Postgres Quiz Archive

You have 200 seconds to answer 20 Random questions so think fast!

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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. pg_catalog schema is used to store system catalog tables?

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2. Each Database has its own System Catalog?

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

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

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

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7. Tablespaces are used to define physical data layout?

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8. TOAST tables reside in a seperate schema?

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9. What is the purpose of wal writer?

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

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11. What command is used to create the Postgres cluster?

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

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13. Users should not modify the template0 database

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

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

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16. Which fork contains the actual table data?

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17. What is another name for the postgres process?

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18. Files are logically split into pages?

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19. The default Page size is 2k?

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20. What is the purpose of the visibility map?

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

2 / 10

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

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

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

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5. The SQL standard specifies three isolation levels?

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6. Which parameters sets the database default isolation level?

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

Select more than 1 answer below:

8 / 10

8. Which of the below are valid Isolations Levels?

choose 2

9 / 10

9. A phantom read anomaly occurs when?

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

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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. Each page has a layer that usually consists of?

choose 2

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2. Information about subtransactions is stored under?

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3. The page header stores checksum and the sizes of the other parts of the page?

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4. CLOG contains how many bits for each transaction?

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

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

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

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

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

10 / 10

10. The page Special Space is located at the start of the page with highest address

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