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.

1 / 20

1. What is the purpose of the template1 database?

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2. Which 3 databases exist directly after cluster initialization?

choose 3 options

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

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4. Users should not modify the template0 database

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5. Postgres server spawns a new backend session for each connection?

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6. What is the purpose of the visibility map?

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7. Postgres uses a thread based process model?

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

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

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

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

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12. What is the point of the pg_global tablespace?

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13. Tablespaces are used to define physical data layout?

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

15 / 20

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

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16. How does Postgres know which schema to use if not specified?

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

choose 3

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18. What is another name for the postgres process?

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19. What is the name of the system catalog table for relations?

20 / 20

20. What is the purpose of wal writer?

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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 default Isolation Level?

2 / 10

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

3 / 10

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

Select more than 1 answer below:

4 / 10

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

5 / 10

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

6 / 10

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

7 / 10

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

8 / 10

8. Which of the below are valid Isolations Levels?

choose 2

9 / 10

9. The SQL standard specifies three isolation levels?

10 / 10

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

2 / 10

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

3 / 10

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

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

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5. CLOG contains how many bits for each transaction?

6 / 10

6. Each page has a layer that usually consists of?

choose 2

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

8 / 10

8. Which 2 items does a Virtual XID consist of?

9 / 10

9. Tuples can also be referred to as columns?

10 / 10

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

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