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 the template0 database?

2 / 20

Which fork keeps track of available space within pages?

3 / 20

What is the purpose of wal writer?

4 / 20

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

5 / 20

TOAST tables reside in a seperate schema?

6 / 20

What is the purpose of the template1 database?

7 / 20

Which of below are predefined schemas?

choose 3

8 / 20

What column in system catalogs servers as the Primary Key

9 / 20

What is the purpose of the visibility map?

10 / 20

Postgres by default has built in connection pooling abilities?

11 / 20

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

12 / 20

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

13 / 20

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

Choose 2 option

14 / 20

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

15 / 20

What is the point of the pg_global tablespace?

16 / 20

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

17 / 20

Tablespaces are used to define physical data layout?

18 / 20

Which 3 databases exist directly after cluster initialization?

choose 3 options

19 / 20

What is the purpose of autovacuum?

20 / 20

Which fork is specific for unlogged tables?

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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 would best describe a dirty read?

2 / 10

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

3 / 10

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

Select more than 1 answer below:

4 / 10

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

5 / 10

What is the default Isolation Level?

6 / 10

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

7 / 10

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

8 / 10

Which of the below are valid Isolations Levels?

choose 2

9 / 10

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

10 / 10

Which parameters sets the database default isolation level?

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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

CLOG contains how many bits for each transaction?

2 / 10

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

3 / 10

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

4 / 10

status of a subtransaction is written into CLOG?

5 / 10

When a row is created, its xmin value is set to the transaction ID of which command?

6 / 10

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

7 / 10

Each page has a layer that usually consists of?

choose 2

8 / 10

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

9 / 10

Which 2 items does a Virtual XID consist of?

10 / 10

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

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