Elixir Interview Questions & Answers

Question 1. What Is Elixir?

Answer :

Elixir is a dynamic, functional language. It is designed to build scalable and maintainable applications.

Question 2. Who Developed Elixir?

Answer :

Ericsson developed elixir in 1986.

Question 3. What Is The Stable Version Of Elixir?

Answer :

The stable version of Elixir is 1.5.1 and released on 1 August 2017.

Question 4. What Are The Features Of Elixir?

Answer :

The following features of Elixir are:

• Scalability
• Fault tolerance
• Functional programming
• Build tools
• Erlang Compatibility

Question 5. Which Platform Is Used To Run Elixir?

Answer :

BEAM (Erlang virtual machine) platform is used to run Elixir.

Question 6. What Is The Use Of Spawn Functions?

Answer :

The Spawn function is used to create a new process.

Example:

pid = spawn(fn -> 2 * 2 end)  

Process.alive?(pid) 

Question 7. What Is Sigils In Elixir?

Answer :

Elixir is a mechanism, used to textual representations with the language. It starts with tilde (~) character.

Question 8. How To Create A Map In Elixir??

Answer :

Map is created by using %{} syntax.

map = %{:a => 1, 2 => :b} 

Question 9. What Are The Operators In Elixir?

Answer :

There are following operators in Elixir:

• Arithmetic operators
• Comparison operators
• Boolean operators
• Misc operators

Question 10. What Do You Mean By String Interpolation In Elixir?

Answer :

String interpolation is a way to construct a new String value. The code is wrap with curly braces and '#' sign.

Example:

x = "Apocalypse"   

y = "X-men #{x}"  

IO.puts(y)  

Question 11. What Is The Use Of Crypto Module In Elixir?

Answer :

In Elixir, the crypto module is used to decrypt our project applications. It uses hashing function and digital signature.

Example:

IO.puts(Base.encode16(:crypto.hash(:sha256, "Elixir")))

Question 12. How Can We Define Structs?

Answer :

We can define Structs by using defstruct

iex> defmodule User do  

...>   defstruct name: "John", age: 27  

...> end  

Question 13. What Is Match Operator In Elixir?

Answer :

In elixir, = operator is match operator.

Example:

iex> x = 1  

1  

iex> x  

1