Which extension denotes a bitmap image format used by Windows?

• A. .PNG
• B. .GIF
• C. .MPEG
• D. .BMP

Answer: (D)

Bitmap image formats store images as a grid of individual pixels. Windows uses a native bitmap format with the .BMP extension, which is why this extension denotes a Windows bitmap image. BMP files typically include a header with metadata (like width, height, and color depth) followed by the pixel data, and they can be uncompressed or only lightly compressed, resulting in larger file sizes compared to some other formats.

In contrast, PNG is a portable web image format with lossless compression and alpha transparency, GIF is an older format with a limited color palette and sometimes animation, and MPEG is a video compression standard—not a still image format. So the extension that represents a Windows bitmap image is BMP.