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 below are predefined schemas?

choose 3

2 / 20

2. What is the purpose of autovacuum?

3 / 20

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

4 / 20

4. Files are logically split into pages?

5 / 20

5. The default Page size is 2k?

6 / 20

6. Postgres uses a thread based process model?

7 / 20

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

8 / 20

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

choose 2

9 / 20

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

10 / 20

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

11 / 20

11. What command is used to create the Postgres cluster?

12 / 20

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

13 / 20

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

14 / 20

14. What is the point of the pg_global tablespace?

15 / 20

15. Which 3 databases exist directly after cluster initialization?

choose 3 options

16 / 20

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

17 / 20

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

18 / 20

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

19 / 20

19. Each Database has its own System Catalog?

20 / 20

20. What is the purpose of the template1 database?

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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 default Isolation Level?

2 / 10

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

3 / 10

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

Select more than 1 answer below:

4 / 10

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

5 / 10

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

6 / 10

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

7 / 10

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

8 / 10

8. The SQL standard specifies three isolation levels?

9 / 10

9. Which of the below are valid Isolations Levels?

choose 2

10 / 10

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

choose 3

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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. indexes do not use row versioning?

2 / 10

2. UPDATE can be regarded as which 2 separate operations?

3 / 10

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

4 / 10

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

5 / 10

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

6 / 10

6. Tuples can also be referred to as columns?

7 / 10

7. CLOG Pages are never cached in memory?

8 / 10

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

9 / 10

9. CLOG contains how many bits for each transaction?

10 / 10

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

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