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

2 / 20

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

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

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

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

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6. Which of below are predefined schemas?

choose 2

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7. What is the purpose of the visibility map?

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8. Each Database has its own System Catalog?

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9. Postgres uses a thread based process model?

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10. The default Page size is 2k?

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

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12. What is the purpose of the postgres database?

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

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

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

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16. TOAST tables reside in a seperate schema?

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

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18. Some System Catalog tables are common to all databases in the cluster?

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

choose 2

20 / 20

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

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

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

3 / 10

3. What is the default Isolation Level?

4 / 10

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

5 / 10

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

Select more than 1 answer below:

6 / 10

6. The SQL standard specifies three isolation levels?

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

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8. Which of the below are valid Isolations Levels?

choose 2

9 / 10

9. A phantom read anomaly occurs when?

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

2 / 10

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

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

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

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

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6. What does an Item Pointer contain?

choose 3

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7. CLOG files are stored in which directory?

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8. Which 2 of the below represent transaction IDs used for row versioning?

9 / 10

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

10 / 10

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

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