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.

1 / 20

1. What is the purpose of the visibility map?

2 / 20

2. What is a schema?

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

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4. What is another name for the postgres process?

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5. The default Page size is 2k?

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6. The pg_default tablespace should never be used to create user tables?

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7. Tablespaces are used to define physical data layout?

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8. Postgres uses a thread based process model?

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

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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 is the purpose of the postgres database?

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12. What is the point of the pg_global tablespace?

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13. Which fork contains the actual table data?

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

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

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

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17. Which fork is specific for unlogged tables?

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18. System Catalog tables begin with which prefix?

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19. To understand each other, a client and a server must use one and the same interfacing protocol?

20 / 20

20. What is the purpose of the template1 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. non-repeatable read anomaly occurs when?

2 / 10

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

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

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

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5. Which parameters sets the database default isolation level?

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

choose 3

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

Select more than 1 answer below:

8 / 10

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

9 / 10

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

10 / 10

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

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

2 / 10

2. Tuples can also be referred to as columns?

3 / 10

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

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4. CLOG files are stored in which directory?

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5. indexes do not use row versioning?

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

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7. a transaction containing a savepoint is will still be considered as only a single transaction?

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8. Page free space can often become fragmented?

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9. Indexes values also support multi versioning with several versions of an index value existing at any point in time?

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10. To identify different versions of one and the same row, PostgreSQL marks each of them with which two value?

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