NOCTI Commercial Art Practice Test

The basic unit of a raster image?

Vectors Dots Pixels Bits

Correct Answer:

Pixels

Explanation:

Rasters are made up of tiny colored squares called pixels. These pixels form a grid, and each one holds the color value for that spot, so the whole image is a mosaic of pixels. That’s why increasing resolution adds more detail—the more pixels in the grid, the finer the image appears. Vectors, by contrast, describe shapes with mathematical formulas and scale without losing clarity. Bits are the smallest data units in storage, but the image’s basic building block is the pixel.

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