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 command is used to create the Postgres cluster?

2 / 20

TOAST tables reside in a seperate schema?

3 / 20

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

choose 2

4 / 20

What is the purpose of the template1 database?

5 / 20

The information_schema schema provides information on Postgres release notes?

6 / 20

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

7 / 20

What is the purpose of the visibility map?

8 / 20

What is the purpose of the postgres database?

9 / 20

What column in system catalogs servers as the Primary Key

10 / 20

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

11 / 20

It is the postmasters job to listener for incoming connections?

12 / 20

What is the process first launched at server start?

13 / 20

A schema can belong to more than one database?

14 / 20

System Catalog tables begin with which prefix?

15 / 20

Users should not modify the template0 database

16 / 20

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

17 / 20

What is the purpose of wal writer?

18 / 20

What is the name of the directory that contains the files related to the Postgres cluster?

19 / 20

Files are logically split into pages?

20 / 20

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

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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

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

Select more than 1 answer below:

2 / 10

What is the default Isolation Level?

3 / 10

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

4 / 10

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

5 / 10

The SQL standard specifies three isolation levels?

6 / 10

Which of the below are valid Isolations Levels?

choose 2

7 / 10

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

8 / 10

non-repeatable read anomaly occurs when?

9 / 10

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

10 / 10

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

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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 Pages are never cached in memory?

2 / 10

Which 2 items does a Virtual XID consist of?

3 / 10

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

4 / 10

If a transaction aborts, all page changes are reverted(rolled back) in place?

5 / 10

The page header is located in the highest address?

6 / 10

CLOG files are stored in which directory?

7 / 10

CLOG contains how many bits for each transaction?

8 / 10

To identify different versions of one and the same row, PostgreSQL marks each of them with which two value?

9 / 10

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

10 / 10

UPDATE can be regarded as which 2 separate operations?

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