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

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

2 / 20

What column in system catalogs servers as the Primary Key

3 / 20

What is the default standard size for a fork file?

4 / 20

Each Database has its own System Catalog?

5 / 20

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

choose 2

6 / 20

What is the purpose of the visibility map?

7 / 20

A single Postgres Instance can server only one database?

8 / 20

What is the purpose of the template0 database?

9 / 20

Each tablespaces can only be assigned for use by one database

10 / 20

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

11 / 20

Which of below are predefined schemas?

choose 3

12 / 20

What is the purpose of the postgres database?

13 / 20

It is the postmasters job to listener for incoming connections?

14 / 20

Postgres uses a thread based process model?

15 / 20

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

16 / 20

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

17 / 20

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

Choose 2 option

18 / 20

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

19 / 20

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

20 / 20

What is the purpose of the template1 database?

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0%

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

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

3 / 10

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

4 / 10

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

choose 3

5 / 10

What is the default Isolation Level?

6 / 10

Which parameters sets the database default isolation level?

7 / 10

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

8 / 10

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

9 / 10

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

10 / 10

Which of the below are valid Isolations Levels?

choose 2

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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

Which 2 items does a Virtual XID consist of?

2 / 10

Each page has a layer that usually consists of?

choose 2

3 / 10

Page free space can often become fragmented?

4 / 10

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

5 / 10

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

6 / 10

A page along with its tuples is read into the buffer cache with compression transformations to enhance cache efficiency?

7 / 10

Information about subtransactions is stored under?

8 / 10

CLOG files are stored in which directory?

9 / 10

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

10 / 10

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

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0%