This company has not serious behaviour about the candidates they recruiting. They asking to do test task for them with giving you zero feedback. By my opinion that company doesn't respect the candidates .
I applied online. The process took 2 days. I interviewed at DICE (London, England) in Jan 2018
Interview
The interview was very straightforward. I was contacted by the in-house recruiter by email and we followed up with a phone interview. After completing the programming test I was invited to an interview in the office with the project manager, CTO and one of the iOS developers.
The test consisted in making a sample app that would talk to a server and had to display information received as JSON with a few simple actions.
Interview questions [1]
Question 1
Name and explain 5 most common design patterns used in iOS development