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 template1 database?

2 / 20

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

3 / 20

To be able to restore data consistency, Postgres maintains

4 / 20

Which of below are predefined schemas?

choose 2

5 / 20

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

6 / 20

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

7 / 20

Each tablespaces can only be assigned for use by one database

8 / 20

What is the purpose of autovacuum?

9 / 20

What column in system catalogs servers as the Primary Key

10 / 20

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

11 / 20

Postgres by default has built in connection pooling abilities?

12 / 20

The default Page size is 2k?

13 / 20

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

14 / 20

System Catalog tables begin with which prefix?

15 / 20

Which fork is specific for unlogged tables?

16 / 20

What command is used to create the Postgres cluster?

17 / 20

What is the purpose of the template0 database?

18 / 20

Each Database has its own System Catalog?

19 / 20

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

20 / 20

Which 3 databases exist directly after cluster initialization?

choose 3 options

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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

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

choose 3

2 / 10

Which of the below are valid Isolations Levels?

choose 2

3 / 10

Which parameters sets the database default isolation level?

4 / 10

The SQL standard specifies three isolation levels?

5 / 10

What is the default Isolation Level?

6 / 10

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

7 / 10

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

8 / 10

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

9 / 10

A phantom read anomaly occurs when?

10 / 10

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

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0%

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 Pages are never cached in memory?

2 / 10

Page free space can often become fragmented?

3 / 10

Which 2 items does a Virtual XID consist of?

4 / 10

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

5 / 10

Information about subtransactions is stored under?

6 / 10

What does an Item Pointer contain?

choose 3

7 / 10

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

8 / 10

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

9 / 10

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

10 / 10

Tuples can also be referred to as columns?

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