Question

What is the smallest size of data represented in a CD?
(a) blocks
(b) sectors
(c) pits
(d) tracks

Answer 1

Smallest size of data represented in a CD is option C i.e. pits

Details on the structure of pits in a CD:

CD data is represented as tiny indentations known as "pits", encoded in a spiral track molded into the top of the poly-carbonate layer. The areas between pits are known as "lands". Each pit is approximately 100 nm deep by 500 nm wide, and varies from 850 nm to 3.5 µm in length. The distance between the tracks, the pitch, is 1.6 µm.