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 name of the system catalog table for relations?

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

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3. What is the purpose of the template1 database?

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

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5. The default Page size is 2k?

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

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7. Which 3 databases exist directly after cluster initialization?

choose 3 options

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

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

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

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11. Postgres by default has built in connection pooling abilities?

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

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13. Users should not modify the template0 database

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14. Postgres uses a thread based process model?

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

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16. Files are logically split into pages?

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

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18. Which fork contains the actual table data?

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19. What is a schema?

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20. Each Database has its own System Catalog?

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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. A phantom read anomaly occurs when?

2 / 10

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

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3. The SQL standard specifies three isolation levels?

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

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

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

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7. Which of the below are valid Isolations Levels?

choose 2

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

Select more than 1 answer below:

9 / 10

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

10 / 10

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

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

2 / 10

2. Postgres table physical data files are always cross compatible across platforms?

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3. CLOG Pages are never cached in memory?

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4. CLOG files are stored in which directory?

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

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6. Page free space can often become fragmented?

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7. indexes do not use row versioning?

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

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9. When a transaction is committed Postgres uses a special <replace with answer> structure?

10 / 10

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

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