When analyzing Dexter's situation regarding his application for the front desk clerk position, the aspect that will not impact his chances of getting the job is:
The applicant is expected to do filing and data capturing, and Dexter is not entirely sure what that entails.
This is because while having knowledge of filing and data capturing would be beneficial, not understanding what it entails does not disqualify him from consideration. Employers often provide training for tasks that new employees may not be familiar with.
In contrast, the other factors—lack of experience with Excel, communication skills affected by a speech impediment, and not having the full five years of office experience—are more likely to have a direct impact on his suitability for the role as they relate more closely to essential job functions and requirements.