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

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

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

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

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

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

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

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8. Which of below are predefined schemas?

choose 3

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9. System Catalog tables begin with which prefix?

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

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

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12. Which of below are predefined schemas?

choose 2

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13. What is the purpose of the visibility map?

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

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15. What is the purpose of the template0 database?

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

Choose 2 option

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

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18. What is another name for the postgres process?

19 / 20

19. What is the purpose of the public schema?

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20. What is the purpose of wal writer?

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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 statements will start a transaction as Read Repeatable?

2 / 10

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

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

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4. The SQL standard specifies three isolation levels?

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

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

7 / 10

7. non-repeatable read anomaly occurs when?

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

9 / 10

9. What is the default Isolation Level?

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. CLOG files are stored in which directory?

2 / 10

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

3 / 10

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

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

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

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

choose 2

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

8 / 10

8. indexes do not use row versioning?

9 / 10

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

10 / 10

10. CLOG Pages are never cached in memory?

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