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Question 1 (1 point)
Saved
Which logic function can be implemented by connecting an inverter to the output of a NOR gate?
Question 1 options:

A)

NAND

B)

OR

C)

AND

D)

NOR
Question 2 (1 point)
Which device is used in computer hardware to interpret the binary code of the computer instruction?
Question 2 options:

A)

encoder

B)

demultiplexer

C)

multiplexer

D)

decoder
Question 3 (1 point)
A device which determines which of two numbers is greater is a
Question 3 options:

A)

multiplexer.

B)

counter.

C)

comparator.

D)

decoder.
Question 4 (1 point)
What is the binary value of the BCD number: 1000 0001 (81)?
Question 4 options:

A)

1000 0000

B)

0110 0011

C)

0100 0001

D)

0101 0001
Question 5 (1 point)
An even-parity checker indicates a parity error for which received data and parity bit?
Question 5 options:

A)

data = 1110000
parity = 1

B)

data = 0000000
parity = 0

C)

data = 1001001
parity = 0

D)

data = 1111111
parity = 1
Question 6 (1 point)
What is the modulus of a counter which counts from 3 to 9 and back to 3 again?
Question 6 options:

A)

MOD-9

B)

MOD-8

C)

MOD-7

D)

MOD-6
Question 7 (1 point)
A ________ is an electronic device used to convert an ac voltage into a dc voltage.
Question 7 options:

A)

photo transistor

B)

Schmitt trigger

C)

pull-up resistor

D)

rectifier
Question 8 (1 point)
A counter whose individual flip-flops can toggle only when the previous flip-flop has toggled is
Question 8 options:

A)

a ripple counter.

B)

a MOD-6 counter.

C)

an up-counter.

D)

a down-counter.
Question 9 (1 point)
Waveforms A and B represent the inputs to a NAND gate. During which time interval(s) will the output from the gate (X) be LOW?

Question 9 options:

A)

never

B)

time intervals 2, 3, and 4

C)

time intervals 2 and 3

D)

time interval 2
Question 10 (1 point)
The Boolean equation for a NAND function is
Question 10 options:

A)

X =

B)

X = AB

C)

X =

D)

X =
Question 11 (1 point)
An exclusive-NOR gate will invert the signal on input A if
Question 11 options:

A)

the output is inverted.

B)

input B is HIGH.

C)

input B is LOW.

D)

input B is the opposite of input A.
Question 12 (1 point)
In an odd-parity system, the parity bit is one
Question 12 options:

A)

when there is an even number of one bits in the data.

B)

when there is an odd number of one bits in the data.

C)

when there is an odd number of data bits.

D)

when there is an even number of one bits in the data and when there is an odd number of data bits.
Question 13 (1 point)
During which time interval(s) will output X of this XNOR timing diagram be HIGH?

Question 13 options:

A)

time interval 1

B)

time intervals 1 and 5

C)

time intervals 2, 3, and 4

D)

time interval 5
Question 14 (1 point)
An octal-to-binary encoder has eight data inputs and encodes an output of ________ bits.
Question 14 options:

A)

two

B)

three

C)

four

D)

five
Question 15 (1 point)
A flip-flop which operates according to military standards
Question 15 options:

A)

allows greater range of voltage and temperature parameters.

B)

has the same parameters as ICs that meet commercial standards.

C)

requires closer regulation of voltage and temperature conditions.

D)

allows greater temperature range but less voltage range.
Question 16 (1 point)
In an odd-parity system, which of the following will generate a LOW (0) parity bit?
Question 16 options:

A)

1000001

B)

0001101

C)

1110001

D)

all of the above
Question 17 (1 point)
A transfer function is a graph of
Question 17 options:

A)

voltage versus time.

B)

input voltage versus output voltage.

C)

speed versus time.

D)

HIGH versus LOW.
Question 18 (1 point)
Which Boolean equation results from this Karnaugh map?

Question 18 options:

A)

(AB) + (C)

B)

( ) + (C) + (BC)

C)

(ABC) +

D)

(A) + C
Question 19 (1 point)
The decimal equivalent of binary 10000110 is ________.
Question 19 options:

A)

11010

B)

13410

C)

12610

D)

14410
Question 20 (1 point)
The simplest form of X = ( + )BC is ________.
Question 20 options:

A)

BC

B)

=  + B*C

C)

=  + A*B*

D)

X =  + B*C
Question 21 (1 point)
How many XOR gates does it take to make an 8-bit controlled inverter?
Question 21 options:

A)

4

B)

8

C)

16

D)

32
Question 22 (1 point)
Two 7492 counters, one configured to count 0 to 11 and the other configured to count 0 to 1, are connected so that the Q3 output of the first is wired to the clock input of the second. What is the modulus of the total circuit?
Question 22 options:

A)

MOD-20

B)

MOD-44

C)

MOD-12

D)

MOD-24
Question 23 (1 point)
Decoders used to drive common-anode LEDs must have
Question 23 options:

A)

active LOW outputs.

B)

active HIGH outputs.

C)

a blanking output.

D)

low ripple characteristics.
Question 24 (1 point)
Anything ANDed with itself is equal to
Question 24 options:

A)

0.

B)

1.

C)

itself.

D)

its complement.
Question 25 (1 point)
Where is the least significant Q output connected on a binary ripple counter?
Question 25 options:

A)

to the SET input of the next flip-flop

B)

to the J input of the next flip-flop

C)

to the clock input of the next flip-flop

D)

to the K input of the next flip-flop
Question 26 (1 point)
Which type of flip-flop is referred to as "one's catching"?
Question 26 options:

A)

R-S

B)

D

C)

J-K

D)

toggle
Question 27 (1 point)
What is the difference between the 74192 and the 74193 counter?
Question 27 options:

A)

The 74192 is the only one that can parallel load.

B)

The 74192 is asynchronous; the 74193 is synchronous.

C)

The 74192 is a BCD counter; the 74193 is a binary counter.

D)

The 74192 counts down; the 74193 counts up.
Question 28 (1 point)
Saved
To which pin is Vcc connected on a 7476 flip-flop? (Refer to Figure 11-11 in your textbook.)
Question 28 options:

A)

pin 7

B)

pin 16

C)

pin 5

D)

pin 13
Question 29 (1 point)
Which equation demonstrates the Commutative Law?
Question 29 options:

A)

A(BC) = (AB)C

B)

A + BC = AB + C

C)

C + AB = AB + C

D)

C + B + A = ABC
Question 30 (1 point)
The simplest form of X = A(B + C) + B is ________.
Question 30 options:

A)

X = AB + B

B)

X = AC

C)

X = B + AC

D)

X = AC + B