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

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2. How many files or forks on disk will a 10Mb table with no index have?

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3. System Catalog tables begin with which prefix?

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

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

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6. Each Database has its own System Catalog?

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

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8. What is the purpose of autovacuum?

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9. Which fork contains the actual table data?

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10. Each tablespaces can only be assigned for use by one database

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

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12. Users should not modify the template0 database

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

choose 3

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14. What is the purpose of the visibility map?

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

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

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

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18. The default Page size is 2k?

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19. Which of below are predefined schemas?

choose 2

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

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

2 / 10

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

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

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4. Which parameters sets the database default isolation level?

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5. What is the default Isolation Level?

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

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

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

9 / 10

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

10 / 10

10. Which of the below are valid Isolations Levels?

choose 2

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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. status of a subtransaction is written into CLOG?

2 / 10

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

choose 2

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

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4. Information about subtransactions is stored under?

5 / 10

5. Page free space can often become fragmented?

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

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

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

9 / 10

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

10 / 10

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

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