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

choose 3

2 / 20

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

3 / 20

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

choose 2

4 / 20

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

5 / 20

5. What is the purpose of wal writer?

6 / 20

6. Which of below are predefined schemas?

choose 2

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7. Each Database has its own System Catalog?

8 / 20

8. Which 3 databases exist directly after cluster initialization?

choose 3 options

9 / 20

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

10 / 20

10. TOAST tables reside in a seperate schema?

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

12 / 20

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

13 / 20

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

14 / 20

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

15 / 20

15. The default Page size is 2k?

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16. Which fork is specific for unlogged tables?

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

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

19 / 20

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

20 / 20

20. Some System Catalog tables are common to all databases in the 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. Which isolation level in theory could mean an application does not have to consider isolation anomalies?

2 / 10

2. A phantom read anomaly occurs when?

3 / 10

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

4 / 10

4. Which of the below are valid Isolations Levels?

choose 2

5 / 10

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

6 / 10

6. What is the default Isolation Level?

7 / 10

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

choose 3

8 / 10

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

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

2 / 10

2. Tuples can also be referred to as columns?

3 / 10

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

4 / 10

4. indexes do not use row versioning?

5 / 10

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

6 / 10

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

7 / 10

7. CLOG contains how many bits for each transaction?

8 / 10

8. If a transaction aborts, all page changes are reverted(rolled back) in place?

9 / 10

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

10 / 10

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

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