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

Choose 2 option

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

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3. Which fork is specific for unlogged tables?

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4. System Catalog tables begin with which prefix?

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

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

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7. What is the purpose of the public schema?

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

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9. Tablespaces are used to define physical data layout?

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10. What is the purpose of wal writer?

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

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

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

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

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

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16. What is another name for the postgres process?

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

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

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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. What column in system catalogs servers as the Primary Key

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

2 / 10

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

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4. A phantom read anomaly occurs when?

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5. non-repeatable read anomaly occurs when?

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

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

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

9 / 10

9. The SQL standard specifies three isolation levels?

10 / 10

10. Which of the below are valid Isolations Levels?

choose 2

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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?

2 / 10

2. CLOG Pages are never cached in memory?

3 / 10

3. Information about subtransactions is stored under?

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4. indexes do not use row versioning?

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5. When a transaction is committed Postgres uses a special <replace with answer> structure?

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

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7. CLOG contains how many bits for each transaction?

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

9 / 10

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

10 / 10

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

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