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

2 / 20

2. System Catalog tables begin with which prefix?

3 / 20

3. Which 3 databases exist directly after cluster initialization?

choose 3 options

4 / 20

4. TOAST tables reside in a seperate schema?

5 / 20

5. Files are logically split into pages?

6 / 20

6. Each Database has its own System Catalog?

7 / 20

7. What is the default standard size for a fork file?

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

9 / 20

9. What is another name for the postgres process?

10 / 20

10. A single Postgres Instance can server only one database?

11 / 20

11. What is the name of the mechanism used to store a row bigger than a page size?

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12. What is the purpose of autovacuum?

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

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

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

16 / 20

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

17 / 20

17. What is the purpose of the postgres database?

18 / 20

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

choose 2

19 / 20

19. What is the purpose of wal writer?

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

2 / 10

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

3 / 10

3. The SQL standard specifies three isolation levels?

4 / 10

4. Which of the below are valid Isolations Levels?

choose 2

5 / 10

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

6 / 10

6. What is the default Isolation Level?

7 / 10

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

8 / 10

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

9 / 10

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

choose 3

10 / 10

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

Select more than 1 answer below:

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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. CLOG contains how many bits for each transaction?

2 / 10

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

3 / 10

3. CLOG files are stored in which directory?

4 / 10

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

5 / 10

5. Page free space can often become fragmented?

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. Which 2 of the below represent transaction IDs used for row versioning?

8 / 10

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

choose 2

9 / 10

9. Tuples can also be referred to as columns?

10 / 10

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

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