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. Which 3 databases exist directly after cluster initialization?

choose 3 options

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

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

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

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

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6. It is the postmasters job to listener for incoming connections?

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

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

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

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10. Each Database has its own System Catalog?

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

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12. Which fork is specific for unlogged tables?

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

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14. What is the point of the pg_global tablespace?

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

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

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

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18. How many rows in a page does Postgres aim to have before considering TOAST?

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19. What is the purpose of the template0 database?

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

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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 parameters sets the database default isolation level?

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

choose 3

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3. A phantom read anomaly occurs when?

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

Select more than 1 answer below:

5 / 10

5. Which of the below are valid Isolations Levels?

choose 2

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

7 / 10

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

8 / 10

8. What is the default Isolation Level?

9 / 10

9. The SQL standard specifies three isolation levels?

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10. which of the below statements will start a transaction as Read Repeatable?

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

2 / 10

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

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3. status of a subtransaction is written into CLOG?

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4. Postgres table physical data files are always cross compatible across platforms?

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

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

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7. Tuples can also be referred to as columns?

8 / 10

8. indexes do not use row versioning?

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

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

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