# Introduction to Digital Systems – Exercise – 2

51. What is the decimal value of 23 ?

(a) 2
(b) 4
(c) 6
(d) 8

Explanation
Explanation : 23 = 2*2*2=8 Let us discuss.
Discuss

52. What is an analog-to-digital converter?

(a) It makes digital signals.
(b) It takes analog signals and puts them in digital format.
(c) It allows the use of digital signals in everyday life.
(d) It stores information on a CD.

Explanation
Explanation : No answer description available for this question. Let us discuss.
Discuss

53. What kind of logic device or circuit is used to store information?

(a) Counter
(b) Register
(c) Inverter
(d) Buffer

Explanation
Explanation : No answer description available for this question. Let us discuss.
Discuss

54. Serial format means digital signals are:

(a) sent over many conductors simultaneously.
(b) sent over one conductor sequentially.
(c) sent in groups of eight signals.
(d) sent in binary coded decimal.

Explanation
Explanation : No answer description available for this question. Let us discuss.
Discuss

55. Digital signals transmitted on a single conductor (and a ground) must be transmitted in:

(a) slow speed.
(b) parallel.
(c) analog.
(d) serial.