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. What command is used to create the Postgres cluster?

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2. What is the name of the 2 default tablespaces created after initialization?

choose 2

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

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

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

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6. Which fork contains the actual table data?

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

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

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

Choose 2 option

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

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11. System Catalog tables begin with which prefix?

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

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

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14. What is the purpose of the visibility map?

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15. Postgres uses a thread based process model?

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

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

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

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19. What is the purpose of wal writer?

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20. Which of below are predefined schemas?

choose 2

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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?

2 / 10

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

choose 3

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

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4. The SQL standard specifies three isolation levels?

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5. What is the default Isolation Level?

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6. Which parameters sets the database default isolation level?

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

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

9 / 10

9. Which of the below are valid Isolations Levels?

choose 2

10 / 10

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

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

2 / 10

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

3 / 10

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

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4. indexes do not use row versioning?

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5. Page free space can often become fragmented?

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6. CLOG contains how many bits for each transaction?

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

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

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

10 / 10

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

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