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 a schema?

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2. What is the name of the directory that contains the files related to the Postgres cluster?

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3. What is the purpose of the template0 database?

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

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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 purpose of wal writer?

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

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

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9. What is the point of the pg_global tablespace?

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

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11. TOAST tables reside in a seperate schema?

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

choose 3

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

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

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15. Each Database has its own System Catalog?

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

choose 2

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

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18. Which of below are predefined schemas?

choose 2

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19. What is the purpose of the template1 database?

20 / 20

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

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

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

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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:

5 / 10

5. What is the default Isolation Level?

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

9 / 10

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

10 / 10

10. The SQL standard specifies three isolation levels?

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

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2. a transaction containing a savepoint is will still be considered as only a single transaction?

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3. CLOG Pages are never cached in memory?

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4. Information about subtransactions is stored under?

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5. Page header sizes can be easily displayed using the <choose from answers> extension

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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. Which 2 items does a Virtual XID consist of?

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

9 / 10

9. The page header is located in the highest address?

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

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