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

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

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3. Each tablespaces can only be assigned for use by one database

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4. What is the process first launched at server start?

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

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6. System Catalog tables begin with which prefix?

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

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8. Files are logically split into pages?

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

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10. What is the purpose of the public schema?

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

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12. Which of below are predefined schemas?

choose 3

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

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

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15. What is the point of the pg_global tablespace?

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

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17. What is the purpose of the template1 database?

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18. Which fork is specific for unlogged tables?

19 / 20

19. Which of the below objects can be referred to as relations?

choose 3

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20. TOAST tables reside in a seperate schema?

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

2 / 10

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

3 / 10

3. Which of the below are valid Isolations Levels?

choose 2

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

Select more than 1 answer below:

5 / 10

5. Which parameters sets the database default isolation level?

6 / 10

6. A phantom read anomaly occurs when?

7 / 10

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

8 / 10

8. The SQL standard specifies three isolation levels?

9 / 10

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

10 / 10

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

Your score is

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

3 / 10

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

4 / 10

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

5 / 10

5. CLOG contains how many bits for each transaction?

6 / 10

6. Which of the below are true about a Pages Item Pointer?

7 / 10

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

8 / 10

8. UPDATE can be regarded as which 2 separate operations?

9 / 10

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

10 / 10

10. status of a subtransaction is written into CLOG?

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