When posting electronic resumes how is open block form different from a fill in blank form

When posting an electronic résumé, how is a Open Block form different from a Fill-in-the-blank form? An Open Block form allows you to copy and paste an entire electronic résumé in a space to submit. A Fill-in-the-blank form requires to copy and paste individual sections of a résumé into a space.

Kpa - known-plaintext attack