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

Choose 2 option

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

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3. Which fork contains the actual table data?

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4. What is another name for the postgres process?

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5. What is the purpose of autovacuum?

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

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

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8. What is the purpose of the visibility map?

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9. Which fork is specific for unlogged tables?

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

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

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13. Each Database has its own System Catalog?

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

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

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16. What is the purpose of the template1 database?

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17. System Catalog tables begin with which prefix?

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

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19. What is the purpose of wal writer?

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

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

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2. What is the default Isolation Level?

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

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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:

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

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6. Which of the below are valid Isolations Levels?

choose 2

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

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

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9. The SQL standard specifies three isolation levels?

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10. Which parameters sets the database 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. The page Special Space is located at the start of the page with highest address

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

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

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

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5. Which of the below are true about a Pages Item Pointer?

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

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

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

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

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10. CLOG Pages are never cached in memory?

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