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Our C# environment runs on top of the mono project’s implementation of the .NET runtime.

You can define multiple classes but one of them should have a static void
Main

C++17 standards are supported. GCC compiler is used with the following arguments:
g++ -std=c++17 -pthread

Nothing to explain, it should probably work.

You should define public static void main(java.lang.String[]) inside a public class.

We have added JUnit 4 for your convenience. To use it, make sure your main class is public and named Code. Here is an example:

import org.junit.*;
import org.junit.runner.*;
public class Code {
  @Test
  public void testNoop() {
    Assert.assertTrue(true);
  }
  public static void main(String[] args) {
    JUnitCore.main("Code");
  }
}

Nothing to explain, it should probably work.

You should declare a func main() in a package main, like this:

package main
import "fmt"
                        
func main() {
   fmt.Printf("Hello")
}

Nothing to explain, it should probably work.

Your code is run using NodeJS with —harmony flag on, which enables most of the ES6 features. We have also installed following npm packages for you to use:

Your code is compiled to JavaScript using tsc --strict and then run using NodeJS with —harmony flag on. We have also installed following npm packages for you to use:

Don’t forget to wrap your code in <?php and ?> tags.

We have installed following pip packages for you to use:

We have installed following pip packages for you to use:

We’re using Apple’s recently open sourced Swift implementation for Linux.

We have installed the following gems for you to use:

Here is an example code for using RSpec:

require 'rspec/autorun'

class Greet
  def print!
    'HELLO'
  end
end

RSpec.describe Greet do
  it 'prints hello' do
     expect(Greet.new.print!).to eq('HELLO')
  end
end
                    

Nothing to explain, it should probably work.

You can name the object anything you want. But you should define def main(args: Array[String]) , like this:

object HelloWorld {
   def main(args: Array[String]) = println("Hello Scala!")
}
                                                

Our VB.NET environment runs on top of the mono project’s implementation of the .NET runtime.

You can define multiple classes but one of them should have a Public Shared Sub Main().

Since we don’t run Objective-C natively on OS X. We run it using GCC. Your code is compiled with:
gcc -I/usr/include/GNUstep -L/usr/lib/GNUstep -lobjc -lgnustep-base -Wall

We know this is not a perfect way to do it so we are open to any suggestions on how to run Obj-C better.

Nothing to explain, it should probably work

Your solution should define the module as solution and export a method named start, like this:

-module(solution).
-export([start/0]).
                        
start() ->
  io:fwrite("Hello"). 
                    

You must define the module as Solution with a method named start, like this:

Code.compiler_options(ignore_module_conflict: true
defmodule Solution do
  def start() do
     IO.puts "Hello"
  end
end

Also notice the first line Code.compiler_options(ignore_module_conflict: true) which is needed by our system to work.

Nothing to explain, it should probably work.

Your bash script is run on our servers as is.

We don’t run PowerShell natively on Windows. But we use Pash which is an open-source implementation of PowerShell. If something doesn’t work right, feel free to contact us.

Web mode includes all of the popular web frameworks including React, Angular, Nextjs, Express, etc. You can also create a custom template with your own selection of NPM packages and a start script. Everyone in the interview pad is able to see the output in the embedded browser panel.

The terminal is shared between all participants and they can see the output and run commands.