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. How many files or forks on disk will a 10Mb table with no index have?

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2. Which 3 databases exist directly after cluster initialization?

choose 3 options

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3. What is the purpose of wal writer?

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

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5. What is the purpose of the public schema?

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6. The default Page size is 2k?

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

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8. What is the purpose of the template1 database?

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

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

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

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12. What is the point of the pg_global tablespace?

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13. Which fork contains the actual table data?

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

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15. If we create a new tablespace which directory will symbolic links be created from?

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

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

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

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

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

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

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

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

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4. Which parameters sets the database default isolation level?

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

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

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

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8. non-repeatable read anomaly occurs when?

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

choose 3

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

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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 do not use row versioning?

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

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

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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. Rows of TOAST tables are handled in such a way that they are never update?

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

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

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9. status of a subtransaction is written into CLOG?

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10. Information about subtransactions is stored under?

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