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 by default has built in connection pooling abilities?

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

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

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4. A schema can belong to more than one database?

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

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

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7. What is the purpose of autovacuum?

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

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

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

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11. What is the point of the pg_global tablespace?

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12. Which 3 databases exist directly after cluster initialization?

choose 3 options

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13. Which fork contains the actual table data?

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14. What is the purpose of the visibility map?

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

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16. Users should not modify the template0 database

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17. TOAST tables reside in a seperate schema?

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

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

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

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

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

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

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5. The SQL standard specifies three isolation levels?

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

7 / 10

7. A phantom read anomaly occurs when?

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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. Which parameters sets the database default isolation level?

10 / 10

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

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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. What does an Item Pointer contain?

choose 3

2 / 10

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

3 / 10

3. Tuples can also be referred to as columns?

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4. When a row is created, its xmin value is set to the transaction ID of which command?

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

choose 2

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6. CLOG Pages are never cached in memory?

7 / 10

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

8 / 10

8. CLOG files are stored in which directory?

9 / 10

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

10 / 10

10. Page free space can often become fragmented?

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