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.

1 / 20

1. What is the purpose of the template1 database?

2 / 20

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

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

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4. Which of below are predefined schemas?

choose 3

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5. Which fork contains the actual table data?

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

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

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8. System Catalog tables begin with which prefix?

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9. What is the purpose of the template0 database?

10 / 20

10. What is the name of the mechanism used to store a row bigger than a page size?

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

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12. Who is the Author of the Postgres 14 Internals book?

13 / 20

13. Files are logically split into pages?

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14. What is another name for the postgres process?

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

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

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17. The default Page size is 2k?

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18. What is the purpose of wal writer?

19 / 20

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

20 / 20

20. What is the name of the system catalog table for relations?

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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. Which of the below are valid Isolations Levels?

choose 2

2 / 10

2. Which of the below would best describe a dirty read?

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

4 / 10

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

5 / 10

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

Select more than 1 answer below:

6 / 10

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

7 / 10

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

8 / 10

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

choose 3

9 / 10

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

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. a transaction containing a savepoint is will still be considered as only a single transaction?

2 / 10

2. CLOG Pages are never cached in memory?

3 / 10

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

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4. Information about subtransactions is stored under?

5 / 10

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

6 / 10

6. Tuples can also be referred to as columns?

7 / 10

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

8 / 10

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

9 / 10

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

10 / 10

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

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