When preparing images for the web so that they open faster, what is screen resolution?

• A. 144 dpi
• B. 300 dpi
• C. 72 dpi
• D. 96 dpi

Answer: (C)

Screen resolution here refers to how many pixels are packed into one inch on a display. For web images, what matters is the pixel dimensions—the width and height in pixels—because browsers render images based on those numbers, not the print-style DPI. Historically, 72 dpi has been the standard reference for screens, aligning with older displays and editing tools, which keeps file sizes reasonable without changing how large the image appears on most monitors. Higher DPI values like 300, 144, or even 96 dpi are meant for print quality or different device conventions and typically increase file size without speeding up web loading. Since the goal is faster opening, using 72 dpi is the conventional choice for web images.