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 is the purpose of the template1 database?

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2. Each Database has its own System Catalog?

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

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

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

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

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

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8. Users should not modify the template0 database

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

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

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11. What is the purpose of the template0 database?

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

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

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

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15. Which of below are predefined schemas?

choose 3

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16. What is the purpose of the postgres database?

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

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

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19. What is the purpose of autovacuum?

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

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

Select more than 1 answer below:

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

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6. non-repeatable read anomaly occurs when?

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

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8. Which parameters sets the database default isolation level?

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9. What is the default Isolation Level?

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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. index row headers like table row headers contain xmin and xmax fields?

2 / 10

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

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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. Which 2 items does a Virtual XID consist of?

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

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6. If a transaction is read only which kind of Transaction ID is it allocated?

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

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

9 / 10

9. Tuples can also be referred to as columns?

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10. UPDATE can be regarded as which 2 separate operations?

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