Postgres Quiz Archive

You have 200 seconds to answer 20 Random questions so think fast!

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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 the public schema?

2 / 20

2. The default Page size is 2k?

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

4 / 20

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

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5. Tablespaces are used to define physical data layout?

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6. It is the postmasters job to listener for incoming connections?

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7. What is the purpose of wal writer?

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8. To be able to restore data consistency, Postgres maintains

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9. Users should not modify the template0 database

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10. Which of the below objects can be referred to as relations?

choose 3

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11. What is the point of the pg_global tablespace?

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

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

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14. What is the purpose of the visibility map?

15 / 20

15. pg_catalog schema is used to store system catalog tables?

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16. What is the purpose of the template0 database?

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17. Which fork is specific for unlogged tables?

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

19 / 20

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

20 / 20

20. What is a schema?

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

choose 3

2 / 10

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

3 / 10

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

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4. Which parameters sets the database default isolation level?

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5. What is the default Isolation Level?

6 / 10

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

7 / 10

7. What is the acronym used for the attributes that ensure Data consistency, integrity and durability?

8 / 10

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

Select more than 1 answer below:

9 / 10

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

10 / 10

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

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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. status of a subtransaction is written into CLOG?

2 / 10

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

3 / 10

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

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4. Indexes values also support multi versioning with several versions of an index value existing at any point in time?

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

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6. CLOG contains how many bits for each transaction?

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

8 / 10

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

9 / 10

9. Which of the below are true about a Pages Item Pointer?

10 / 10

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

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