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 purpose of the public schema?

2 / 20

2. What is the purpose of autovacuum?

3 / 20

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

4 / 20

4. Which of below are predefined schemas?

choose 3

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

choose 2

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

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7. Which fork keeps track of available space within pages?

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8. Which of below are predefined schemas?

choose 2

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

10 / 20

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

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11. System Catalog tables begin with which prefix?

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

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13. What is the point of the pg_global tablespace?

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

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15. Each tablespaces can only be assigned for use by one database

16 / 20

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

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17. When PostgreSQL is running what can it be referred to as?

Choose 2 option

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

19 / 20

19. What is the purpose of wal writer?

20 / 20

20. Which 3 databases exist directly after cluster initialization?

choose 3 options

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0%

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

Select more than 1 answer below:

3 / 10

3. Which of the below are valid Isolations Levels?

choose 2

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

5 / 10

5. A phantom read anomaly occurs when?

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

7 / 10

7. The SQL standard specifies three isolation levels?

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

9 / 10

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

10 / 10

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

Your score is

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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. Indexes values also support multi versioning with several versions of an index value existing at any point in time?

2 / 10

2. Which 2 of the below represent transaction IDs used for row versioning?

3 / 10

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

4 / 10

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

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5. virtual IDs exist only in PGDATA/pg_vxid when not cached?

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

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

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8. status of a subtransaction is written into CLOG?

9 / 10

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

10 / 10

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

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