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. Each Database has its own System Catalog?

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2. The default Page size is 2k?

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3. System Catalog tables begin with which prefix?

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4. What is the purpose of autovacuum?

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

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6. Which fork contains the actual table data?

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

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

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

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

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11. What is the purpose of the visibility map?

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12. What is the purpose of the template1 database?

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

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

choose 3

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

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

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17. Users should not modify the template0 database

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

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

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

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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 parameters sets the database default isolation level?

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

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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 are valid Isolations Levels?

choose 2

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6. A phantom read anomaly occurs when?

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

8 / 10

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

9 / 10

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

10 / 10

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

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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?

2 / 10

2. CLOG contains how many bits for each transaction?

3 / 10

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

choose 2

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4. virtual IDs exist only in PGDATA/pg_vxid when not cached?

5 / 10

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

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

7 / 10

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

8 / 10

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

9 / 10

9. indexes do not use row versioning?

10 / 10

10. Which 2 items does a Virtual XID consist of?

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