Postgres Quiz Archive

You have 200 seconds to answer 20 Random questions so think fast!

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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 rows in a page does Postgres aim to have before considering TOAST?

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2. What is the purpose of the public schema?

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3. The information_schema schema provides information on Postgres release notes?

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

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

Choose 2 option

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

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

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

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9. Which of below are predefined schemas?

choose 3

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10. Which fork is specific for unlogged tables?

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

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12. What is another name for the postgres process?

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13. Tablespaces can be used to segregate data based on performance needs?

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14. What is the purpose of autovacuum?

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15. Each Database has its own System Catalog?

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16. Which 3 databases exist directly after cluster initialization?

choose 3 options

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17. Which of the below objects can be referred to as relations?

choose 3

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

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

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

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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?

2 / 10

2. A phantom read anomaly occurs when?

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3. Which parameters sets the database default isolation level?

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

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5. What is the default Isolation Level?

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6. The SQL standard specifies three isolation levels?

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

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

choose 3

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

Select more than 1 answer below:

10 / 10

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

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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. at any one time Postgres can have several versions of a row?

2 / 10

2. status of a subtransaction is written into CLOG?

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3. CLOG Pages are never cached in memory?

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4. Page free space can often become fragmented?

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5. A page along with its tuples is read into the buffer cache with compression transformations to enhance cache efficiency?

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

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

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

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

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10. indexes do not use row versioning?

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