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WorksheetsUNIT -1 INTRODUCTION TO DIGITAL ELECTRONICS
Total questions: 51
Worksheet time: 26mins
Name
Class
Date
1.
Which of the following is can be considered as Continuous Value?
a)
0.5 Volts
b)
15.017252 Volts
c)
100 Volts
d)
48 Volts
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 of the following is an analog device?
a)
IPAD
b)
Smart TV
c)
Dial Telephone
d)
Digital Multimeter
5.
Which of the following is a digital device?
a)
Analog Voltmeter
b)
Cassette Tape
c)
Mechanical Watch
d)
Digital Watch
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 an Voice Signal?
a)
Sinusoidal Waveform
b)
Square Waveform
c)
Staircase Waveform
d)
Trianglular Waveform
8.
Which waveform is used to represent an Digital Signal?
a)
Sinusoidal Waveform
b)
Clock Pulse
c)
Staircase Waveform
d)
Trianglular Waveform
9.
The parallel transmission of digital data:
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.
Serial format means digital signals are:
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 the CORRECT?
a)
Analog System is a Flexible System
b)
Digital System is a Flexible System
c)
Digital System is a Fixed System
d)
Analog System is a Programmable System
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 statement/s is/are the 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 statement is the 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 statement/s is/are the CORRECT in case of DIGITAL System?
a)
Cheaper System
b)
Low Power Consumption
c)
Long Distance Communication
d)
Both b & c
19.
Which of the following ranges is related to HIGH LEVEL range?
a)
VL (min) to VL (max)
b)
VL (min) to VH (max)
c)
VL (max) to VH (min)
d)
VH (min) to VH (max)
20.
Which of the following ranges is related to UNACCEPTABLE VOLTAGE LEVEL range?
a)
VL (min) to VL (max)
b)
VL (max) to VH (min)
c)
VL (min) to VH (max)
d)
VH (min) to VH (max)
21.
Which of the following ranges is related to LOW LEVEL range?
a)
VL (min) to VL (max)
b)
VL (min) to VH (max)
c)
VL (max) to VH (min)
d)
VH (min) to VH (max)
22.
In a positive logic system, ________.
a)
only HIGHs are present
b)
only LOWs are present
c)
a LOW = 1, a HIGH = 0
d)
a HIGH = 1, a LOW = 0
23.
In a negative logic system, ________.
a)
a LOW = 1, a HIGH = 0
b)
a HIGH = 1, a LOW = 0
c)
only HIGHs are present
d)
only LOWs are present
24.
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 90% of the pulse amplitude
c)
10% of the pulse amplitude to the maximum HIGH voltage
d)
10% of the pulse amplitude to 90% of the pulse amplitude
25.
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
26.
A periodic digital waveform has a pulse width (tw) of 6 ms and a period (T) of 18 ms. The duty cycle is ________.
a)
0.033
b)
0.333
c)
0.06
d)
0.18
27.
The frequency of a pulse train is 2 kHz. The pulse period is ________.
a)
5 ms
b)
50 ms
c)
500 μs
d)
2 μs
28.
The magnitude of the signal waveform from 0 Volt level is defined as ____________.
a)
Amplitude
b)
Time Period
c)
Frequency
d)
Duty Cycle
29.
The length of time that the waveform takes to repeat itself from start to finish is defined as __________.
a)
Amplitude
b)
Time Period
c)
Frequency
d)
Duty Cycle
30.
The total no. of occurrences in one cycle of square wave is defined as _____________.
a)
Amplitude
b)
Time Period
c)
Frequency
d)
Duty Cycle
31.
The time the signal is at 5V or logic high level is known as _________.
a)
Duty Cycle
b)
Rise Edge
c)
Off Time
d)
On Time
32.
The time the signal is at 0V or logic low level is known as _________.
a)
Duty Cycle
b)
Rise Edge
c)
Off Time
d)
On Time
33.
A (0) to (1) transition of the signal is termed as _______.
a)
Fall Edge
b)
Rise Edge
c)
Off Time
d)
On Time
34.
A (1) to (0) transition of the signal is termed as _______.
a)
Fall Edge
b)
Rise Edge
c)
Off Time
d)
On Time
35.
The ratio of ON time to the total time period of signal is known as ______________.
a)
Duty Cycle
b)
Fall Edge
c)
Rise Edge
d)
On Time
36.
The waveform that repeats itself at a fixed intervals, with a pertiod (T) is ___________.
a)
Positive Edge Pulse
b)
Negative Edge Pulse
c)
Periodic Pulse
d)
Non-Periodic Pulse
37.
The waveform that DOES NOT repeats itself at a fixed intervals is ___________.
a)
Positive Edge Pulse
b)
Negative Edge Pulse
c)
Periodic Pulse
d)
Non-Periodic Pulse
38.
Which of following application of transistor is related to the field of Digital Electronics?
a)
Multi-stage Amplifier
b)
Switch
c)
Oscillator
d)
Modulator
39.
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
40.
When BJT is in ON mode, it operates as ________ switch.
a)
closed
b)
open
c)
DPST
d)
DPDT
41.
When BJT is in OFF mode, it operates as ________ switch.
a)
closed
b)
open
c)
DPST
d)
DPDT
42.
When BJT is fully-OFF, it operates in _________ region.
a)
Active
b)
Saturation
c)
Cut-off
d)
Avalanche Breakdown
43.
When BJT is fully-ON, it operates in _________ region.
a)
Active
b)
Saturation
c)
Cut-off
d)
Avalanche Breakdown
44.
Which of the following component is used in first generation computers?
a)
Vacuum Tube
b)
Transistor
c)
Integrated Chip
d)
Very Large Scale Integration Chip
45.
Which of the following component is used in second generation computers?
a)
Vacuum Tube
b)
Transistor
c)
Integrated Chip
d)
Very Large Scale Integration Chip
46.
Which of the following integration level is used in Logic Gates & Op-Amp ICs?
a)
SSI
b)
MSI
c)
LSI
d)
VLSI
47.
Which of the following integration level is used in Adder, Multiplexer, Counter & Shift Register ICs?
a)
SSI
b)
MSI
c)
LSI
d)
VLSI
48.
Which of the following integration level is used in DAC/ADC & 8-Bit Microprocessor ICs?
a)
SSI
b)
MSI
c)
LSI
d)
VLSI
49.
Which of the following integration level is used in DSP ICs & Complex PLDs?
a)
SSI
b)
MSI
c)
LSI
d)
VLSI
50.
Which of the following integration level is used in 8 Mb Memory IC & Image Processor?
a)
LSI
b)
VLSI
c)
ULSI
d)
GSI
51.
Which of the following integration level is used in 64 Mb Memory IC, Multiprocessor & Advanced Processors?
a)
LSI
b)
VLSI
c)
ULSI
d)
GSI
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