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.

1 / 20

1. What is a schema?

2 / 20

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

choose 2

3 / 20

3. What is the point of the pg_global tablespace?

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

5 / 20

5. Each Database has its own System Catalog?

6 / 20

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

Choose 2 option

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

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

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9. What is the purpose of autovacuum?

10 / 20

10. What is the purpose of the template1 database?

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

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12. What is the purpose of wal writer?

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13. To understand each other, a client and a server must use one and the same interfacing protocol?

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

15 / 20

15. TOAST tables reside in a seperate schema?

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16. What is the purpose of the template0 database?

17 / 20

17. The default Page size is 2k?

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18. What is the purpose of the visibility map?

19 / 20

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

20 / 20

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

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

2 / 10

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

3 / 10

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

4 / 10

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

5 / 10

5. Which parameters sets the database default isolation level?

6 / 10

6. Which of the below are valid Isolations Levels?

choose 2

7 / 10

7. The SQL standard specifies three isolation levels?

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

Select more than 1 answer below:

9 / 10

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

choose 3

10 / 10

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

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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. Tuples can also be referred to as columns?

2 / 10

2. CLOG Pages are never cached in memory?

3 / 10

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

4 / 10

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

5 / 10

5. What does an Item Pointer contain?

choose 3

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

7 / 10

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

8 / 10

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

9 / 10

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

10 / 10

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

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