Elixir 2

Question 1

The Brazilian software engineer who created Elixir in 2011.

Answer 1

José Valim

Question 2

The company co-founded by José Valim, known for work in Ruby and Rails.

Answer 2

Plataformatec

Question 3

The virtual machine that Elixir runs on, originally created for telecom systems.

Answer 3

BEAM (Erlang Virtual Machine)

Question 4

The month and year when Elixir v0.5 was first published.

Answer 4

May 2012

Question 5

The latest version of Elixir as of October 2025.

Answer 5

Version 1.19

Question 6

Elixir’s build tool that handles creating, compiling, and testing projects.

Answer 6

Mix

Question 7

Elixir’s interactive shell that provides auto-complete and debugging tools.

Answer 7

IEx

Question 8

The high-performance web framework built on Elixir for real-time applications.

Answer 8

Phoenix Framework

Question 9

The programming paradigm that Elixir follows.

Answer 9

Functional programming

Question 10

The philosophy that allows Elixir systems to recover gracefully from failures.

Answer 10

“Let it crash” philosophy

Question 11

Three companies that have adopted Elixir into their architecture.

Answer 11

Pinterest, Motorola, and Discord

Question 12

José Valim created Elixir because Ruby’s concurrency model made it difficult to take advantage of multi-core processors.

Answer 12

True

Question 13

Elixir requires specialized hardware to run.

Answer 13

False

Question 14

Elixir is statically typed.

Answer 14

False (Elixir is dynamically typed)

Question 15

Elixir source code is compiled into BEAM bytecode before execution.

Answer 15

True

Question 16

Data in Elixir can be changed after it is created.

Answer 16

False (Elixir emphasizes immutable data)

Question 17

Elixir is fully compatible with the Erlang ecosystem.

Answer 17

True

Question 18

The Phoenix Framework is used for building scalable, real-time web applications.

Answer 18

True

Question 19

Elixir uses an interpreter as its translator program.

Answer 19

False (Elixir uses a compiler)

Question 20

Hot code swapping allows updating code without stopping the system.

Answer 20

True

Question 21

.exs files are used for compiled Elixir source code.

Answer 21

False (.exs files are for scripts interpreted at runtime; .ex files are compiled)

Question 22

BEAM was originally created to power telecom systems.

Answer 22

True

Question 23

Elixir can only run on Linux operating systems.

Answer 23

False (Elixir runs on Linux, macOS, and Windows)

Question 24

Elixir emphasizes lightweight processes and message-passing approach.

Answer 24

True

Question 25

Pattern matching in Elixir allows matching data structures and extracting values based on their shape.

Answer 25

True

Question 26

José Valim published the first version of Elixir in 2015.

Answer 26

False (v0.5 was published in May 2012)

Question 27

Elixir is suitable for IoT backends and financial systems.

Answer 27

True

Question 28

Mix only handles compiling Elixir projects.

Answer 28

False (Mix also handles creating, testing, and managing dependencies)

Question 29

Elixir version 1.19 brought improvements to the type system and compilation times.

Answer 29

True