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. What column in system catalogs servers as the Primary Key

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

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

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

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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 system catalog table for relations?

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7. The default Page size is 2k?

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

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

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10. Files are logically split into pages?

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11. What is the purpose of the template0 database?

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12. Users should not modify the template0 database

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13. Each Database has its own System Catalog?

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

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

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

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

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

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

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20. Which of below are predefined schemas?

choose 3

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

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2. The SQL standard specifies three isolation levels?

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

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

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5. A phantom read anomaly occurs when?

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

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7. Which parameters sets the database default isolation level?

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

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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. What is the default Isolation Level?

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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. Page free space can often become fragmented?

2 / 10

2. CLOG files are stored in which directory?

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3. The page header stores checksum and the sizes of the other parts of the page?

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

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

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

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

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8. psql provides a special mode that allows you to continue a transaction after a failure?

9 / 10

9. The page Special Space is located at the start of the page with highest address

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10. Information about subtransactions is stored under?

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