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. Postgres by default has built in connection pooling abilities?

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

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

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

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

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6. What is the purpose of the visibility map?

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7. What is the purpose of the template0 database?

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

choose 3

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9. What is the purpose of the template1 database?

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10. System Catalog tables begin with which prefix?

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11. What is the name of the system catalog table for relations?

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12. The information_schema schema provides information on Postgres release notes?

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

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14. Which fork is specific for unlogged tables?

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15. Which of below are predefined schemas?

choose 3

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

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17. Users should not modify the template0 database

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18. The default Page size is 2k?

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

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20. What is the purpose of the public schema?

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

2 / 10

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

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3. The SQL standard specifies three isolation levels?

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4. What is the default Isolation Level?

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

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

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8. A phantom read anomaly occurs when?

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

10 / 10

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

choose 3

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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 2 items does a Virtual XID consist of?

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3. CLOG files are stored in which directory?

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

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5. When a transaction is committed Postgres uses a special <replace with answer> structure?

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6. CLOG Pages are never cached in memory?

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7. The page header is located in the highest address?

8 / 10

8. Information about subtransactions is stored under?

9 / 10

9. status of a subtransaction is written into CLOG?

10 / 10

10. indexes do not use row versioning?

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