A few years ago, I was referred to the business by an employee who was advertising the job at a job fair I attended during my studies.
I was invited for an interview and to complete a test (lasting 30 mins each).
The test involved having to write a letter on Microsoft word based on a scenario they provided, and using excel to demonstrate that you can use it.
About a week later, I was told I got the job and started about a month later roughly.