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. A schema can belong to more than one database?

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

3 / 20

3. What is the purpose of the template0 database?

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4. Which 3 databases exist directly after cluster initialization?

choose 3 options

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

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6. What is the purpose of the postgres database?

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

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8. System Catalog tables begin with which prefix?

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9. Users should not modify the template0 database

10 / 20

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

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11. Which of below are predefined schemas?

choose 2

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

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13. Which fork is specific for unlogged tables?

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

15 / 20

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

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16. To be able to restore data consistency, Postgres maintains

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

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

19 / 20

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

20 / 20

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

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

2 / 10

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

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

4 / 10

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

5 / 10

5. Data Consistency is best handled at the application layer rather than at the database layer?

6 / 10

6. The SQL standard specifies three isolation levels?

7 / 10

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

8 / 10

8. Which parameters sets the database default isolation level?

9 / 10

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

choose 3

10 / 10

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

2 / 10

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

3 / 10

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

4 / 10

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

5 / 10

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

6 / 10

6. CLOG contains how many bits for each transaction?

7 / 10

7. at any one time Postgres can have several versions of a row?

8 / 10

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

9 / 10

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

10 / 10

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

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