Question:
Digital signals

(i) Do not provide a continuous set of values,

(ii) Represent values as discrete steps,

(iii) Can utilize binary system, and

(iv) Can utilize decimal as well as binary systems.

Which of the above statements are true?

(a) (i) and (ii) only

(b) (ii) and (iii) only

(c) (i), (ii) and (iii) but not (iv)

(d) All of (i), (ii), (iii) and (iv).

Answer:

(c) A digital signal uses the binary (0 and 1) system for transferring message signals.

Such a system cannot utilise the decimal system (which corresponds to analogue signals). Digital signals represent discontinuous values.

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