I have applied for a job and I have been selected as one of the top candidates that have passed for the initial interview. After all the process, We are only two left best candidates and we are required to do a technical project exercise within 1 week of deadline. Its been two days and I only finished 20%. the other 80% is still a mystery to me and I have no idea with it. I tried full research and still no growth. Before the technical project exercise, In the interview I have said to the employer that I have no experience with the 80% and they said If ever I would get hired they would train me. I really like the job and I would like to learn from it.

Note*: The company location is far from my town. They have interviewed me online and I've been doing the technical project exercise home based.

How would you say that the technical exercise is hard without the basic training from it. Or what are the other options to tackle with this kind of situation.