WorksheetsDIGITAL PART A (1-5)
Total questions: 203
Worksheet time: 3hrs 32mins
Name
Class
Date
1.
Which of the following can be considered as Continuous Value?
a)
digital clock
b)
temperature measurement
c)
parts damaged in logistics
d)
employees in a company
2.
Which of the following is NOT an analog device?
a)
Analog Voltmeter
b)
Cassette Tape
c)
Digital Watch
d)
Mechanical Watch
3.
Which of the following is NOT a digital device?
a)
Mobile Phone
b)
Dial Telephone
c)
Smart TV
d)
Digital Multimeter
4.
Which system gives more precise value?
a)
analog device
b)
digital device
c)
both have equal precision
d)
both give same output always
5.
In a system analog value was converted to digital and then again to analog. Will the value be the same as original?
a)
final value will always be less than initial
b)
can not convert digital to analog
c)
initial and final values will be equal
d)
initial and final values may differ
6.
Digital signals transmitted on a single conductor (and a ground) must be transmitted in
a)
Slow Speed
b)
Parallel
c)
Medium Speed
d)
Serial
7.
Which waveform is used to represent a Voice Signal?
a)
Sinusoidal Waveform
b)
Square Waveform
c)
Staircase Waveform
d)
Trianglular Waveform
8.
Which waveform is used to represent a Digital Signal?
a)
Sinusoidal Waveform
b)
Clock Pulse
c)
Staircase Waveform
d)
Trianglular Waveform
9.
What does parallel transmission of digital data mean?
a)
is much slower than the serial transmission of data
b)
requires only one signal line between sender and receiver
c)
requires as many signal lines between sender and receiver as there are data bits
d)
is less expensive than the serial method of data transmission
10.
What does sending digital data in serial format mean?
a)
sent over one conductor sequentially
b)
sent over many conductors simultaneously
c)
sent in groups of eight signals
d)
sent in binary coded decimal
11.
Which format can send several bits of information faster?
a)
Parallel
b)
Serial
c)
Both are the same
d)
Can't tell
12.
What is one relative DISADVANTAGE of Serial Data Transfer?
a)
It requires too many conductors
b)
Its interconnect system is complex
c)
Slow Speed of Operation
d)
It can only be used in long distances
13.
Which of the following statement is CORRECT in respect of hardware implementation?
a)
Analog System is more Flexible
b)
Digital System is more Flexible
c)
Digital System is Fixed
d)
Analog System is Programmable
14.
Which of the following is the ADVANATGE of an Analog System?
a)
More Power Consumption
b)
More Prone to Distortion
c)
Short Distance Communication
d)
Cheaper System
15.
Which of the following is the DISADVANATGE of Digital System?
a)
High Bandwidth
b)
Less Prone to Distortion
c)
Long Distance Communication
d)
Less Power Consumption
16.
Which of the following is/are CORRECT in case of an Analog System?
a)
Cheaper System
b)
Less Bandwidth
c)
Both a & b
d)
More Power Consumption
17.
Which of the following is/are CORRECT in case of DIGITAL System?
a)
Cheaper System
b)
Low Power Consumption
c)
Short Distance Communication
d)
More Prone to Distortion
18.
Which of the following is/are CORRECT in case of DIGITAL System?
a)
Cheaper System
b)
Cheaper System
c)
Cheaper System
d)
Both b & c
19.
Which of the following ranges is related to HIGH LEVEL range in TTL 5V for INPUT? TTL: Transistor- Transistor Logic uses either 3.3V or 5V power supply
a)
4.95V to 5V
b)
3.5V to 5V
c)
2.7V to 5V
d)
2V to 5V
20.
Which of the following ranges is related to HIGH LEVEL range in TTL 5V for OUTPUT?
a)
4.95V to 5V
b)
3.5V to 5V
c)
2.7V to 5V
d)
2.7V to 5V
21.
Which of the following ranges is related to HIGH LEVEL range in CMOS logic for INPUT? CMOS: Complementary metal-oxide-semiconductor use either 3.3V or 5V power supply.
a)
4.95V to 5V
b)
3.5V to 5V
c)
2.7V to 5V
d)
2.7V to 5V
22.
Which of the following ranges is related to HIGH LEVEL range in CMOS 5V for OUTPUT?
a)
4.95V to 5V
b)
3.5V to 5V
c)
2.7V to 5V
d)
2.7V to 5V
23.
Record stored voice to auidioble voice which one convert it
a)
ADC
b)
DAC
c)
AMPLIFIER
d)
SPEAKERS
24.
Which of the following ranges is related to LOW LEVEL range in TTL 5V for OUTPUT?
a)
0.05V to 0V
b)
1.5V to 0V
c)
0V to 0.5V
d)
0.8V to 0V
25.
Which of the following ranges is related to LOW LEVEL range in CMOS logic for INPUT? CMOS: Complementary metal-oxide-semiconductor use either 3.3V or 5V power supply.
a)
0.05V to 0V
b)
1.5V to 0V
c)
0V to 0.5V
d)
0.8V to 0V
26.
Which of the following ranges is related to LOW LEVEL range in CMOS 5V for OUTPUT?
a)
0.05V to 0V
b)
1.5V to 0V
c)
0V to 0.5V
d)
0.8V to 0V
27.
The interconnected circuits / Ics should be compatible. What does compatibility refer to?
a)
The output of a circuit should match with the input of another circuit
b)
The output of a circuit should match with the input of the same circuit
c)
The input of a circuit should match with the output of another circuit
d)
The input of a circuit should match with the output of same circuit
28.
In a circuit the output of a TTL logic IC is given as input to a CMOS IC. Comment on the design.
a)
Good design
b)
It will work as expected
c)
It may not work as expected
d)
None of the above
29.
The waveform that repeats itself at a fixed intervals, with a time period (T) is
a)
Positive Edge Pulse
b)
Negative Edge Pulse
c)
Periodic Pulse
d)
Non-Periodic Pulse
30.
The waveform that DOES NOT repeat itself at a fixed intervals is
a)
Positive Edge Pulse
b)
Negative Edge Pulse
c)
Periodic Pulse
d)
Non-Periodic Pulse
31.
What is the time taken by a wave to complete one cycle known as?
a)
Amplitude
b)
Time Period
c)
Frequency
d)
Duty Cycle
32.
The frequency of a pulse train is 2 kHz. Which of the following is true?
a)
2 pulses per second
b)
2000 pulses per minute
c)
2000 pulses per second
d)
200 pulses per minute
33.
A pulse has a period of 10 ms. What is Its frequency?
a)
1 Hz
b)
10 Hz
c)
100 Hz
d)
1000 Hz
34.
A pulse has a period of 15 ms. What is Its frequency?
a)
6.67 Hz
b)
66.67 Hz
c)
666.67 Hz
d)
6.66 kHz
35.
The frequency of a pulse train is 2 kHz. What is the time period?
a)
5 ms
b)
50 ms
c)
500 μs
d)
2 μs
36.
The rise time is the time it takes a pulse to go from
a)
the base line to the maximum HIGH voltage
b)
the base line to the maximum HIGH voltage
c)
10% of the pulse amplitude to the maximum HIGH voltage
d)
10% of the pulse amplitude to 90% of the pulse amplitude
37.
The fall time is the time it takes a pulse to go from
a)
the maximum HIGH voltage to the base line
b)
90% of the pulse amplitude to 10% of the pulse amplitude
c)
90% of the pulse amplitude to the maximum LOW voltage
d)
10% of the pulse amplitude to the base line
38.
A periodic digital waveform the voltage is at 5V for 10ms and 0v for 30ms. What is the duty cycle of the wave form?
a)
0.1
b)
0.3
c)
0.25
d)
0.5
39.
A periodic digital waveform has a pulse width of 6 ms and a time period of 18 ms. What is the duty cycle of the pulse?
a)
0.033
b)
0.333
c)
0.06
d)
0.18
40.
A periodic digital waveform has a duty cycle of 75%. Its time period is 200ms. What are the ONTIME and the OFFTIME of the wave?
a)
75ms, 200ms
b)
75ms, 25ms
c)
100ms, 100ms
d)
150ms, 50ms
41.
A sine wave goes from 5V to -5V with a time period of 100ms. What is the amplitude of the waveform?
a)
5V
b)
-5V
c)
10V
d)
0V
42.
A sine wave goes from 5V to -1V with a time period of 100ms. What is the amplitude of the waveform?
a)
5V
b)
-5V
c)
10V
d)
0V
43.
A 5V pulse wave has a time period of 100ms. The wave is at 5V for 25ms in a time period. What is the ontime of the wave form?
a)
125ms
b)
75ms
c)
100ms
d)
25ms
44.
A 5V pulse wave has a time period of 100ms. The wave is at 5V for 25ms in a time period. What is the offtime of the wave form?
a)
125ms
b)
75ms
c)
100ms
d)
25ms
45.
A square wave is of 10V amplitude. What is the part of the wave form when the voltage rises from 0V to 10V is called?
a)
Falling Edge
b)
Rising Edge
c)
Off Time
d)
On Time
46.
A square wave is of 10V amplitude. What is the part of the wave form when the voltage drops from 10V to 0V is called?
a)
Falling Edge
b)
Rising Edge
c)
Off Time
d)
On Time
47.
What is relation between rise and fall time in a triangular wave form?
a)
Rise time < fall time
b)
Rise time ≥ fall time
c)
Rise time = fall time
d)
None of the mentioned
48.
Which of following application of transistor is related to the field of Digital Electronics?
a)
pwm
b)
Multi-stage Amplifier
c)
Oscillator
d)
Modulator
49.
In which of the following two regions BJT will operate, when it is used as SWITCH?
a)
Saturation & Cut-off Regions
b)
Saturation & Active Regions
c)
Active & Cut-off Regions
d)
Active & Avalanche Breakdown Regions
50.
Transistor behaves like a closed switch between which of the following?
a)
emitter and base
b)
emitter and base
c)
emitter and collector
d)
base and ground
51.
When BJT is in ON mode, it operates as ________ switch.
a)
closed
b)
open
c)
DPST
d)
DPDT
52.
When BJT is in OFF mode, it operates as ________ switch.
a)
closed
b)
open
c)
DPST
d)
DPDT
53.
In what region does a BJT operate when it is fully-OFF?
a)
Active
b)
Saturation
c)
Cut-off
d)
Avalanche Breakdown
54.
In what region does a BJT operate when it is fully-ON?
a)
Active
b)
Saturation
c)
Cut-off
d)
Avalanche Breakdown
55.
Which of the following helps in reducing the switching time of a transistor?
a)
a resistor connected from base to ground
b)
a resistor connected from emitter to ground
c)
a capacitor connected from base to ground
d)
a capacitor connected from emitter to ground
56.
What is the base emitter voltage in a cut off region?
a)
cannot be predicted
b)
greater than 0.7V
c)
equal to 0.7V
d)
less than 0.7V
57.
What is the collector to emitter voltage when the transistor is in saturation?
a)
Is nearly zero
b)
Depends on reverse saturation current
c)
Is between zero and supply voltage
d)
Is nearly supply voltage
58.
Transistor works as an open switch when emitter junction is ______ biased and collector junction is ______biased
a)
Forward, reverse
b)
Reverse, forward
c)
Forward, forward
d)
Reverse, reverse
59.
What are the advantages of the digital systems?
a)
High-efficiency
b)
Uses less bandwidth
c)
Encryption
d)
All of the above
60.
Reliability is the measure of he circuits giving the same output every time for the same set of inputs. Which circuit is called as regenerative repeaters?
a)
Analog circuits
b)
Digital circuits
c)
Amplifiers
d)
A/D converters
61.
What are the advantages of digital circuits?
a)
Less noise
b)
Less interference
c)
More flexible
d)
All of the mentioned
62.
Which type of instruments are more sensitive?
a)
Analog
b)
digital
c)
both are equally sensitive
d)
both are not sensitive
63.
Which of the following integration level is used in DSP ICs & Complex PLDs?
a)
SSI
b)
MSI
c)
LSI
d)
VLSI
64.
Which of the following integration level is used in 8 Mb Memory IC & Image Processor?
a)
LSI
b)
VLSI
c)
ULSI
d)
GSI
65.
Which of the following integration level is used in 64 Mb Memory IC, Multiprocessor & Advanced Processors?
a)
LSI
b)
VLSI
c)
ULSI
d)
GSI
66.
In a number representation, which of the following term indicates the symbols used to represent a number?
a)
Position of a Digit
b)
Index of a Number
c)
Base of a Number
d)
Digit of a Number
67.
In decimal number system what is the value of 7 in the number 3724
a)
7
b)
700
c)
70
d)
7000
68.
In a number representation, which of the following term indicates the total no. numerals available in a number system.
a)
Digit of a Number
b)
Position of a Digit
c)
Base of a Number
d)
Index of a Number
69.
In a number representation, which of the following term indicates how many times to use the number in a multiplication?
a)
Digit of a Number
b)
Position of a Digit
c)
Base of a Number
d)
Index of a Number
70.
Which of the following number system consists of 0 to 9 numerals only?
a)
Binary Number System
b)
Decimal Number System
c)
Hexadecimal Number System
d)
Octal Number System
71.
How many no. of numerals are used in Decimal Number System?
a)
2
b)
8
c)
10
d)
16
72.
In decimal number system what is the value of 6 in the number 4391.386
a)
0.386
b)
0.06
c)
0.006
d)
6
73.
How many no. of numerals are used in Binary Number System?
a)
2
b)
8
c)
10
d)
16
74.
Which of the following number system consists of ONLY 0s & 1s?
a)
Binary Number System
b)
Decimal Number System
c)
Hexadecimal Number System
d)
Octal Number System
75.
Which of the following term indicates the “smallest unit” of binary information?
a)
Bit
b)
Byte
c)
Nibble
d)
Word
76.
Which of the following term indicates the “group of 4 bits” in a binary information?
a)
Bit
b)
Byte
c)
Nibble
d)
Word
77.
Which of the following term indicates the “group of 8 bits” in a binary information?
a)
Bit
b)
Byte
c)
Nibble
d)
Word
78.
Which of the following term indicates the “group of 16 bits” in a binary information?
a)
Byte
b)
Double Word
c)
Nibble
d)
Word
79.
Which of the following term indicates the “group of 32 bits” in a binary information?
a)
Byte
b)
Double Word
c)
Nibble
d)
Word
80.
How many bitss are there in the given byte of data (1011 0101)2?
a)
2
b)
8
c)
1
d)
4
81.
How many no. of nibbles & no. of bytes are there in the given word of data (1110 0110 1011 0101)2?
a)
two nibbles two bytes
b)
two nibbles four bytes
c)
four nibbles two bytes
d)
four nibbles four bytes
82.
How many no. of nibbles, no. of bytes & no. of words are there in the given word of data (1110 0110 1011 0101 0001 0011 1000 0101)2?
a)
two nibbles two bytes two words
b)
two nibbles four bytes eight words
c)
eight nibbles four bytes two words
d)
eight nibbles four bytes four words
83.
What is the place value of 1 in the binary number (01000)2
a)
8
b)
1000
c)
4
d)
1
84.
What is the place value of 1 in the binary number (10000)2
a)
16
b)
1000
c)
8
d)
1
85.
Which of the following term indicates base 8 number system?
a)
Bi
b)
Deca
c)
Hexa
d)
Octa
86.
Which of the following number system consists of 0 to 7 numerals only?
a)
Binary Number System
b)
Decimal Number System
c)
Decimal Number System
d)
Octal Number System
87.
How many no. of numerals are used in Octal Number System?
a)
2
b)
8
c)
10
d)
16
88.
How many bits does each digit represent in hexadecimal system?
a)
4
b)
1
c)
3
d)
8
89.
How many bits are there in the octal data (706)8 and (6365)8
a)
9, 12
b)
3, 4
c)
13, 20
d)
8, 16
90.
What are the position values of the digits 7, 1 and 6, in octal data (716)8
a)
7x100, 1x10, 6x1
b)
7x10, 1x10, 6x1
c)
7x8x8, 1x8, 6x1
d)
7x2x2, 1x2, 6x1
91.
How many total no. of symbols are used in Hexadecimal Number System
a)
2
b)
8
c)
10
d)
16
92.
What do the alphabets A, B, C, D, E and F represent in hexadecimal system?
a)
Capital letters
b)
1, 2, 3, 4, 5
c)
English alphabets
d)
10, 11, 12, 13, 14, 15
93.
How many bits does each digit represent in hexadecimal system?
a)
4
b)
1
c)
3
d)
8
94.
1mb (mega bits) of data requires 20 bits. How many bits are there in 4mb of data?
a)
20
b)
24
c)
8
d)
80
95.
1tb (tera bits) of data requires 30 bits. How many bits are there in 4tb of data?
a)
30
b)
36
c)
12
d)
120
96.
Which of the following term is NOT associated with addition operation?
a)
Augend
b)
Addend
c)
Borrow
d)
Carry
97.
Which of the following term is NOT associated with subtraction operation?
a)
Borrow
b)
Minuend
c)
Subtrahend
d)
Sum
98.
The binary addition of 1 + 1 + 1 + 1 = ________.
a)
(0001)2
b)
(0100)2
c)
(1001)2
d)
(1111)2
99.
The binary addition of 1 + 1 + 1 = _________.
a)
Sum = 1 & Carry = 1
b)
Sum = 1 & Carry = 0
c)
Sum = 0 & Carry = 1
d)
Sum = 0 & Carry = 0
100.
The binary subtraction 0 - 1 = __________.
a)
Difference = 0 & Borrow = 1
b)
Difference = 0 & Borrow = 0
c)
Difference = 1 & Borrow = 1
d)
Difference = 1 & Borrow = 0
101.
Perform addition on two binary numbers: (01000111)2 + (00111011)2
a)
(10001010)2
b)
(10011100)2
c)
(10000010)2
d)
(11000010)2
102.
9s complement is obtained by subtracting each digit from 9. What is 9s complement of a (8)10 ?
a)
(0)10
b)
(2)10
c)
(1)10
d)
(3)10
103.
What is 9s complement of a (683)10 ?
a)
(317)10
b)
(425)10
c)
(232)10
d)
(316)10
104.
10s complement is obtained by adding 1 to 9s complement. What is 10s complement of (778)10 ?
a)
(322)10
b)
(323)10
c)
(222)10
d)
(232)10
105.
Which of the following can be used to get 1’s complement easily?
a)
Comparator
b)
Inverter
c)
Adder
d)
Subtractor
106.
The two complement in binary system is useful for expressing
a)
Positive Numbers
b)
Negative Numbers
c)
Both Positive & Negative Numbers
d)
None of the above
107.
Represent negative number -9 in binary system using 8 bits and signed magnitude.
a)
1001
b)
1001110
c)
11110111
d)
10001001
108.
Represent negative number -9 in binary system using 8 bits in 2s complement.
a)
1001
b)
1001110
c)
11110111
d)
11110111
109.
Binary coded decimal is a combination of __________ bits.
a)
two
b)
three
c)
four
d)
five
110.
In BCD (Binary coded decimal) each digit of decimal number is represented in binary using 4 bits. What is the BCD of (908)10?
a)
1001 0000 1000
b)
1110001100
c)
1001 0 1000
d)
1001 00 1001
111.
A number is written as (1001 0010 1000) in BCD. What is its decimal equivalent?
a)
923
b)
928
c)
2344
d)
-296
112.
Which of the following binary code is a Weighted Binary Code?
a)
ASCII Code
b)
BCD Code
c)
EBCDIC Code
d)
GRAY Code
113.
What is alternate name for 8421 Binary Code?
a)
ASCII Code
b)
BCD Code
c)
EBCDIC Code
d)
GRAY Code
114.
Which of the following is an invalid BCD code?
a)
(0110)2
b)
(0011)2
c)
(1001)2
d)
(1101)2
115.
Write 17 and 25 in BCD and then add.
a)
10001 11001 101010
b)
0011 0110 0010 0101 0011 1101
c)
0001 0111 0010 0101 0011 1100
d)
0011 0111 0011 0101 0010 1100
116.
Identify the type of a binary code in which EACH successive code differs from its preceding (previous) code by a SINGLE BIT ONLY.
a)
BCD Code
b)
GRAY Code
c)
EBCDIC Code
d)
ASCII Code
117.
Which of the following binary code/s is/are Non-Weighted Binary Code/s?
a)
BCD Code
b)
GRAY Code
c)
EBCDIC Code
d)
Both b & c
118.
Write 4 and 6 in gray code.
a)
0110, 0101
b)
0100, 0110
c)
110, 111
d)
4, 6
119.
Which code is used to reduce the error due to ambiguity in reading of a binary optical encoder?
a)
octal code
b)
excess-3 code
c)
gray code
d)
BCD code
120.
Why is the Gray code more practical to use when coding the position of a rotating shaft?
a)
All digits change between counts
b)
Two digits change between counts
c)
Only one digit changes between counts
d)
Alternate digit changes between counts
121.
Which gray code number comes after the gray code 0111?
a)
1001
b)
101
c)
110
d)
1000
122.
How many individual bits are used by an ASCII code to represent any given character?
a)
3
b)
4
c)
7
d)
8
123.
Write in decimal system the ASCII codes for 0 or NULL, '0', '9'.
a)
0, 48, 57
b)
0, 0, 9
c)
0, 10, 90
d)
0, 100, 90
124.
Write in decimal system the ASCII codes for 'A', 'Z', 'a', 'z' .
a)
1, 26, 1, 26
b)
65, 90, 97, 122
c)
1, 26, 27, 52
d)
50, 75, 76, 101
125.
How many individual bits are used by an EBCDIC code to represent any given character?
a)
3
b)
4
c)
7
d)
8
126.
Which of the following circuit is used to generate Parity Bit?
a)
Error Detector Circuit
b)
Parity Generator Circuit
c)
Error Correction Circuit
d)
Parity Checker Circuit
127.
Which of the following circuit is used to check Parity Bit generated is correct or not?
a)
Error Detector Circuit
b)
Parity Generator Circuit
c)
Error Correction Circuit
d)
Parity Checker Circuit
128.
Place a even parity bit (MSB) to the binary data: 0100110
a)
100110
b)
100110
c)
10100110
d)
1001101
129.
Place a odd parity bit (MSB) to the binary data: 0100110
a)
10100110
b)
100110
c)
100110
d)
1001100
130.
What is the purpose of Parity check bit coding?
a)
Error correction
b)
Error detection
c)
Error correction and detection
d)
None of the above
131.
We can not use parity bit coding for which of the following?
a)
Error in more than single bit
b)
Which bit is in error
c)
Both a) and b)
d)
None of the above
132.
Convert the Gray code 1011 to binary.
a)
1011
b)
1010
c)
100
d)
1101
133.
Which of the following statements is false about logic gates?
a)
It can have two outputs
b)
It has only one output
c)
It can have 2 or more inputs
d)
It can have one input also
134.
Which of the following parameter will give the possible input-output combinations of a logic gate?
a)
Boolean Expression
b)
Logic Symbol
c)
Logic Symbol
d)
Truth Table
135.
Which of the following parameter is used to represent equation or expression of logic gate?
a)
Boolean Expression
b)
Truth Table
c)
Timing Diagram
d)
Logic Symbol
136.
There are 3 types of logic gates. What are they?
a)
Basic, local and Arithmetic
b)
Basic, Universal and Exclusive
c)
Basic, Advanced and Arithmetic
d)
Basic, Universal and logical
137.
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
138.
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
139.
Which of the following logic gate is an Universal gate?
a)
AND Gate
b)
OR Gate
c)
NAND Gate
d)
EX-OR Gate
140.
If the input is HIGH then output is LOW. If input is LOW then output is HIGH. This is called complemenation of input. Which of the following logic gate performs complementation?
a)
AND Gate
b)
OR Gate
c)
NOT Gate
d)
NAND Gate
141.
Which logic gate takes only one input?
a)
AND Gate
b)
OR Gate
c)
NOT Gate
d)
NAND Gate
142.
Adding two bits is called logic addition. Which of the following logic gate performs logical addition?
a)
AND Gate
b)
OR Gate
c)
NOT Gate
d)
NAND Gate
143.
Multiplying two bits is called logic multiplication. Which of the following logic gate performs logical multiplication?
a)
AND Gate
b)
OR Gate
c)
NOT Gate
d)
NAND Gate
144.
Two normally open switches are connected as inputs to a lamp. Any switch can be used to switch the light ON. Which gate is suitable to implement this logic?
a)
AND Gate
b)
OR Gate
c)
NOT Gate
d)
NAND Gate
145.
Two normally open switches are connected to control a bulb. Both switches must be in ON position to light the bulb. Which gate is suitable to implement this logic?
a)
AND Gate
b)
OR Gate
c)
NOT Gate
d)
NAND Gate
146.
5V and 0V are connected as two inputs to a OR gate. Output is connected to a NOT gate. What is the ouput of this combination?
a)
will not work
b)
oscillates between HIGH and LOW
c)
HIGH
d)
LOW
147.
5V and 0V are connected as two inputs to a AND gate. Output is connected to a NOT gate. What is the ouput of this combination?
a)
will not work
b)
oscillates between HIGH and LOW
c)
HIGH
d)
LOW
148.
Which of the following is a OR gate IC and how many OR gates does it have?
a)
IC7400, 4
b)
IC7416, 6
c)
7401, 4
d)
7402
149.
Which of the following is a AND gate IC and how many AND gates does it have?
a)
IC7408, 4
b)
IC7432, 4
c)
7406, 6
d)
7402
150.
Which of the following is a NOT gate IC and how many NOT gates does it have?
a)
IC7400, 4
b)
IC7416, 6
c)
7406, 6
d)
Both B and C
151.
Which of the following logic gate performs Complement of OR Operation?
a)
AND Gate
b)
NOR Gate
c)
NOT Gate
d)
NAND Gate
152.
Which of the following logic gate performs Complement of AND Operation?
a)
AND Gate
b)
NOR Gate
c)
NOT Gate
d)
NAND Gate
153.
A circuit takes inputs from two HIGH / LOW logic sensors. A warning light must be ON only when inputs from any of the two sensors is LOW. Which gate can be used to implement this logic?
a)
AND Gate
b)
OR Gate
c)
NOT Gate
d)
NAND Gate
154.
A circuit takes inputs from two HIGH / LOW logic sensors. A warning light must be ON only when inputs from both the sensors are LOW. Which gate can be used to implement this logic?
a)
NOR Gate
b)
OR Gate
c)
NOT Gate
d)
NAND Gate
155.
A NAND can also be implemented by using which two gates in the correct sequence?
a)
OR, NOT
b)
AND, NOT
c)
not.and
d)
NOT, NAND
156.
A NOR can also be implemented by using which two gates in the correct sequence?
a)
OR, NOT
b)
NOT, AND
c)
AND, NOT
d)
NOT, NAND
157.
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)
NAND Gate
d)
NOR Gate
158.
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
159.
Identify the logic gate which is suitable for bit comparison.
a)
Two input OR Gate
b)
Two input EX-OR Gate
c)
Two input EX-NOR Gate
d)
Both b & c
160.
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
161.
A circuit takes inputs from two HIGH / LOW logic sensors. A warning light must be ON only when one sensor is at LOW and the other at HIGH. Which gate can be used to implement this logic?
a)
OR Gate
b)
EX-OR Gate
c)
NOR Gate
d)
EX-NOR Gate
162.
A circuit takes inputs from two HIGH / LOW logic sensors. A warning light must be ON only when both the sensor outputs are the same. Which gate can be used to implement this logic?
a)
OR Gate
b)
EX-OR Gate
c)
NOR Gate
d)
EX-NOR Gate
163.
A variable is a symbol in Boolean algebra used to represent
a)
Data
b)
A Condition
c)
An Action
d)
All of the Above
164.
Identify the term of Boolean Algebra which will give the inverse of variable.
a)
Complement
b)
Literal
c)
Variable
d)
None of the above
165.
Where can the Boolean algebra be used?
a)
For designing of the digital computers
b)
In building logic symbols
c)
Circuit theory
d)
Building algebraic functions
166.
What does the Boolean expression A + B + C represent?
a)
complement
b)
literal term
c)
product term
d)
sum term
167.
What does the Boolean expression A . B . C represent?
a)
complement
b)
literal term
c)
product term
d)
sum term
168.
Determine the values of A, B, and C that make the sum term A' + B' + C = 0.
a)
A = 0 ; B = 0 ; C = 0
b)
A = 1 ; B = 1 ; C = 0
c)
A = 1 ; B = 0 ; C = 1
d)
A = 1 ; B = 1 ; C = 1
169.
Determine the values of A, B, and C that make the product term AB'C equal to 1.
a)
A = 0 ; B = 0 ; C = 0
b)
A = 1 ; B = 1 ; C = 0
c)
A = 1 ; B = 0 ; C = 1
d)
A = 1 ; B = 1 ; C = 1
170.
Find the value of A(B + C) and A(B + C)' if A = 0, B and C are not known (don’t care)
a)
1, 0
b)
0, 0
c)
B & C not known : can not solve
d)
1, 1
171.
Find the value of A(B + C) and A(B + C)' if A = 1, B = 1 and C is not known (don’t care)
a)
1,o
b)
0, 0
c)
C not known : can not solve
d)
1, 1
172.
Identify the boolean expression for associative law of addition from the following.
a)
A + B = B + A
b)
A = A + A
c)
(A + B) + C = A + (B + C )
d)
A + 0 = A
173.
Identify the boolean expression for commutative law of multiplication from the following.
a)
A . B = B . A
b)
A = A . A
c)
(A . B) . C = A . (B . C )
d)
A . 0 = 0
174.
Identify the boolean expression for distributive law.
a)
A(B + C) = AB + AC
b)
A(BC) = ABC
c)
A(A + 1) = A
d)
A + AB = A
175.
Which one of the following is not a valid rule of Boolean algebra?
a)
A + 1 = 1
b)
A = A'
c)
AA = A
d)
A + 0 = A
176.
Which of the following rules states that if one input of an AND gate is always 1, the output is equal to the other input?
a)
A + 1 = 1
b)
A + A = A
c)
A . A = A
d)
A . 1 = A
177.
Simplify the boolean expression X = B + A B' + AB.
a)
AB
b)
(A + B)'
c)
A + B
d)
A'B
178.
Simplify the boolean expression S = (A + B)(A' + C).
a)
S = AB + A'C
b)
S = AB + A'B'
c)
S = AA' + A'B
d)
S = AC + A'B
179.
Simplify the boolean expression S = (X + Y)(X + Y')(X' + Y)
a)
S = X'Y'
b)
S = X'Y
c)
S = XY'
d)
S = XY
180.
Which of the following is equivalent to (XYZ)'
a)
X' Y' Z'
b)
X' + Y' + Z'
c)
(X + Y + Z)'
d)
X'(YZ)'
181.
Which of the following is equivalent to (X + Y + Z)'
a)
X' Y' Z'
b)
(X Y Z)
c)
(X Y Z)'
d)
X'(Y'+Z')
182.
Which of the following is equivalent to (X' + Y' + Z')'
a)
X' Y' Z'
b)
(X Y Z)
c)
(X Y Z)'
d)
X'(Y'+Z')
183.
What type of operation is the expression Y=AB+BC+AC?
a)
EX-OR
b)
SOP
c)
POS
d)
NOR
184.
How is SOP implemented?
a)
Input of AND gate taken from multiple ORs
b)
Input of AND gates taken from one OR
c)
Output of one AND gate given to multiple OR
d)
Output of AND gates given to one OR
185.
What type of operation is the expression Y=(A+B)(B+C)(A+C)?
a)
EX-OR
b)
SOP
c)
POS
d)
NOR
186.
How is POS implemented?
a)
Input of OR gate taken from multiple ANDs
b)
Input of OR gates taken from one AND
c)
Output of one OR gate given to multiple AND
d)
Output of OR gates given to one AND
187.
A 2-variable Karnaugh map has
a)
4 cells
b)
8 cells
c)
16 cells
d)
32 cells
188.
A 2-variable Karnaugh map has
a)
4 singles, 4 pairs, 1 quad, 0 Octets
b)
2 singles, 2 pairs, 1 quad, 0 Octets
c)
2 singles, 4 pairs, 1 quad, 0 Octets
d)
4 singles, 2 pairs, 1 quad, 0 Octets
189.
A 3-variable Karnaugh map has
a)
4 cells
b)
8 cells
c)
16 cells
d)
32 cells
190.
A 3-variable Karnaugh map has
a)
8 singles, 8 pairs, 2 quad, 0 Octets
b)
8 singles, 4 pairs, 2 quad, 0 Octets
c)
8 singles, 8 pairs, 4 quad, 1 Octets
d)
8 singles, 12 pairs, 6 quad, 1 Octets
191.
A 4-variable Karnaugh map has
a)
4 cells
b)
8 cells
c)
16 cells
d)
32 cells
192.
A 4-variable Karnaugh map has
a)
16 singles, 12 pairs, 16 quad, 2 Octets
b)
16 singles, 16 pairs, 18 quad, 4 Octets
c)
16 singles, 32 pairs, 24 quad, 8 Octets
d)
16 singles, 12 pairs, 6 quad, 2 Octets
193.
In a 4-variable SoP Karnaugh map, a 2-variable product term is obtained by
a)
a QUAD of adjacent 1s
b)
an OCTET of adjacent 1s
c)
a PAIR of adjacent 1s
d)
a QUAD of adjacent 0s
194.
In a 4-variable SoP Karnaugh map, a 3-variable product term is obtained by
a)
a QUAD of adjacent 1s
b)
an OCTET of adjacent 1s
c)
a PAIR of adjacent 1s
d)
a QUAD of adjacent 0s
195.
In a 4-variable SoP Karnaugh map, a SINGLE-variable is obtained by
a)
a QUAD of adjacent 1s
b)
an OCTET of adjacent 1s
c)
a PAIR of adjacent 1s
d)
a QUAD of adjacent 0s
196.
In a 4-variable SoP Karnaugh map, a 4-variable product term is obtained by
a)
a QUAD of adjacent 1s
b)
an OCTET of adjacent 1s
c)
a PAIR of adjacent 1s
d)
a SINGLE 1 with NO adjacent 1s
197.
In a 4-variable SoP Karnaugh map, a PAIR is formed by grouping adjacent
a)
two 1s
b)
four 1s
c)
eight 1s
d)
sixteen 1s
198.
In a 4-variable SoP Karnaugh map, a QUAD is formed by grouping adjacent
a)
two 1s
b)
four 1s
c)
eight 1s
d)
sixteen 1s
199.
In a 4-variable SoP Karnaugh map, an OCTET is formed by grouping adjacent
a)
two 1s
b)
four 1s
c)
eight 1s
d)
sixteen 1s
200.
In a 4-variable PoS Karnaugh map, a PAIR is formed by grouping adjacent
a)
two 1s
b)
four 1s
c)
two 0s
d)
four 0s
201.
In a 4-variable PoS Karnaugh map, a QUAD is formed by grouping adjacent
a)
two 1s
b)
four 1s
c)
two 0s
d)
four 0s
202.
In a 4-variable PoS Karnaugh map, an OCTET is formed by grouping adjacent
a)
four 1s
b)
eight 1s
c)
four 0s
d)
eight 0s
203.
Which of the following combinations CANNOT be combined while doing grouping in K-Map?
a)
Corners in the same row
b)
Corners in the same column
c)
Diagonal corners
d)
Overlapping combinations
100 %
