Custom job application questions allow your organization to collect information from candidates when they apply to a job post. Custom application questions are configured on a per-job basis.
How to add a custom question to an existing job application
Click All Jobs from the navigation bar and select a job from the subsequent list.
From the Job Dashboard page, click Job Setup and navigate to Job Posts on the left-hand panel.
Navigate to a job post from the list and click the Edit icon 
inline with the job post name.
From the Edit Your Job Post page, navigate to the Custom Application Questions section and click Add Custom Question.
From the Add Custom Question dialog box, input the:
- Question
- Description (optional)
- Answer type (including the option to link responses to a candidate field)
- Privacy setting
- Required or not
Note: Responses to custom application questions can only be reported on one job at a time (read more here). If you intend to report on custom application questions across many jobs, be sure to link responses to a candidate field. Linking responses to candidate fields will allow you to report on the linked candidate fields across more than one job using Greenhouse Recruiting's essential candidate reports.
When finished, click Add.
Scroll down the Edit Your Job Post page and click Save to confirm the addition of the custom application question. The custom question will be added to the job application.
