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. To be able to restore data consistency, Postgres maintains

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

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3. Which 3 databases exist directly after cluster initialization?

choose 3 options

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

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

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6. Each Database has its own System Catalog?

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7. Tablespaces are used to define physical data layout?

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

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9. What is the purpose of the postgres database?

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10. The default Page size is 2k?

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11. What is the name of the directory that contains the files related to the Postgres cluster?

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

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13. What is the purpose of the public schema?

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

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

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

choose 2

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17. What is the purpose of the visibility map?

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18. What is the default standard size for a fork file?

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19. What is the purpose of autovacuum?

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

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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?

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

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5. The SQL standard specifies three isolation levels?

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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. Which parameters sets the database default isolation level?

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8. non-repeatable read anomaly occurs when?

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

10 / 10

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

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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. Rows of TOAST tables are handled in such a way that they are never update?

2 / 10

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

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

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4. CLOG contains how many bits for each transaction?

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5. In Postgres, tables are often referred to as which of the below?

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6. The page header stores checksum and the sizes of the other parts of the page?

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

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8. The page Special Space is located at the start of the page with highest address

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

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

choose 2

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