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

What is the purpose of wal writer?

2 / 20

What column in system catalogs servers as the Primary Key

3 / 20

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

4 / 20

Users should not modify the template0 database

5 / 20

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

6 / 20

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

choose 2

7 / 20

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

8 / 20

Postgres server spawns a new backend session for each connection?

9 / 20

What command is used to create the Postgres cluster?

10 / 20

Postgres by default has built in connection pooling abilities?

11 / 20

What is another name for the postgres process?

12 / 20

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

13 / 20

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

14 / 20

A schema can belong to more than one database?

15 / 20

The default Page size is 2k?

16 / 20

Which 3 databases exist directly after cluster initialization?

choose 3 options

17 / 20

What is the purpose of the template0 database?

18 / 20

What is a schema?

19 / 20

Which fork is specific for unlogged tables?

20 / 20

To be able to restore data consistency, Postgres maintains

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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

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

2 / 10

Which of the below are valid Isolations Levels?

choose 2

3 / 10

Which of the below would best describe a dirty read?

4 / 10

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

5 / 10

Which parameters sets the database default isolation level?

6 / 10

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

choose 3

7 / 10

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

8 / 10

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

9 / 10

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

10 / 10

The SQL standard specifies three 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

The page header is located in the highest address?

2 / 10

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

3 / 10

indexes do not use row versioning?

4 / 10

CLOG Pages are never cached in memory?

5 / 10

Information about subtransactions is stored under?

6 / 10

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

7 / 10

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

8 / 10

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

9 / 10

Tuples can also be referred to as columns?

10 / 10

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

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