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.

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

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2. What is the purpose of wal writer?

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3. Which of below are predefined schemas?

choose 3

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

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5. Tablespaces are used to define physical data layout?

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6. TOAST tables reside in a seperate schema?

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7. Which fork is specific for unlogged tables?

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8. Which fork contains the actual table data?

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9. Tablespaces can be used to segregate data based on performance needs?

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10. What is the process first launched at server start?

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

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

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

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14. What is the purpose of the template1 database?

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

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

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

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18. What is a schema?

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

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

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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?

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3. Which of the below are valid Isolations Levels?

choose 2

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

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

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6. What is the default Isolation Level?

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7. Which parameters sets the database default isolation level?

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

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

Select more than 1 answer below:

10 / 10

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

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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. The page header is located in the highest address?

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2. UPDATE can be regarded as which 2 separate operations?

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3. Information about subtransactions is stored under?

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

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

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

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

choose 2

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

10 / 10

10. CLOG files are stored in which directory?

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