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. Some System Catalog tables are common to all databases in the cluster?

2 / 20

2. A Postgres cluster consists of 2 or more physical servers accessing one Postgres Instance?

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

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4. Tablespaces can be used to segregate data based on performance needs?

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5. What is the purpose of the template1 database?

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

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7. What is the purpose of the postgres database?

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

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

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10. What is a schema?

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

Choose 2 option

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12. Postgres uses a thread based process model?

13 / 20

13. Files are logically split into pages?

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14. TOAST tables reside in a seperate schema?

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

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

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

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

19 / 20

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

20 / 20

20. What is the purpose of wal writer?

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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 parameters sets the database default isolation level?

2 / 10

2. Which of the below are valid Isolations Levels?

choose 2

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3. The SQL standard specifies three isolation levels?

4 / 10

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

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

7 / 10

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

8 / 10

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

9 / 10

9. A phantom read anomaly occurs when?

10 / 10

10. Lost updates are forbidden by the standard at all 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. indexes do not use row versioning?

2 / 10

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

3 / 10

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

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

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5. Postgres table physical data files are always cross compatible across platforms?

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

7 / 10

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

8 / 10

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

9 / 10

9. Indexes values also support multi versioning with several versions of an index value existing at any point in time?

10 / 10

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

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