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

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2. What is the point of the pg_global tablespace?

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3. Files are logically split into pages?

4 / 20

4. What is the purpose of the visibility map?

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

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6. Users should not modify the template0 database

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7. What is the name of the 2 default tablespaces created after initialization?

choose 2

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

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

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

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

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12. What is another name for the postgres process?

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

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

15 / 20

15. System Catalog tables begin with which prefix?

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

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17. What is the purpose of the template0 database?

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18. A Postgres cluster consists of 2 or more physical servers accessing one Postgres Instance?

19 / 20

19. What is the purpose of wal writer?

20 / 20

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

choose 3

2 / 10

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

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

4 / 10

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

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

6 / 10

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

7 / 10

7. Which parameters sets the database default isolation level?

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8. Which of the below are valid Isolations Levels?

choose 2

9 / 10

9. A phantom read anomaly occurs when?

10 / 10

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

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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. a transaction containing a savepoint is will still be considered as only a single transaction?

2 / 10

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

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

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4. CLOG files are stored in which directory?

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

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

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

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

9 / 10

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

10 / 10

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

choose 2

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