WorksheetsDigital Electronics
Total questions: 20
Worksheet time: 10mins
Which of the following logical operations is represented by the + sign in Boolean algebra?
inversion
AND
OR
complementation
What is the result of the logical operation A AND B when A is true and B is false?
true
false
undefined
error
In Boolean algebra, which operation is represented by the * sign?
AND
OR
NOT
XOR
Which of the following is the complement of the Boolean variable A?
A
1
0
NOT A
The output of a NOR gate is HIGH if ________.
all inputs are HIGH
any input is HIGH
any input is LOW
all inputs are LOW
What is the result of the logical operation A OR B when A is false and B is true?
true
false
undefined
error
If a 3-input AND gate has eight input possibilities, how many of those possibilities will result in a HIGH output?
1
2
7
8
The Boolean expression for a 3-input AND gate is ________.
X = AB
X = ABC
X = A + B + C
X = AB + C
The output of a NOT gate is HIGH when ________.
the input is LOW
the input is HIGH
power is applied to the gate's IC
power is removed from the gate's IC
How is a J-K flip-flop made to toggle?
J = 0, K = 0
J = 1, K = 0
J = 0, K = 1
J = 1, K = 1
A J-K flip-flop is in a "no change" condition when ________.
J = 1, K = 1
J = 1, K = 0
J = 0, K = 1
J = 0, K = 0
What does the triangle on the clock input of a J-K flip-flop mean?
level enabled
edge-triggered
In a 6-bit Johnson counter sequence there are a total of how many states, or bit patterns?
2
6
12
24
How many flip-flops are required to make a MOD-32 binary counter?
3
45
5
6
The terminal count of a modulus-11 binary counter is ________.
1010
1000
1001
1100
The binary numbers A = 1100 and B = 1001 are applied to the inputs of a comparator. What are the output levels?
A > B = 1, A < B = 0, A < B = 1
A > B = 0, A < B = 1, A = B = 0
A > B = 1, A < B = 0, A = B = 0
A > B = 0, A < B = 1, A = B = 1
What is the maximum count of states in a 4-bit binary counter?
8
16
4
32
Which of the following represents the NAND operation in Boolean algebra?
X = A * B
X = (A * B)'
X = A + B
X = A + B'
In a binary counter, what is the maximum count of states for a 3-bit counter?
4
6
8
16
Which of the following represents the XOR operation in Boolean algebra?
X = A + B
X = A * B
X = A ⊕ B
X = (A * B)'
