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

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

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3. Users should not modify the template0 database

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

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5. System Catalog tables begin with which prefix?

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6. Which of below are predefined schemas?

choose 3

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

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8. What is a schema?

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

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

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11. Which fork contains the actual table data?

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

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

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

choose 2

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

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16. Postgres uses a thread based process model?

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

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

choose 3

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

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20. Which 3 databases exist directly after cluster initialization?

choose 3 options

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

2 / 10

2. The SQL standard specifies three isolation levels?

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

4 / 10

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

choose 3

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

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6. Which parameters sets the database default isolation level?

7 / 10

7. non-repeatable read anomaly occurs when?

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

10 / 10

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

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

2 / 10

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

3 / 10

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

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4. psql provides a special mode that allows you to continue a transaction after a failure?

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

choose 2

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

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

8 / 10

8. Tuples can also be referred to as columns?

9 / 10

9. Information about subtransactions is stored under?

10 / 10

10. status of a subtransaction is written into CLOG?

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