PLTW Digital Electronics – All Key Terms With Questions and Correct Solutions

PLTW Digital Electronics – Final Review & Practice
Tests With Accurate Solutions (Sets 1–3)

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Terms in this set (236)



If an integrated circuit has been Turn the power off for a few minutes before pulling
damaged and you smell smoke, you out the damaged integrated circuit.
should__________________.


In scientific notation, which prefixes Micro, nano, milli
are used for values smaller than a
whole value?


What is the value of the resistor with 6.8 K Ω ±5 %
colors blue, grey, red , gold ?


What are the color bands for a 390 Ω ORANGE-WHITE-BROWN-SILVER
(±10) resistor?


In a parallel circuit, you measure 1.5 900 m Volts
mAmps flowing through a 600 Ω
resistor. What is the voltage drop
across the resistor? Use Ohms law.


What is the decimal equivalent to the 22 power of 10
binary number 0101102?


In the eight-bit binary number shown B 0 (zero)
below, which bit is the Least
Significant Bit
(LSB)?
b7b6 b5 b4 b3 b2 b1 b0
10110101

,Which of the following is a rule of A•A=A
Boolean algebra?


1. AA • 0 = A
2. AB • 1= 1
3. A • A = A
4. AC • A = 1


What is the binary equivalent to the 1101
decimal number 1310?


What is the decimal equivalent to the 22 base 10
binary number 0101102?


What is the binary equivalent to the 11002
hexadecimal number CH


Which of the following equations is F = X' Y' Z + X' Y Z' + X Y Z'
the un-simplified Sum-Of-Products
equation for the truth table shown
below with F as the Output?


XYZ F
0000
0011
0101
0110
1000
1010
1101
1110


What is the letter symbol for current? I


Which of the following is a correct XY" = X' + Y'
DeMorgan's Identity?
1.. XY" = X'•Y'
2. XY" = X'•Y
3. XY" = X' + Y'
4. XY = X + Y

,. Which of the following is the F = Y'
simplified equivalent for the Boolean
equation shown?
F = Y' +XY'
1. F = X ''Y''
2. F = X
3. F = X Y'
4. F = Y'


Which Boolean equation is in Product- F = (X + Y)(X+ Z)(Y + Z)
Of-Sums form?


1. F = X Y Z + X Y + X Y Z
2. F = X Y Z + Z (X + Y)
3. F = (X + Y)(X+ Z)(Y + Z)
4. F = X Z(Y + Z)(Y + Z)


Which of the following Boolean F = A B' C + A B C + A
equation is in Sum-Of-Products form?
1. F = A B' C + A B C + A
2. F = (A')(B')(BC)(ABC)
3. F = (10010)11101001)
4. F = A' (B + C) A (B' + C)


What is the minimum number of flip- 4
flops needed to build a Mod-10
Asynchronous counter?
1. 32
2. 64
3. 4
4. 10

, Which of the following statements Asynchronous counters are also called ripple
applies to asynchronous counters? counters.


1. Asynchronous counters are faster
than synchronous counters.


2. Asynchronous counters require
more power than synchronous
counters.


3. All the flip-flops in an Asynchronous
counter are clocked at the same time
by a
common external clock.


4. Asynchronous counters are also
called ripple counters.


Propagation delay is The time required for a signal to travel from
_________________________. the input of a logic gate to the output.


1. A measure of the ability of a logic
gate to drive further logic gates.


2. The difference in chip temperature
from when the power is off to when
the power is on.


3. The difference between what a
logic gate outputs as a valid logic
voltage and what the input of the next
gates expects to see as a valid logic
voltage.


4. The time required for a signal to
travel from
the input of a logic gate to the output.