Which image format is the standard for compressing image data and is the most common?

• A. PNG
• B. TIFF
• C. JPEG
• D. BMP

Answer: (C)

For photographs, you want a format that reduces file size while keeping viewing quality acceptable. JPEG fits that need by using lossy compression that removes image data the human eye is less likely to notice. This approach dramatically drops file sizes compared to lossless formats, making it ideal for web use, sharing, and storage. JPEG’s balance of decent image fidelity, small file sizes, and broad support across cameras, apps, and devices is why it became the standard for compressing image data and remains the most common choice. It handles full color depth (24-bit) and offers adjustable quality so you can tune how much detail you’re willing to trade for smaller files.

By contrast, formats like PNG are lossless and excel with sharp edges or transparency but produce larger files for photos; TIFF is geared toward high-end printing and archival use; BMP is largely outdated and inefficient for modern web use.