Looks like this company tries to find a robot, not people who can solve a difficult problem and learn something new. The whole interview process is not checking analytical and programming skills but a memory; not a deep understanding of the process but easy file formats and so on.
Interview questions [1]
Question 1
What file format comes from Illumina? What do Fastq files look like?
What is a BAM file? What data is in the VCF file?
How to compare the effectiveness of two variant callers?
What is sensitivity? Specificity?
The process took 2 months. I interviewed at Personalis
Interview
1 coding test and 1 behavior interview. The coding test was to write some programs within 45 minutes. The behavior interview was to discuss the reason why you are interested in bioinformatics.