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.

1 / 20

1. TOAST tables reside in a seperate schema?

2 / 20

2. Users should not modify the template0 database

3 / 20

3. Tablespaces are used to define physical data layout?

4 / 20

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

5 / 20

5. What is the purpose of autovacuum?

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6. What is the purpose of the postgres database?

7 / 20

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

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

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9. Which 3 databases exist directly after cluster initialization?

choose 3 options

10 / 20

10. What is the purpose of wal writer?

11 / 20

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

12 / 20

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

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

Choose 2 option

14 / 20

14. System Catalog tables begin with which prefix?

15 / 20

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

16 / 20

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

17 / 20

17. What is the purpose of the template0 database?

18 / 20

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

19 / 20

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

20 / 20

20. What is the purpose of the public schema?

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

2 / 10

2. The SQL standard specifies three isolation levels?

3 / 10

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

4 / 10

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

5 / 10

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

Select more than 1 answer below:

6 / 10

6. Which parameters sets the database default isolation level?

7 / 10

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

8 / 10

8. Based on Snapshot Isolation use of MVCC which of the below are permitted?

choose 3

9 / 10

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

10 / 10

10. Lost updates are forbidden by the standard at all 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. status of a subtransaction is written into CLOG?

2 / 10

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

3 / 10

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

4 / 10

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

5 / 10

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

6 / 10

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

7 / 10

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

8 / 10

8. Which 2 of the below represent transaction IDs used for row versioning?

9 / 10

9. Postgres table physical data files are always cross compatible across platforms?

10 / 10

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

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