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 is the purpose of the public schema?

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

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

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4. What is the purpose of the template1 database?

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

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

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7. The default Page size is 2k?

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

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

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

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

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12. Users should not modify the template0 database

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13. What is another name for the postgres process?

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

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15. Which fork is specific for unlogged tables?

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

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17. What is the purpose of the template0 database?

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

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

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20. A schema can belong to more than 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. The more locks a transaction acquires, the better it is isolated from other transactions?

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

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

choose 3

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4. A phantom read anomaly occurs when?

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

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

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

Select more than 1 answer below:

9 / 10

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

10 / 10

10. The SQL standard specifies three 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. Page free space can often become fragmented?

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

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

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

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

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6. Which 2 of the below represent transaction IDs used for row versioning?

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7. CLOG files are stored in which directory?

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8. What does an Item Pointer contain?

choose 3

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

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