Question 1

What are common screen resolutions?

Accepted Answer

1920×1080 (FHD), 2560×1440 (QHD), 3840×2160 (4K). Mobile varies widely.

Question 2

What is pixel density on screens?

Accepted Answer

Pixels per inch (PPI). iPhone: ~460 PPI. MacBook: ~227 PPI. Desktop monitor: ~100 PPI.

Question 3

What's the difference between points and pixels?

Accepted Answer

Points (1/72 inch) are absolute size units for print. Pixels depend on screen resolution. At 96 DPI (common monitors): 1 point ≈ 1.33 pixels.

Question 4

Why do designers use different typography units?

Accepted Answer

Points/picas from traditional typesetting. Pixels for screen design. Em/rem for responsive web design. Each optimizes for different output media.

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