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

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2. It is the postmasters job to listener for incoming connections?

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3. Which of below are predefined schemas?

choose 2

4 / 20

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

5 / 20

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

6 / 20

6. Postgres by default has built in connection pooling abilities?

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

8 / 20

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

9 / 20

9. Which fork contains the actual table data?

10 / 20

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

11 / 20

11. A single Postgres Instance can server only one database?

12 / 20

12. System Catalog tables begin with which prefix?

13 / 20

13. Files are logically split into pages?

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14. What is the purpose of the template1 database?

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15. Which of below are predefined schemas?

choose 3

16 / 20

16. Tablespaces can be used to segregate data based on performance needs?

17 / 20

17. What is another name for the postgres process?

18 / 20

18. Tablespaces are used to define physical data layout?

19 / 20

19. Users should not modify the template0 database

20 / 20

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

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

3 / 10

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

4 / 10

4. The SQL standard specifies three isolation levels?

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. non-repeatable read anomaly occurs when?

7 / 10

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

choose 3

8 / 10

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

9 / 10

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

10 / 10

10. What is the 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. Tuples can also be referred to as columns?

2 / 10

2. Each page has a layer that usually consists of?

choose 2

3 / 10

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

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. CLOG files are stored in which directory?

7 / 10

7. If a transaction is read only which kind of Transaction ID is it allocated?

8 / 10

8. The page Special Space is located at the start of the page with highest address

9 / 10

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

10 / 10

10. Information about subtransactions is stored under?

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