4. Can a prospective employer record my ID card number or collect a copy of my ID card when I attend a job interview?

In order to check whether you have applied for or held a position in the company before, the prospective employer can collect your ID card number. However, a copy of your ID card should not be collected unless and until you become an employee of that company.

As regards the retention of personal data of unsuccessful job applicants, please refer to the relevant question and answer.