DPI is the measurement of image resolution in terms of which unit?

• A. pixels per inch
• B. bytes per inch
• C. dots per inch
• D. bits per inch

Answer: (C)

DPI measures how many individual dots are placed within one inch of printed output. Since printing creates an image by laying down tiny ink dots, the relevant unit is dots per inch. Pixels per inch describes digital screen or image pixel density, not printed dot density, and bytes per inch or bits per inch relate to data size, not spatial resolution. So DPI correctly uses dots per inch to express print resolution.