Pixel (picture element) is defined as what?

• A. A measure of color depth.
• B. A type of image compression.
• C. A networking protocol.
• D. Smallest addressable element in a display device.

Answer: (D)

Pixel is the smallest addressable element on a display, the basic unit of a digital image. It corresponds to a single point in the grid of the screen and holds color (and brightness) information for that location. By addressing each pixel individually, the display can reproduce a full image when many pixels are arranged in a grid.

Color depth affects how many colors a pixel can represent, but it doesn’t define what a pixel is. Image compression deals with reducing the data required to store or transmit an image, and networking protocols govern data transfer—these aren’t definitions of a pixel.