Question

The table below describes an analog and a digital technology.

Analog Storage: VHS Cassette Digital Storage: Hard Drive

The thin plastic tape is embedded with particles of iron-oxide, which can be magnetized to store information. This information, including images and sound, is retrieved as the magnetized parts of the tape are mechanically moved through coils of wire, inducing electricity. Over time, as the magnetic strength of the particles fades, the information is altered. A rotating magnetic disk stores a variety of data types, including images and sound, using specific binary number schemes. The binary code consists of a series of 0's and 1's, which are accessed by a computer as the disk spins. The binary code remains encoded on the disk even when the hard drive is not connected to a power source.

What conclusion can be drawn about analog and digital technologies based on these examples?
A.
Digital storage of information can be easily recovered for future use.
B.
Analog storage of information is a more reliable way to transmit data.
C.
Digital storage of information works best with numerical data that can be stored using binary code.
D.
Analog storage of information can be transmitted over long distances without significant degradation.

Answer 1

A. Digital storage of information can be easily recovered for future use.

The examples show that analog (VHS) degrades as magnetic particles lose strength, altering the information, while digital (hard drive) retains its binary encoding even when powered off, so it can be reliably retrieved later.