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

2 / 20

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

3 / 20

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

choose 2

4 / 20

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

5 / 20

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

6 / 20

6. What is the purpose of the public schema?

7 / 20

7. What is the purpose of the template0 database?

8 / 20

8. What is another name for the postgres process?

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9. Which of below are predefined schemas?

choose 2

10 / 20

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

11 / 20

11. What is the point of the pg_global tablespace?

12 / 20

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

13 / 20

13. What is the purpose of the template1 database?

14 / 20

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

15 / 20

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

16 / 20

16. Tablespaces are used to define physical data layout?

17 / 20

17. What is the purpose of the postgres database?

18 / 20

18. Postgres server spawns a new backend session for each connection?

19 / 20

19. Postgres uses a thread based process model?

20 / 20

20. What is the name of the system catalog table for relations?

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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. The SQL standard specifies three isolation levels?

2 / 10

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

3 / 10

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

4 / 10

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

6 / 10

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

7 / 10

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

choose 3

8 / 10

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

9 / 10

9. Which isolation level in theory could mean an application does not have to consider isolation anomalies?

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

2 / 10

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

3 / 10

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

4 / 10

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

5 / 10

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

6 / 10

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

choose 2

7 / 10

7. Tuples can also be referred to as columns?

8 / 10

8. psql provides a special mode that allows you to continue a transaction after a failure?

9 / 10

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

10 / 10

10. Page free space can often become fragmented?

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