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. Tablespaces are used to define physical data layout?

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

3 / 20

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

choose 3

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4. What is the purpose of the template1 database?

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5. Which 3 databases exist directly after cluster initialization?

choose 3 options

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6. System Catalog tables begin with which prefix?

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7. What is the point of the pg_global tablespace?

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

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

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

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

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

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

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14. A schema can belong to more than one database?

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

Choose 2 option

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

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

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

19 / 20

19. TOAST tables reside in a seperate schema?

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

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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 SQL standard specifies three isolation levels?

2 / 10

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

3 / 10

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

4 / 10

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

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

6 / 10

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

7 / 10

7. Which of the below are valid Isolations Levels?

choose 2

8 / 10

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

9 / 10

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

Select more than 1 answer below:

10 / 10

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

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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. status of a subtransaction is written into CLOG?

2 / 10

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

3 / 10

3. Information about subtransactions is stored under?

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

5 / 10

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

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

7 / 10

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

8 / 10

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

9 / 10

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

10 / 10

10. index row headers like table row headers contain xmin and xmax fields?

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