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

Postgres uses a thread based process model?

2 / 20

What is the default standard size for a fork file?

3 / 20

What is the purpose of autovacuum?

4 / 20

Which fork contains the actual table data?

5 / 20

Which fork is specific for unlogged tables?

6 / 20

What is the process first launched at server start?

7 / 20

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

8 / 20

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

choose 2

9 / 20

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

10 / 20

Which 3 databases exist directly after cluster initialization?

choose 3 options

11 / 20

What is the purpose of the postgres database?

12 / 20

What column in system catalogs servers as the Primary Key

13 / 20

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

14 / 20

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

15 / 20

Which of below are predefined schemas?

choose 3

16 / 20

Which fork keeps track of available space within pages?

17 / 20

What is the point of the pg_global tablespace?

18 / 20

pg_catalog schema is used to store system catalog tables?

19 / 20

What is the purpose of the public schema?

20 / 20

What is another name for the postgres process?

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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

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

2 / 10

Which of the below are valid Isolations Levels?

choose 2

3 / 10

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

4 / 10

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

5 / 10

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

6 / 10

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

choose 3

7 / 10

A phantom read anomaly occurs when?

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

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

10 / 10

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

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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

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

2 / 10

Information about subtransactions is stored under?

3 / 10

psql provides a special mode that allows you to continue a transaction after a failure?

4 / 10

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

5 / 10

The page header is located in the highest address?

6 / 10

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

7 / 10

Indexes values also support multi versioning with several versions of an index value existing at any point in time?

8 / 10

CLOG Pages are never cached in memory?

9 / 10

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

10 / 10

Each page has a layer that usually consists of?

choose 2

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