Test Bank for Digital Fundamentals, 11e Thomas Floyd (All Chapters,)

Test Bank for Digital
Fundamentals, 11e
Thomas Floyd (All
Chapters,)

, Chapter 1

Name___________________________________


MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the
question.
1) Which circuit converts data from serial form to parallel form? 1) _______
A) Multiplexer B) Comparator C) Encoder D) Demultiplexer

2) Which one of the circuits listed is made up of flip-flops? 2) _______
A) A comparator B) A converter C) A register D) A multiplexer

3) The time from one leading edge on a digital waveform to the next is the waveform ________. 3) _______
A) rise time B) pulse width C) period D) fall time




Figure 1-1

4) The time between transition 1 and transition 3 in Figure 1-1 is the ________. 4) _______
A) period B) frequency C) amplitude D) pulse width

5) The output from an OR gate is HIGH ________. 5) _______
A) when at least one input is HIGH B) only when all inputs are HIGH
C) only when all inputs are LOW D) none of the above




Figure 1-3

6) The symbol in Figure 1-3(B) represents the ________ function. 6) _______
A) OR B) NON C) XOR D) AND

7) On a positive-going pulse, the leading edge is the ________. 7) _______
A) HIGH-to-LOW transition B) falling edge
C) negative-going edge D) positive-going edge

8) Of the circuits listed, the one that is most likely to be found in a CD player is a(n) ________. 8) _______
A) programmable logic device B) digital-to-analog converter
C) analog-to-digital converter D) SPLD




Figure 1-1

9) Which edge in Figure 1-1 is the trailing edge? 9) _______
A) 1 B) 2 C) 3 D) Both 1 and 3

,10) The arrow in the figure below points to pin ________. 10) ______




A) 17 B) 16 C) 5 D) 4

11) On a negative-going pulse, the leading edge is the ________. 11) ______
A) LOW-to-HIGH transition B) negative-going edge
C) positive-going edge D) rising edge

12) Which circuit converts coded information into a noncoded form? 12) ______
A) Comparator B) Encoder C) Decoder D) Multiplexer




Figure 1-3

13) The symbol in Figure 1-3(C) represents the ________ function. 13) ______
A) XOR B) NOT C) OR D) AND

14) The approximate duty cycle for the digital waveform below is ________. 14) ______



A) 20% B) 80% C) 30% D) 50%




Figure 1-4

15) The package style in Figure 1-4(C) is a(n) ________. 15) ______
A) SOIC B) PLCC C) LCCC D) FP

16) The output from an OR gate is LOW ________. 16) ______
A) only when all inputs are LOW B) whenever any input is HIGH
C) only when all inputs are HIGH D) none of the above

17) The netlist is generated during the ________ phase of the PLD programming process. 17) ______
A) design entry B) compilation C) synthesis D) download

, 18) What is the duty cycle of a digital waveform with a pulse width of 10 ms a period of 90 ms? 18) ______
A) 11.1% B) 10% C) 9% D) 90%

19) On a negative-going pulse, ________. 19) ______
A) HIGH = 1 and LOW = 0 B) HIGH = 0 and LOW = 1
C) LOW = -1 and HIGH = 1 D) HIGH = 0 and LOW = -1




Figure 1-4

20) The package style in Figure 1-4(A) is a(n) ________. 20) ______
A) SOIC B) PLCC C) LCCC D) FP

21) Which one of the following is not a surface-mount IC package? 21) ______
A) FP B) PLCC C) SOIC D) DIP




Figure 1-3

22) The symbol in Figure 1-3(A) represents the ________ function. 22) ______
A) AND B) OR C) NOT D) AND/OR




Figure 1-2

23) Item (2) of the nonideal pulse in Figure 1-2 represents the waveform ________. 23) ______
A) amplitude B) rise time C) fall time D) pulse width

24) Item (4) of the nonideal pulse in Figure 1-2 represents the waveform ________. 24) ______
A) amplitude B) rise time C) fall time D) pulse width

25) Two kinds of data selectors are ________ and ________. 25) ______
A) encoders, decoders B) comparators, registers
C) multiplexers, demultiplexers D) adders, subtractors