Digital Computer Electronics – Section 1

36. A bus is a group of _____ carrying digital signals.

A. wires
B. gates
C. transistors
D. registers
E. None of the above

Correct Answer:  A. wires

37. The simplified form of the Boolean expression (X + Y + XY)(X + Z) is

A. X + Y + Z
B. XY + YZ
C. X + YZ
D. XZ + Y
E. None of the above

Correct Answer:  C. X + YZ

38. De Morgan’s first theorem says that a NOR gate is equivalent to a bubbled _____ gate.

A. AND
B. XAND
C. XOR
D. NOR
E. None of the above

Correct Answer:  A. AND

39. Addition of 102 and 112 is

A. 1002
B. 1012
C. 1112
D. 1102
E. None of the above

Correct Answer:  B. 1012

40. How many bits are required to encode all twenty-six letters ten symbols, and ten numerals?

A. 5
B. 6
C. 2
D. 3
E. None of the above

Correct Answer:  B. 6

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