Huawei Technologies Optical Network Engineer interview questions

I was first called by HR and had a phone interview about my background (education, family, work experience, etc). I had the technical interview the same week where we discussed about the role and their experiences on it. They also gave different scenarios and asked what I would do in those scenarios.

Basically, a candidate should present 2 interviews (technical and HR). Is very common to present the technical interview first. They ask the basic questions of optical effects as dispersion, attenuation, PMD etc. Also, a trivial understanding of capacity units is required (E1, STM1-64, Gbps). Finally but most important, they ask the candidate to depict a WDM system.