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 does Postgres know which schema to use if not specified?

2 / 20

Users should not modify the template0 database

3 / 20

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

4 / 20

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

5 / 20

Which 3 databases exist directly after cluster initialization?

choose 3 options

6 / 20

What is the purpose of the public schema?

7 / 20

What is a schema?

8 / 20

What column in system catalogs servers as the Primary Key

9 / 20

What is another name for the postgres process?

10 / 20

Postgres by default has built in connection pooling abilities?

11 / 20

What is the purpose of the template1 database?

12 / 20

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

13 / 20

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

14 / 20

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

15 / 20

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

16 / 20

What is the default standard size for a fork file?

17 / 20

Postgres uses a thread based process model?

18 / 20

System Catalog tables begin with which prefix?

19 / 20

To be able to restore data consistency, Postgres maintains

20 / 20

Who is the Author of the Postgres 14 Internals book?

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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

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

2 / 10

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

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

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

5 / 10

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

choose 3

6 / 10

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

7 / 10

What is the default Isolation Level?

8 / 10

Which of the below are valid Isolations Levels?

choose 2

9 / 10

Which of the below would best describe a dirty read?

10 / 10

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

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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 files are stored in which directory?

2 / 10

Each page has a layer that usually consists of?

choose 2

3 / 10

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

4 / 10

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

5 / 10

Tuples can also be referred to as columns?

6 / 10

CLOG contains how many bits for each transaction?

7 / 10

The page header is located in the highest address?

8 / 10

CLOG Pages are never cached in memory?

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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