Large file reading challenge

Welcome in the recruitment challenge. Write an application that, at the endpoint specified by you, returns the yearly average temperatures for a given city in the format array of objects with the following fields: year, averageTemperature.

Assumptions

CSV file with data is no less than 3GB in size.
The file represents temperature measurements in the format city;yyyy-mm-dd HH:mm:ss.SSS;temp
The content of the source file may change during the application's running

Example source file

example_file.csv

Response

Schema

response_schema

Example

[
  {
	"year": "2021",
	"averageTemperature": 12.1
  },
  {
	"year": "2022",
	"averageTemperature": 11.1
  },
  {
	"year": "2023",
	"averageTemperature": 14.1
  }
]

Usage

Temperature statistics endpoint: /api/temperatures/{city} Returns HTTP 200 when city is found, 404 otherwise.

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