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

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

3 / 20

3. What is the purpose of wal writer?

4 / 20

4. What is the purpose of the public schema?

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

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6. What is the purpose of the postgres database?

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

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8. Users should not modify the template0 database

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

10 / 20

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

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11. Which fork is specific for unlogged tables?

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12. The pg_default tablespace should never be used to create user tables?

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

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

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

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16. What is another name for the postgres process?

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17. What is the purpose of autovacuum?

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18. What is the purpose of the visibility map?

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19. Which of below are predefined schemas?

choose 2

20 / 20

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

choose 2

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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?

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2. Which parameters sets the database default isolation level?

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

4 / 10

4. A phantom read anomaly occurs when?

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

choose 3

6 / 10

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

7 / 10

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

8 / 10

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

9 / 10

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

10 / 10

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

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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. Which 2 items does a Virtual XID consist of?

2 / 10

2. To identify different versions of one and the same row, PostgreSQL marks each of them with which two value?

3 / 10

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

4 / 10

4. Which of the below are true about a Pages Item Pointer?

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

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

choose 2

7 / 10

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

8 / 10

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

9 / 10

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

10 / 10

10. CLOG Pages are never cached in memory?

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