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. Tablespaces are used to define physical data layout?

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

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3. Users should not modify the template0 database

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

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5. How does Postgres know which schema to use if not specified?

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

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

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8. Which of below are predefined schemas?

choose 2

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

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

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

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12. Which 3 databases exist directly after cluster initialization?

choose 3 options

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13. Which of below are predefined schemas?

choose 3

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

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

choose 3

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

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17. What is the purpose of the template1 database?

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

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19. What is the purpose of the visibility map?

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

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2. What is the default Isolation Level?

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

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

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5. Which parameters sets the database default isolation level?

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

Select more than 1 answer below:

7 / 10

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

choose 3

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

9 / 10

9. non-repeatable read anomaly occurs when?

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. What does an Item Pointer contain?

choose 3

2 / 10

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

3 / 10

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

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

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

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6. CLOG files are stored in which directory?

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7. Information about subtransactions is stored under?

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8. When a row is created, its xmin value is set to the transaction ID of which command?

9 / 10

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

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10. Page free space can often become fragmented?

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