This sample quality assurance resume is written in the chronological style, which means it includes work history and education sections, but no summary of skills.
I tend to prefer the combination format because it offers more flexibility in terms of how you showcase yourself, and it makes your most crucial skills easy to find at a glance. However, the chronological style is a completely reasonable option for a job seeker who has a solid work history.
Here is an explanation of why this chronological quality assurance resume was formatted in this specific style.