Elixir

Question 1

Mix

Answer 1

Elixir build tool

Question 2

Hex

Answer 2

Elixir package manager

Question 3

BEAM

Answer 3

VM for running Elixir and Erlang

Question 4

Phoenix

Answer 4

Web framework built in Elixir

Question 5

Supervisor

Answer 5

A process that supervises other processes and restarts them whenever they crash.

Question 6

Atom

Answer 6

A constant whose value is its own name. Some other languages call these symbols. Atoms are written with a colon in front of the name such as :atom.

Atoms are equal if their names are equal.

True and false are atoms in Elixir. True, false and nil are atoms that don’t require colon in the name.

Question 7

.exs

Answer 7

Elixir script file extension.

Question 8

ExUnit

Answer 8

Elixir’s built in testing framework. ExUnit tests are written in .exs files.

Tests are commonly ran with the command mix test.

Question 9

iex

Answer 9

Elixir interactive REPL.

When running with iex -S mix you can load an elixir file with the following
import ModuleName
and reload with
r ModuleName

Question 10

’’ vs “”

Answer 10

Single quotes in Elixir contain charlists. Double quotes contain normal strings. A charlist is an array of the character codes. A character code can be transferred to a character by using a question mark such as ?variable