Blue Label Telecoms Software Developer interview questions

Filled in an application on their site and was sent a technical assignment to do. Fairly open ended assessment in terms of what technologies and tools you could choose to use. Was invited for an interview after submitting the assessment. Interview was with 3 people - a server systems manager, a solutions architect, - can't recall the role of the 3rd person. Questions were fairly standard HR type ones and some mild technical questions such as do you know this or that, would you choose to implement something using x or y, etc. Was notified about 3 weeks later that I was unsuccessful.