Postgres Quiz Archive

You have 200 seconds to answer 20 Random questions so think fast!

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

2 / 20

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

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3. What is the purpose of the visibility map?

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4. What is the purpose of the template1 database?

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5. What is a schema?

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6. What is the purpose of the postgres database?

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7. TOAST tables reside in a seperate schema?

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

choose 3

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

10 / 20

10. What is the purpose of autovacuum?

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

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12. What is the purpose of the public schema?

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

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

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15. Which of below are predefined schemas?

choose 2

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

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17. Users should not modify the template0 database

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

19 / 20

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

20 / 20

20. Each Database has its own System Catalog?

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

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3. Which of the below are valid Isolations Levels?

choose 2

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

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5. The SQL standard specifies three isolation levels?

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

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

choose 3

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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. 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 files are stored in which directory?

2 / 10

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

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

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4. The page Special Space is located at the start of the page with highest address

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5. Each page has a layer that usually consists of?

choose 2

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6. Information about subtransactions is stored under?

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7. A page along with its tuples is read into the buffer cache with compression transformations to enhance cache efficiency?

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

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

10 / 10

10. CLOG contains how many bits for each transaction?

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