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. Which 3 databases exist directly after cluster initialization?

choose 3 options

2 / 20

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

3 / 20

3. What is the purpose of the visibility map?

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

choose 3

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5. Files are logically split into pages?

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6. What is the point of the pg_global tablespace?

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

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

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

10 / 20

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

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11. Which fork contains the actual table data?

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

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

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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. Users should not modify the template0 database

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

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

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18. Tablespaces are used to define physical data layout?

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

20 / 20

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

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

Select more than 1 answer below:

3 / 10

3. Which parameters sets the database default isolation level?

4 / 10

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

choose 3

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

6 / 10

6. Which of the below are valid Isolations Levels?

choose 2

7 / 10

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

8 / 10

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

9 / 10

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

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. at any one time Postgres can have several versions of a row?

2 / 10

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

3 / 10

3. CLOG files are stored in which directory?

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

5 / 10

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

6 / 10

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

7 / 10

7. The page header stores checksum and the sizes of the other parts of the page?

8 / 10

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

9 / 10

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

10 / 10

10. CLOG Pages are never cached in memory?

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