Computer Hacking Forensic Investigator (CHFI) — Question 71

What technique is used by JPEGs for compression?

Answer options

• A. ZIP
• B. TCD
• C. DCT
• D. TIFF-8

Correct answer: C

Explanation

The correct answer is C, DCT (Discrete Cosine Transform), which is the core technique used by JPEG to reduce file size by transforming spatial domain data into frequency domain data. Options A (ZIP) and D (TIFF-8) refer to different compression methods not specific to JPEG, while B (TCD) is not a recognized compression technique.