Resources/Glossary/Recruiting
A knockout question is a yes or no screening question that removes applicants who miss a true requirement, such as a required license, certification or legal right to work. Keep them few, essential and lawful.
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A yes or no screening question that removes applicants who miss a true requirement, such as a license or work authorization. Keep them few and lawful.
Knockout questions sit in the application form or a chatbot screen. If an applicant answers no to “Do you hold an active CDL Class A license?”, the system can reject them automatically or move them to a separate list. It saves recruiters from reading applications that could never move forward, and it gives the applicant a quick, clear answer instead of silence.
They work best for hard requirements that are easy to verify later: a license, a shift the person must be able to work, a minimum age required by law for the job, or eligibility to work in the country. They work badly for soft skills or anything a candidate could learn quickly on the job. Every knockout question needs to be job related. Questions that touch protected traits, or requirements that screen out groups unfairly without a real business need, can create discrimination risk.
For high volume roles, a few good knockout questions save hours of screening and give unqualified applicants a fast answer. But each extra question also loses good people. An auto reject on “five years of experience” can drop strong candidates with four and a half. Treat every knockout as a decision you would defend to a hiring manager and to a regulator.
A home care agency gets 300 applications a week for caregiver roles. It adds three knockout questions: valid driver’s license, able to work weekends, and willing to complete a background check. Applicants who answer no get a polite automated reply. The recruiter’s screening list drops to 120 a week, and phone screens now focus on experience and fit.
Do you hold an active RN license in this state? Are you able to work night shifts? Are you legally authorized to work in the US? Can you lift 50 pounds with or without reasonable accommodation? Each ties to a real job requirement.
Yes, when they are job related and do not target protected traits. Ask whether someone is authorized to work, not their citizenship. Rules vary by state, so check local law. This is not legal advice.
As few as possible, usually two to four. Each one adds friction and can screen out good candidates, so keep only the requirements that would truly rule someone out.
Written by recruiters at Work Insiders. Part of the recruiting and HR tech glossary. Updated October 2026.