WorksheetsUNIT - 3 LOGICAL GATES
Total questions: 53
Worksheet time: 27mins
Name
Class
Date
1.
Which of the following parameter is used to represent the symbol of logic gate?
a)
Boolean Expression
b)
Logic Symbol
c)
Timing Diagram
d)
Truth Table
2.
Which of the following parameter will give the possible input-output combinations of a logic gate?
a)
Boolean Expression
b)
Logic Symbol
c)
Timing Diagram
d)
Truth Table
3.
Which of the following parameter is used to represent equation or expression of logic gate?
a)
Boolean Expression
b)
Logic Symbol
c)
Timing Diagram
d)
Truth Table
4.
Which of the following parameter is used to represent graphical representation of input and output signals of logic gate wrt time?
a)
Boolean Expression
b)
Logic Symbol
c)
Timing Diagram
d)
Truth Table
5.
When used with an Logic Gate IC, what does the term "QUAD" indicate?
a)
IC with 2 logic gates
b)
IC with 4 logic gates
c)
IC with 6 logic gates
d)
IC with 8 logic gates
6.
Which of the following logic gate is NOT a type of basic gate?
a)
AND Gate
b)
OR Gate
c)
NOT Gate
d)
NOR Gate
7.
Which of the following logic gate is an Universal gate?
a)
AND Gate
b)
OR Gate
c)
NAND Gate
d)
EX-OR Gate
8.
Which of the following type of logic gate performs basic logic functions?
a)
Basic Gates
b)
Exclusive Gates
c)
Universal Gates
d)
None of the above
9.
Which of the following logic gate performs complementation?
a)
AND Gate
b)
OR Gate
c)
NOT Gate
d)
NAND Gate
10.
Which of the following logic gate performs logical addition?
a)
AND Gate
b)
OR Gate
c)
NOT Gate
d)
NAND Gate
11.
Which of the following logic gate performs logical multiplication?
a)
AND Gate
b)
OR Gate
c)
NOT Gate
d)
NAND Gate
12.
Identify the logic gate, where the normally open switches are connected in parallel as inputs and Lamp as output?
a)
AND Gate
b)
OR Gate
c)
NOT Gate
d)
NAND Gate
13.
Identify the logic gate, where the normally open switches are connected in series as inputs and Lamp as output?
a)
AND Gate
b)
OR Gate
c)
NOT Gate
d)
NAND Gate
14.
If either of inputs A or B of a logic gate is true, then output Q is true. Identify the logic gate.
a)
AND Gate
b)
OR Gate
c)
NOT Gate
d)
NAND Gate
15.
If both of inputs A or B of a logic gate is true, then output Q is true. Identify the logic gate.
a)
AND Gate
b)
OR Gate
c)
NOT Gate
d)
NAND Gate
16.
Which of the following type of logic gate performs function of any logic gate or any Boolean expression?
a)
Basic Gates
b)
Exclusive Gates
c)
Universal Gates
d)
None of the above
17.
Which of the following logic gate performs Complement of OR Operation?
a)
AND Gate
b)
NOR Gate
c)
NOT Gate
d)
NAND Gate
18.
Which of the following logic gate performs Complement of AND Operation?
a)
AND Gate
b)
NOR Gate
c)
NOT Gate
d)
NAND Gate
19.
If either of inputs A or B are LOW, then output Q is HIGH. Identify the logic gate.
a)
AND Gate
b)
OR Gate
c)
NOT Gate
d)
NAND Gate
20.
If and ONLY if both the inputs A and B are LOW, then output Q is HIGH. Identify the logic gate.
a)
NOR Gate
b)
OR Gate
c)
NOT Gate
d)
NAND Gate
21.
Which of the following type of logic gate performs special logic functions?
a)
Basic Gates
b)
Exclusive Gates
c)
Universal Gates
d)
None of the above
22.
If both the inputs A and B are at DIFFERENT voltage levels, then ouptut Q is true”. Identify the logic gate.
a)
OR Gate
b)
EX-OR Gate
c)
NOR Gate
d)
NAND Gate
23.
If both the inputs A and B are at SAME voltage levels, then ouptut Q is true”. Identify the logic gate.
a)
OR Gate
b)
EX-OR Gate
c)
NOR Gate
d)
EX-NOR Gate
24.
Identify the logic gate which is suitable for bit comparison.
a)
Two input OR Gate
b)
Two input EX-OR Gate
c)
Two input NOR Gate
d)
Two input EX-NOR Gate
25.
An EX-OR gate output is HIGH if _______________________.
a)
it has ODD no. of 1s in the inputs
b)
it has EVEN no. of 1s in the inputs
c)
it has ALL inputs are 0s
d)
it has ALL inputs are 1s
26.
How many NAND gate/s is/are required to build the INVERTER gate?
a)
1
b)
2
c)
3
d)
4
27.
How many NAND gates are required to build the AND gate?
a)
1
b)
2
c)
3
d)
4
28.
How many NAND gates are required to build the OR gate?
a)
1
b)
2
c)
3
d)
4
29.
How many NAND gates are required to build the NOR gate?
a)
1
b)
2
c)
3
d)
4
30.
How many NAND gates are required to build the EX-OR gate?
a)
1
b)
2
c)
3
d)
4
31.
How many NOR gate/s is/are required to build the INVERTER gate?
a)
1
b)
2
c)
3
d)
4
32.
How many NOR gates are required to build the OR gate?
a)
1
b)
2
c)
3
d)
4
33.
How many NOR gates are required to build the AND gate?
a)
1
b)
2
c)
3
d)
4
34.
How many NOR gates are required to build the NAND gate?
a)
1
b)
2
c)
3
d)
4
35.
How many NOR gates are required to build the EX-OR gate?
a)
2
b)
3
c)
4
d)
5
36.
The rise time (tr) is the time it takes for a pulse to rise from its ________ point up to its ________ point.
a)
10%, 90%
b)
90%, 10%
c)
20%, 80%
d)
80%, 20%
37.
The fall time (tf) is the length of time it takes to fall from the ________ to the ________ point.
a)
10%, 90%
b)
90%, 10%
c)
20%, 80%
d)
80%, 20%
38.
A positive-going pulse is applied to an inverter. The time interval from the leading edge of the input to the leading edge of the output is 7 ns. This parameter is ___________.
a)
speed-power product
b)
propagation delay, tPHL
c)
propagation delay, tPLH
d)
pulse width
39.
Identify the performance paremater of a logic gate which defines the time needed for an output to change from the result of an input change.
a)
speed-power product
b)
propagation delay
c)
power dissipation
d)
noise margin
40.
When will the output of logic gate experience a Worst Propogation Delay?
a)
Logic gate has MIN DELAY
b)
Logic gate has AVE DELAY
c)
Logic gate has MAX DELAY
d)
Logic gate has NO DELAY
41.
When will the output of logic gate experience a FASTEST CHANGE, when an input change is there?
a)
Logic gate has MIN DELAY
b)
Logic gate has AVE DELAY
c)
Logic gate has MAX DELAY
d)
None of the above
42.
When will the output of logic gate experience a Typical Propogation Delay?
a)
Logic gate has MIN DELAY
b)
Logic gate has AVE DELAY
c)
Logic gate has MAX DELAY
d)
Logic gate has NO DELAY
43.
Logic Gate A has tPLH = tPHL = 6 ns. Logic Gate B has tPLH = tPHL = 10 ns. Which logic gate can be operated at a higher frequency?
a)
Logic Gate A
b)
Logic Gate B
c)
Neither Logic Gate A nor Logic Gate B
d)
Either Logic GateA or Logic Gate B
44.
Identify the performance paremater of a logic gate which defines the no. of inputs to the logic gate.
a)
Rise Time
b)
Fan In
c)
Fall Time
d)
Fan Out
45.
Identify the performance paremater of a logic gate which defines the no. of inputs which can be driven by a SINGLE Logic Gate Ouput.
a)
Rise Time
b)
Fan In
c)
Fall Time
d)
Fan Out
46.
Identify the performance paremater of a logic gate which defines the PRODUCT of dc supply voltage (Vcc) & the average supply current (Iave).
a)
Rise Time
b)
Fall Time
c)
Propogation Delay
d)
Power Dissipation
47.
If a logic gate operates on a dc supply voltage of +5 V and draws an average current of 4 mA, what is its power dissipation?
a)
15 mA
b)
20 mA
c)
25 mA
d)
30 mA
48.
Identify the performance paremater of a logic gate which defines the product of propogation delay & average power dissipation.
a)
Rise Time
b)
Fall Time
c)
Speed Power Product
d)
Noise Margin
49.
Identify the performance paremater of a logic gate which is also termed as Figure of Merit.
a)
Rise Time
b)
Fall Time
c)
Speed Power Product
d)
Noise Margin
50.
Identify the unit of Speed-Power Product (SPP).
a)
seconds
b)
Watts
c)
Hertz
d)
Joules
51.
If the propagation delay of a gate is 15 ns and its Speed Power Product (SPP) is 150 pJ, what is its average power dissipation?
a)
1 mW
b)
10 mW
c)
100 mW
d)
10 W
52.
A certain gate has a propagation delay time of 6 ns and a power dissipation of 3 mW. Determine the speed-power product?
a)
9 pJ
b)
3 pJ
c)
18 pJ
d)
2 pJ
53.
Identify the performance paremater of a logic gate which defines the amount of noise that the logic gate can withstand while still functioning properly.
a)
Power Dissipation
b)
Propagation Delay Time
c)
Noise Margin
d)
Figure of Merit
100 %
