Determine kit used for library preparation for whole exome sequencing from fastq files

Question

[Harinder]

We have sent our samples to a vendor for WES sequencing, I want to confirm which kit he used for the library preparation is there any way to confirm this from fastq or SAM files or BAM files?

[ATpoint]

You can align the data and then determine coverage over the exons, then checking which kit (based on what they promise to capture) it fits best. Or ask the people who produced the fastq. I would never guess in an analysis.