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. 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. What is the purpose of the template1 database?

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4. What is a schema?

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5. TOAST tables reside in a seperate schema?

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6. Which fork is specific for unlogged tables?

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7. Users should not modify the template0 database

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8. The default Page size is 2k?

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9. Files are logically split into pages?

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

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11. What is the name of the mechanism used to store a row bigger than a page size?

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

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

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

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15. What is the default standard size for a fork file?

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16. What is the point of the pg_global tablespace?

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

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18. What is another name for the postgres process?

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

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

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

choose 3

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

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3. Which of the below are valid Isolations Levels?

choose 2

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4. Which parameters sets the database default isolation level?

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

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

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

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

9 / 10

9. A phantom read anomaly occurs when?

10 / 10

10. What is the default Isolation Level?

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

2 / 10

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

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3. indexes do not use row versioning?

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4. CLOG contains how many bits for each transaction?

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5. Page free space can often become fragmented?

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

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

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

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

10 / 10

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

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