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. What is the default standard size for a fork file?

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2. Which of below are predefined schemas?

choose 2

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

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

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

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6. What is the name of the 2 default tablespaces created after initialization?

choose 2

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

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8. Which fork is specific for unlogged tables?

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9. What is the purpose of autovacuum?

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

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

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12. What is a schema?

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13. What is the purpose of the template0 database?

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14. What is the name of the system catalog table for relations?

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15. System Catalog tables begin with which prefix?

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16. Each Database has its own System Catalog?

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

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18. Tablespaces are used to define physical data layout?

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

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

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

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

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3. Which parameters sets the database default isolation level?

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

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

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6. The SQL standard specifies three isolation levels?

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7. non-repeatable read anomaly occurs when?

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8. Which of the below are valid Isolations Levels?

choose 2

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

10 / 10

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. Information about subtransactions is stored under?

2 / 10

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

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

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4. status of a subtransaction is written into CLOG?

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

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7. CLOG contains how many bits for each transaction?

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

9 / 10

9. Page free space can often become fragmented?

10 / 10

10. virtual IDs exist only in PGDATA/pg_vxid when not cached?

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