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 public schema?

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

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

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

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

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6. TOAST tables reside in a seperate schema?

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

choose 3

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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. To be able to restore data consistency, Postgres maintains

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

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

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13. Tablespaces are used to define physical data layout?

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14. What is another name for the postgres process?

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

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

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

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

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

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20. Which fork is specific for unlogged tables?

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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. The SQL standard specifies three isolation levels?

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2. Which parameters sets the database default isolation level?

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

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4. non-repeatable read anomaly occurs when?

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

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

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

8 / 10

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

9 / 10

9. Which of the below are valid Isolations Levels?

choose 2

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

2 / 10

2. status of a subtransaction is written into CLOG?

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3. To identify different versions of one and the same row, PostgreSQL marks each of them with which two value?

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4. The page header is located in the highest address?

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

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6. CLOG contains how many bits for each transaction?

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

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8. CLOG files are stored in which directory?

9 / 10

9. Tuples can also be referred to as columns?

10 / 10

10. Indexes values also support multi versioning with several versions of an index value existing at any point in time?

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