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. What is the purpose of the visibility map?

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

choose 3

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

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

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

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

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7. Tablespaces are used to define physical data layout?

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8. Which 3 databases exist directly after cluster initialization?

choose 3 options

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

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10. What is the point of the pg_global tablespace?

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

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12. Users should not modify the template0 database

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

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14. Which fork contains the actual table data?

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15. What is the purpose of the postgres database?

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

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

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

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

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

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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?

2 / 10

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

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

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

choose 3

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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 default Isolation Level?

9 / 10

9. A phantom read anomaly occurs when?

10 / 10

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

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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. In Postgres, tables are often referred to as which of the below?

2 / 10

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

3 / 10

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

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4. If a transaction aborts, all page changes are reverted(rolled back) in place?

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5. CLOG files are stored in which directory?

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6. A page along with its tuples is read into the buffer cache with compression transformations to enhance cache efficiency?

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7. at any one time Postgres can have several versions of a row?

8 / 10

8. a transaction containing a savepoint is will still be considered as only a single transaction?

9 / 10

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

10 / 10

10. What does an Item Pointer contain?

choose 3

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