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

2 / 20

2. Each Database has its own System Catalog?

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

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4. The information_schema schema provides information on Postgres release notes?

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5. Which of below are predefined schemas?

choose 3

6 / 20

6. What is the point of the pg_global tablespace?

7 / 20

7. What is the name of the 2 default tablespaces created after initialization?

choose 2

8 / 20

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

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9. Which fork is specific for unlogged tables?

10 / 20

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

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11. Users should not modify the template0 database

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

13 / 20

13. What is the purpose of wal writer?

14 / 20

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

15 / 20

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

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

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

18 / 20

18. Which of below are predefined schemas?

choose 2

19 / 20

19. Which fork contains the actual table data?

20 / 20

20. Tablespaces are used to define physical data layout?

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

3 / 10

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

4 / 10

4. non-repeatable read anomaly occurs when?

5 / 10

5. Which of the below are valid Isolations Levels?

choose 2

6 / 10

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

choose 3

7 / 10

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

8 / 10

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

9 / 10

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

10 / 10

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

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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. indexes do not use row versioning?

3 / 10

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

4 / 10

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

5 / 10

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

6 / 10

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

7 / 10

7. Page free space can often become fragmented?

8 / 10

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

9 / 10

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

10 / 10

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

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