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. Files are logically split into pages?

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

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

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4. What is the purpose of the visibility map?

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

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

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

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

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

10 / 20

10. Tablespaces are used to define physical data layout?

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11. What is the purpose of the postgres database?

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12. What is the purpose of the public schema?

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13. What is the purpose of wal writer?

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14. What is the purpose of the template1 database?

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

choose 3

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16. TOAST tables reside in a seperate schema?

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17. Each Database has its own System Catalog?

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

19 / 20

19. The default Page size is 2k?

20 / 20

20. Which 3 databases exist directly after cluster initialization?

choose 3 options

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

3 / 10

3. Which parameters sets the database default isolation level?

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

choose 3

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5. The SQL standard specifies three isolation levels?

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

7 / 10

7. Snapshot isolation is preferred but increases the number of required locks?

8 / 10

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

9 / 10

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

10 / 10

10. A phantom read anomaly occurs when?

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

3 / 10

3. CLOG contains how many bits for each transaction?

4 / 10

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

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

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6. index row headers like table row headers contain xmin and xmax fields?

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

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8. status of a subtransaction is written into CLOG?

9 / 10

9. What does an Item Pointer contain?

choose 3

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

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