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 directory that contains the files related to the Postgres cluster?

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

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

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

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5. Tablespaces are used to define physical data layout?

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6. Which fork is specific for unlogged tables?

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7. What is the purpose of the template1 database?

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

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9. What is the purpose of the public schema?

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

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

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

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

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

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15. It is the postmasters job to listener for incoming connections?

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

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17. Which of below are predefined schemas?

choose 3

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18. What is the purpose of autovacuum?

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

20 / 20

20. What is the point of the pg_global tablespace?

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

Select more than 1 answer below:

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

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

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

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

choose 3

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6. A phantom read anomaly occurs when?

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7. What is the default Isolation Level?

8 / 10

8. The SQL standard specifies three isolation levels?

9 / 10

9. Which parameters sets the database default isolation level?

10 / 10

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

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

2 / 10

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

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

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4. Page free space can often become fragmented?

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

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

7 / 10

7. psql provides a special mode that allows you to continue a transaction after a failure?

8 / 10

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

9 / 10

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

10 / 10

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

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