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.

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1. What is the purpose of the template1 database?

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

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3. Files are logically split into pages?

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4. Tablespaces are used to define physical data layout?

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5. Who is the Author of the Postgres 14 Internals book?

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

choose 3

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

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8. TOAST tables reside in a seperate schema?

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9. What is the purpose of the visibility map?

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10. Which of below are predefined schemas?

choose 3

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

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12. What is the purpose of autovacuum?

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13. What is the purpose of the postgres database?

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

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

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16. Users should not modify the template0 database

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17. The default Page size is 2k?

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

19 / 20

19. What is the point of the pg_global tablespace?

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

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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 is the default Isolation Level?

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

choose 3

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

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

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

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

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

9 / 10

9. A phantom read anomaly occurs when?

10 / 10

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

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

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

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

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

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

7 / 10

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

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

9 / 10

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

10 / 10

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

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