It's input I think, not that sure, but I just know that it reads data from a disc and then views them onto the computer screen. :)
An optical drive is an input and output device. It reads data from optical discs like CDs and DVDs (input) and writes data to these discs (output).
Neither. Is Your hard drive input or output? Neither. It is simply a storage device as a flash drive or internal optical drive would be.
It scans and input data into a PC. (Input device)
Input device
No a disk drive is neither input or output device, it is an optical disk drive (for CD/DVD's) and a disk drive (for hard drives) would be a storage device.
Mechanical input device
Yes, OCR or Optical Character Recognition is an input device.
No, it is an input device as it reads (and does not write)
A CDROM drive is neither an input device or an output device. A CDROM drive is a storage device.
Optical mouse
Optical mouse
input