Which of the below are valid Isolations Levels?

choose 2

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

6 / 10

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

7 / 10

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

Select more than 1 answer below:

8 / 10

8. A phantom read anomaly occurs when?

9 / 10

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

choose 3

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. CLOG Pages are never cached in memory?

2 / 10

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

3 / 10

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

4 / 10

4. CLOG files are stored in which directory?

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

6 / 10

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

7 / 10

7. What does an Item Pointer contain?

choose 3

8 / 10

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

9 / 10

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

10 / 10

10. CLOG contains how many bits for each transaction?

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