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 name of the mechanism used to store a row bigger than a page size?

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

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

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4. Tablespaces are used to define physical data layout?

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

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

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7. Which of below are predefined schemas?

choose 2

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8. TOAST tables reside in a seperate schema?

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9. Which fork is specific for unlogged tables?

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10. What is the purpose of the visibility map?

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

choose 2

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

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

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

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15. A single Postgres Instance can server only one database?

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

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17. When PostgreSQL is running what can it be referred to as?

Choose 2 option

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18. What is the point of the pg_global tablespace?

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19. What is the purpose of the postgres database?

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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 of the below would best describe a dirty read?

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

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3. The SQL standard specifies three isolation levels?

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4. Which parameters sets the database default isolation level?

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

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

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8. Which of the below are valid Isolations Levels?

choose 2

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

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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. CLOG files are stored in which directory?

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

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

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

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

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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. CLOG contains how many bits for each transaction?

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

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

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

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