TvSimulation

This is a task used in the recruitment process to the company MindNexus GmbH. It has multiple purposes:

• ensure all the candidates are judged fairly by comparing the same task
• provides a solid foundation for the technical interview
• gives me understanding of your code style and quality
• hopefully is "fun" and not very long

Overview

This is a standard Phoenix project without unnecessary things:

• no ecto repo, i18n, mailer, dashboard
• replaced default / page by TvSimulationWeb.SimulationLive, which is a view you should edit
• it has instructor library https://github.com/thmsmlr/instructor_ex preconfigured to use GROQ. It's free (with some rate-limiting in place), very fast, OpenAI-compatible service giving access to many models.
• You should use llama3-70b-8192 model.

Starting

To start your Phoenix server:

• Run mix setup to install and setup dependencies
• Export GROQ_API_KEY variable in the shell: export GROQ_API_KEY=...
• Start Phoenix endpoint with mix phx.server or inside IEx with iex -S mix phx.server

Now you can visit localhost:4000 from your browser.

Instructions

Details

We’re asking you to create a simple simulation of 100 people watching 5 different channels on TV. Since we’re an AI company, instead of providing a typical dashboard we’d like to ask basic questions in a natural language.

• 1 second in simulation = 5 minutes in real life

• There are 5 TV channels: ZDF, RTL, ProSieben, Vox, Das Erste

• There are 100 people participating in the study identified by numbers 1-100

• Each participant is simulated by repeatedly:

• randomizing channel (or shutting down TV) and time (from 1 min to 120 min)

• watching that channel (or waiting for starting TV) for a given time

• Every 1 minute statistics are collected about current channel views, saved per {CHANNEL,USER}

• The study operator should be able to query statistics in natural language. For simplicity, just a few combinations should be supported now, each returning a single record. Examples:

• Give me the ID of the user who watches the most / least TV and the time?

• Give me the most / least popular channel, and it’s total watch time

• Answer should be provided in a natural language, for example:

• User 89 watched 123 minutes of TV, which is the most of all users.

• Channel VOX is the most popular, with a cumulative 900 minutes of watch time.

• The UI for asking questions & getting answers is prepared in the starting point, so you don’t have to spend time on the UI.

• clone this repository

• do all the necessary changes

• push to the PRIVATE github or gitlab repository and give me access. Public repositories won't be accepted!