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. What is the purpose of autovacuum?

2 / 20

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

3 / 20

3. The default Page size is 2k?

4 / 20

4. What is another name for the postgres process?

5 / 20

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

Choose 2 option

6 / 20

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

choose 2

7 / 20

7. Which of below are predefined schemas?

choose 3

8 / 20

8. Each Database has its own System Catalog?

9 / 20

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

10 / 20

10. Which fork keeps track of available space within pages?

11 / 20

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

12 / 20

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

13 / 20

13. What is the purpose of the public schema?

14 / 20

14. TOAST tables reside in a seperate schema?

15 / 20

15. Tablespaces are used to define physical data layout?

16 / 20

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

17 / 20

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

18 / 20

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

19 / 20

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

20 / 20

20. Which of below are predefined schemas?

choose 2

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

3 / 10

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

4 / 10

4. What is the default Isolation Level?

5 / 10

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

6 / 10

6. Which of the below are valid Isolations Levels?

choose 2

7 / 10

7. The SQL standard specifies three isolation levels?

8 / 10

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

9 / 10

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

10 / 10

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

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

2 / 10

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

3 / 10

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

4 / 10

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

5 / 10

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

6 / 10

6. indexes do not use row versioning?

7 / 10

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

8 / 10

8. status of a subtransaction is written into CLOG?

9 / 10

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

10 / 10

10. What does an Item Pointer contain?

choose 3

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