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 is the purpose of the template0 database?

3 / 20

It is the postmasters job to listener for incoming connections?

4 / 20

Postgres server spawns a new backend session for each connection?

5 / 20

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

6 / 20

What is the default standard size for a fork file?

7 / 20

A Postgres cluster consists of 2 or more physical servers accessing one Postgres Instance?

8 / 20

Which fork is specific for unlogged tables?

9 / 20

What is the purpose of the visibility map?

10 / 20

Which of below are predefined schemas?

choose 2

11 / 20

Which fork keeps track of available space within pages?

12 / 20

What is a schema?

13 / 20

A schema can belong to more than one database?

14 / 20

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

15 / 20

Each tablespaces can only be assigned for use by one database

16 / 20

System Catalog tables begin with which prefix?

17 / 20

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

choose 2

18 / 20

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

19 / 20

What is the point of the pg_global tablespace?

20 / 20

What is the purpose of the public schema?

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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

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

3 / 10

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

4 / 10

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

5 / 10

Which of the below are valid Isolations Levels?

choose 2

6 / 10

Which of the below would best describe a dirty read?

7 / 10

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

8 / 10

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

Select more than 1 answer below:

9 / 10

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

10 / 10

What is the 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

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

2 / 10

CLOG files are stored in which directory?

3 / 10

Which of the below are true about a Pages Item Pointer?

4 / 10

status of a subtransaction is written into CLOG?

5 / 10

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

6 / 10

indexes do not use row versioning?

7 / 10

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

8 / 10

Which 2 items does a Virtual XID consist of?

9 / 10

Postgres table physical data files are always cross compatible across platforms?

10 / 10

What does an Item Pointer contain?

choose 3

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