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

Choose 2 option

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

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3. Which of below are predefined schemas?

choose 3

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

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

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6. What is the purpose of the visibility map?

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7. Each Database has its own System Catalog?

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

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9. What is the purpose of the public schema?

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10. Which 3 databases exist directly after cluster initialization?

choose 3 options

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

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12. Postgres uses a thread based process model?

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13. What is another name for the postgres process?

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

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

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

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17. System Catalog tables begin with which prefix?

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

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19. Which of below are predefined schemas?

choose 2

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

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

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

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

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

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

choose 3

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

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9. A phantom read anomaly occurs when?

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

Select more than 1 answer below:

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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. Information about subtransactions is stored under?

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

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

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

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

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6. status of a subtransaction is written into CLOG?

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

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

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

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10. indexes do not use row versioning?

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