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. What command is used to create the Postgres cluster?

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2. What is the purpose of the public schema?

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

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

Choose 2 option

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5. System Catalog tables begin with which prefix?

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6. Which 3 databases exist directly after cluster initialization?

choose 3 options

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7. Which of below are predefined schemas?

choose 3

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

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

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10. The default Page size is 2k?

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11. What is the purpose of the template1 database?

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

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

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

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15. What is the purpose of wal writer?

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

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17. What column in system catalogs servers as the Primary Key

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

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19. What is the purpose of the visibility map?

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

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

2 / 10

2. The SQL standard specifies three isolation levels?

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3. Which of the below are valid Isolations Levels?

choose 2

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

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

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

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

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

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

Select more than 1 answer below:

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

2 / 10

2. Information about subtransactions is stored under?

3 / 10

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

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

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

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

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

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8. indexes do not use row versioning?

9 / 10

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

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10. In Postgres, tables are often referred to as which of the below?

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