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 name of the system catalog table for relations?

2 / 20

Which fork is specific for unlogged tables?

3 / 20

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

4 / 20

What is the process first launched at server start?

5 / 20

Each Database has its own System Catalog?

6 / 20

Postgres server spawns a new backend session for each connection?

7 / 20

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

8 / 20

Which 3 databases exist directly after cluster initialization?

choose 3 options

9 / 20

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

choose 2

10 / 20

Which of below are predefined schemas?

choose 3

11 / 20

System Catalog tables begin with which prefix?

12 / 20

What is the default standard size for a fork file?

13 / 20

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

14 / 20

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

15 / 20

What is the purpose of the template0 database?

16 / 20

Each tablespaces can only be assigned for use by one database

17 / 20

Which of below are predefined schemas?

choose 2

18 / 20

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

Choose 2 option

19 / 20

What column in system catalogs servers as the Primary Key

20 / 20

The information_schema schema provides information on Postgres release notes?

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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

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

Select more than 1 answer below:

2 / 10

Which of the below would best describe a dirty read?

3 / 10

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

choose 3

4 / 10

non-repeatable read anomaly occurs when?

5 / 10

Which parameters sets the database default isolation level?

6 / 10

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

7 / 10

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

8 / 10

Which of the below are valid Isolations Levels?

choose 2

9 / 10

What is the default Isolation Level?

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

Each page has a layer that usually consists of?

choose 2

2 / 10

indexes do not use row versioning?

3 / 10

To identify different versions of one and the same row, PostgreSQL marks each of them with which two value?

4 / 10

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

5 / 10

In Postgres, tables are often referred to as which of the below?

6 / 10

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

7 / 10

Page free space can often become fragmented?

8 / 10

a transaction containing a savepoint is will still be considered as only a single transaction?

9 / 10

CLOG files are stored in which directory?

10 / 10

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

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