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.

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1. Which 3 databases exist directly after cluster initialization?

choose 3 options

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

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

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4. Tablespaces can be used to segregate data based on performance needs?

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

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

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7. What is the purpose of the public schema?

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8. TOAST tables reside in a seperate schema?

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9. What is the purpose of the template1 database?

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

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11. Users should not modify the template0 database

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12. What is the purpose of autovacuum?

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13. What is the purpose of the visibility map?

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14. The default Page size is 2k?

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15. What is the point of the pg_global tablespace?

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

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

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

19 / 20

19. Tablespaces are used to define physical data layout?

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

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

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

Select more than 1 answer below:

3 / 10

3. What is the default Isolation Level?

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

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

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

7 / 10

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

8 / 10

8. Which of the below are valid Isolations Levels?

choose 2

9 / 10

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

10 / 10

10. The SQL standard specifies three isolation levels?

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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. indexes do not use row versioning?

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3. A page along with its tuples is read into the buffer cache with compression transformations to enhance cache efficiency?

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

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

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

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

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

9 / 10

9. The page Special Space is located at the start of the page with highest address

10 / 10

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

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