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 visibility map?

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2. What is the purpose of the postgres database?

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

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

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5. Some System Catalog tables are common to all databases in the cluster?

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6. Tablespaces are used to define physical data layout?

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

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

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

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10. What is the purpose of autovacuum?

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11. pg_catalog schema is used to store system catalog tables?

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12. Which fork is specific for unlogged tables?

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13. What is the purpose of wal writer?

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

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

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16. Which 3 databases exist directly after cluster initialization?

choose 3 options

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

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18. Files are logically split into pages?

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

20 / 20

20. TOAST tables reside in a seperate schema?

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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 of the below are valid Isolations Levels?

choose 2

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

4 / 10

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

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

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

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7. Which parameters sets the database default isolation level?

8 / 10

8. The SQL standard specifies three isolation levels?

9 / 10

9. What is the default Isolation Level?

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

2 / 10

2. CLOG contains how many bits for each transaction?

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3. In Postgres, tables are often referred to as which of the below?

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

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

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

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7. What does an Item Pointer contain?

choose 3

8 / 10

8. Information about subtransactions is stored under?

9 / 10

9. Tuples can also be referred to as columns?

10 / 10

10. status of a subtransaction is written into CLOG?

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