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 3 databases exist directly after cluster initialization?

choose 3 options

2 / 20

2. What is the purpose of the public schema?

3 / 20

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

4 / 20

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

5 / 20

5. What is the purpose of wal writer?

6 / 20

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

7 / 20

7. The default Page size is 2k?

8 / 20

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

Choose 2 option

9 / 20

9. Tablespaces are used to define physical data layout?

10 / 20

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

11 / 20

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

12 / 20

12. What is the point of the pg_global tablespace?

13 / 20

13. What is another name for the postgres process?

14 / 20

14. Which of below are predefined schemas?

choose 3

15 / 20

15. Which of below are predefined schemas?

choose 2

16 / 20

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

17 / 20

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

18 / 20

18. Which fork contains the actual table data?

19 / 20

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

20 / 20

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

Your score is

0%

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

Select more than 1 answer below:

2 / 10

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

3 / 10

3. Which of the below are valid Isolations Levels?

choose 2

4 / 10

4. The SQL standard specifies three isolation levels?

5 / 10

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

6 / 10

6. A phantom read anomaly occurs when?

7 / 10

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

8 / 10

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

choose 3

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?

Your score is

0%

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. CLOG files are stored in which directory?

2 / 10

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

3 / 10

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

4 / 10

4. indexes do not use row versioning?

5 / 10

5. at any one time Postgres can have several versions of a row?

6 / 10

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

7 / 10

7. CLOG Pages are never cached in memory?

8 / 10

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

9 / 10

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

choose 2

10 / 10

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

Your score is

0%