ELECTRONICS ENGINEERING- PAGE 1
ELECTRONICS ENGINEERING- PAGE 1 MCQs
1:-What is the DFT of the four point sequence x(n) = {0, 1, 2, 3} ?
A:-{6, -2 + 2j-2, -2-2j}
B:-{6, -2-2j, 2, -2+2j}
C:-{6, -2+2j, -2, -2-2j}
D:-{6, -2-2j, -2,-2+2j}
Ans: C
2:-Which kind of polarization is provided by helical antennas ?
A:-Circular
B:-Elliptical
C:-Plane circular
D:-All of the above
Ans: A
3:-Which has same probability of error ?
A:-BPSK and QPSK
B:-BPSK and ASK
C:-BPSK and PAM
D:-BPSK and QAM
Ans: C
4:-In MSK, the difference between the higher and lower frequency is
A:-Same as the bit rate
B:-Four time the bit rate
C:-Twice of the bit rate
D:-Half of the bit rate
Ans: D
5:-The data rate of QPSK is _____________ of BPSK.
A:-Thrice
B:-Twice
C:-Four times
D:-Same
Ans: B
6:-TDMA allows the user to have
A:-Use of same frequency channel for same time slot
B:-Use of same frequency channel for different time slot
C:-Use of same time slot for different frequency channel
D:-Use of different time slot for different frequency channels
Ans: B
7:-Unauthorised access of information from a wireless device through a bluetooth connection is called``
A:-Bluesnarfing
B:-Bluemaking
C:-Bluestring
D:-None of the above
Ans: A
8:-In a TWT the amplitude of resultant wave travelling down the helix
A:-Increases exponentially
B:-Increases linearly
C:-Decreases exponentially
D:-Is almost constant
Ans: A
9:-If the gate current of an SCR is increased, the forward breakdown voltage will
A:-Increase
B:-Decrease
C:-Not be affected
D:-Become infinite
Ans: C
10:-What is the range of the operating voltage level for LEDs ?
A:-5-12 mV
B:-1.7-3.3 V
C:-5-12 V
D:-20-25 V
Ans: B
11:-To turn on UJT, the forward bias on the emitter diode should be ______________ the peak point voltage.
A:-Less than
B:-Equal to
C:-More than
D:-None of the above
Ans: C
12:-The device that does not have the gate terminal is
A:-Triac
B:-FET
C:-SCR
D:-Diac
Ans: D
13:-If the negative potential on the control grid of CRT is increased, the intensity of spot
A:-is increased
B:-is decreased
C:-remains the same
D:-none of the above
Ans: B
14:-The sensitivity of a multimeter is given in
A:-Ω
B:-amperes
C:-kΩ/V
D:-none of the above
Ans: C
15:-The controlling parameter in IGBT is the
A:-`I_(G)`
B:-`V_(GE)`
C:-`I_(C)`
D:-`V_(CE)`
Ans: B
16:-In a loss less inverter, the average power absorbed in one period by the load must be
A:-Equal to the average power supplied by the dc source
B:-Greater than the average power supplied by the dc source
C:-Lesser than the average power supplied by the dc source
D:-Equal to the average power supplied by the ac source
Ans: A
17:-A module in a solar panel refers to
A:-Series arrangement of solar cells
B:-Parallel arrangement of solar cells
C:-Series and parallel arrangement of solar cells
D:-None of the above
Ans: C
18:-A laser diode normally emits
A:-Coherent and monochromatic light
B:-Coherent light
C:-Monochromatic light
D:-Neither coherent nor monochromatic light
Ans: A
19:-The quality of output AC voltage of cycloconverter is improved with
A:-Increase in output voltage at reduced frequency
B:-Increase in output voltage at increased frequency
C:-Decrease in output voltage at reduced frequency
D:-Decrease in output voltage at increased frequency
Ans: B
20:-With the increase in the intensity of light, the resistance of a photovoltaic cell
A:-Decreases
B:-Increases
C:-Remains same
D:-None of these
Ans: A
A:-{6, -2 + 2j-2, -2-2j}
B:-{6, -2-2j, 2, -2+2j}
C:-{6, -2+2j, -2, -2-2j}
D:-{6, -2-2j, -2,-2+2j}
Ans: C
2:-Which kind of polarization is provided by helical antennas ?
A:-Circular
B:-Elliptical
C:-Plane circular
D:-All of the above
Ans: A
3:-Which has same probability of error ?
A:-BPSK and QPSK
B:-BPSK and ASK
C:-BPSK and PAM
D:-BPSK and QAM
Ans: C
4:-In MSK, the difference between the higher and lower frequency is
A:-Same as the bit rate
B:-Four time the bit rate
C:-Twice of the bit rate
D:-Half of the bit rate
Ans: D
5:-The data rate of QPSK is _____________ of BPSK.
A:-Thrice
B:-Twice
C:-Four times
D:-Same
Ans: B
6:-TDMA allows the user to have
A:-Use of same frequency channel for same time slot
B:-Use of same frequency channel for different time slot
C:-Use of same time slot for different frequency channel
D:-Use of different time slot for different frequency channels
Ans: B
7:-Unauthorised access of information from a wireless device through a bluetooth connection is called``
A:-Bluesnarfing
B:-Bluemaking
C:-Bluestring
D:-None of the above
Ans: A
8:-In a TWT the amplitude of resultant wave travelling down the helix
A:-Increases exponentially
B:-Increases linearly
C:-Decreases exponentially
D:-Is almost constant
Ans: A
9:-If the gate current of an SCR is increased, the forward breakdown voltage will
A:-Increase
B:-Decrease
C:-Not be affected
D:-Become infinite
Ans: C
10:-What is the range of the operating voltage level for LEDs ?
A:-5-12 mV
B:-1.7-3.3 V
C:-5-12 V
D:-20-25 V
Ans: B
11:-To turn on UJT, the forward bias on the emitter diode should be ______________ the peak point voltage.
A:-Less than
B:-Equal to
C:-More than
D:-None of the above
Ans: C
12:-The device that does not have the gate terminal is
A:-Triac
B:-FET
C:-SCR
D:-Diac
Ans: D
13:-If the negative potential on the control grid of CRT is increased, the intensity of spot
A:-is increased
B:-is decreased
C:-remains the same
D:-none of the above
Ans: B
14:-The sensitivity of a multimeter is given in
A:-Ω
B:-amperes
C:-kΩ/V
D:-none of the above
Ans: C
15:-The controlling parameter in IGBT is the
A:-`I_(G)`
B:-`V_(GE)`
C:-`I_(C)`
D:-`V_(CE)`
Ans: B
16:-In a loss less inverter, the average power absorbed in one period by the load must be
A:-Equal to the average power supplied by the dc source
B:-Greater than the average power supplied by the dc source
C:-Lesser than the average power supplied by the dc source
D:-Equal to the average power supplied by the ac source
Ans: A
17:-A module in a solar panel refers to
A:-Series arrangement of solar cells
B:-Parallel arrangement of solar cells
C:-Series and parallel arrangement of solar cells
D:-None of the above
Ans: C
18:-A laser diode normally emits
A:-Coherent and monochromatic light
B:-Coherent light
C:-Monochromatic light
D:-Neither coherent nor monochromatic light
Ans: A
19:-The quality of output AC voltage of cycloconverter is improved with
A:-Increase in output voltage at reduced frequency
B:-Increase in output voltage at increased frequency
C:-Decrease in output voltage at reduced frequency
D:-Decrease in output voltage at increased frequency
Ans: B
20:-With the increase in the intensity of light, the resistance of a photovoltaic cell
A:-Decreases
B:-Increases
C:-Remains same
D:-None of these
Ans: A
21:-_______________ amplifier is commonly used as a frequency multiplier.
A:-Class A
B:-Class B
C:-Class C
D:-All of the above
Ans: C
22:-Removing bypass capacitor across the emitter-leg resistor in a CE amplifier causes
A:-Increase in current gain
B:-Decrease in current gain
C:-Increase in voltage gain
D:-Decrease in voltage gain
Ans: D
23:-If the maximum collector current due to signal alone is 3mA, then zero signal collector current should be at least equal to
A:-6mA
B:-2mA
C:-3mA
D:-1mA
Ans: C
24:-In a multistage amplifier, the overall frequency response is determined by the
A:-Frequency response of each stage depending on the relationships of the critical frequencies
B:-Frequency response of the first amplifier
C:-Frequency response of the last amplifier
D:-Lower critical frequency of the first amplifier and the upper critical frequency of the final amplifier
Ans: A
25:-Halving the power corresponds to a ______________dB _____________
A:-10, decrease
B:-3, decrease
C:-3, increase
D:-10, increase
Ans: B
26:-If negative feedback is introduced in amplifiers with shunt current configuration, the input resistance will
A:-Increase
B:-Remains the same
C:-Increase, decrease or remains the same depending on input
D:-Decrease
Ans: D
27:-Pinch-off voltage`V_(p)` for an FET is the drain voltage at which
A:-Significant drain current starts flowing
B:-Drain current becomes zero
C:-All free charges get removed from the channel
D:-Avalanche break down takes place
Ans: C
28:-Compared to bipolar transistor, a JFET has
A:-Higher input impedance and low voltage gain
B:-Lower input impedance and high voltage gain
C:-Higher input impedance and high voltage gain
D:-Lower input impedance and low voltage gain
Ans: A
29:-Class AB operation is ______________ operation.
A:-similar to class A
B:-similar to class B
C:-similar to class C
D:-none of the above
Ans: D
30:-The ripple factor of a full-wave rectifier circuit compared to that of a half wave rectifier circuit without filter is
A:-Half of that for a half wave rectifier
B:-Less than half that for a half-wave rectifier circuit
C:-Equal to that of a half wave rectifier
D:-None of the above
Ans: B
31:-A capacitor is fully charged when
A:-The voltage across its plates is half of the voltage from ground to one of its plates
B:-The current through the capacitor is the same as when the capacitor is discharged
C:-The voltage across the plates is 0.707 of the input voltage
D:-The current through the capacitor is directly proportional to the area of the plates
Ans: B
32:-The saturation condition of transistor implies that
A:-Collector current has highest possible value
B:-Entire Vcc gets dropped across load resistor
C:-It acts as a closed switch with negligible value of resistance
D:-All of the above
Ans: D
33:-The output of a particular Op-amp increases 8V in 12`mu` s. The slew rate is
A:-90 V/`mu` s
B:-0.67 V/`mu` s
C:-1.5 V/`mu` s
D:-None of these
Ans: B
34:-With zero volts on both inputs, an Op-amp ideally should have an output
A:-Equal to the positive supply voltage
B:-Equal to the negative supply voltage
C:-Equal to zero
D:-Equal to CMRR
Ans: C
35:-Determine the output resistance of differential amplifier with three op-amp. The op-amp used in 741c, with A =200000 and `R_(0)`. The output and difference of input voltages are 44 and 11.
A:-5.5 MΩ
B:-3.5 MΩ
C:-2.4 MΩ
D:-1.5 MΩ
Ans: D
36:-The bandwidth of the differential amplifier increases, if the value of
A:-Open Loop Voltage Gain Decreases
B:-Closed Loop Voltage Gain Decreases
C:-Differential Voltage Gain Decreases
D:-All of the above
Ans: B
37:-If the gain of a non-inverting averaging amplifier is one. Determine the input voltages, if the output voltage is 3v
A:-`V_(1)` =6v, `V_(2)` = 3v and `V_(3)` =2v
B:-`V_(1)` = 9v, `V_(2)` = 5v and `V_(3)` = -4v
C:-`V_(1)` =8v, `V_(2)` = -6v and `V_(3)` = 1v
D:-`V_(1)` = 7v, `V_(2)` = 4v and `V_(3)` = -3v
Ans: D
38:-In differential op-amp configuration a subtractor is called as
A:-Scaling amplifier
B:-All of the mentioned
C:-Summing amplifier
D:-Difference amplifier
Ans: A
39:-An ideal operational amplifier has
A:-Infinite output impedance
B:-Zero input impedance
C:-Infinite bandwidth
D:-All of the above
Ans: C
40:-How the op-amp comparator should be choosen to get higher speed of operation ?
A:-Wider bandwidth
B:-High slew rate
C:-Large gain
D:-None of the above
Ans: A
A:-Class A
B:-Class B
C:-Class C
D:-All of the above
Ans: C
22:-Removing bypass capacitor across the emitter-leg resistor in a CE amplifier causes
A:-Increase in current gain
B:-Decrease in current gain
C:-Increase in voltage gain
D:-Decrease in voltage gain
Ans: D
23:-If the maximum collector current due to signal alone is 3mA, then zero signal collector current should be at least equal to
A:-6mA
B:-2mA
C:-3mA
D:-1mA
Ans: C
24:-In a multistage amplifier, the overall frequency response is determined by the
A:-Frequency response of each stage depending on the relationships of the critical frequencies
B:-Frequency response of the first amplifier
C:-Frequency response of the last amplifier
D:-Lower critical frequency of the first amplifier and the upper critical frequency of the final amplifier
Ans: A
25:-Halving the power corresponds to a ______________dB _____________
A:-10, decrease
B:-3, decrease
C:-3, increase
D:-10, increase
Ans: B
26:-If negative feedback is introduced in amplifiers with shunt current configuration, the input resistance will
A:-Increase
B:-Remains the same
C:-Increase, decrease or remains the same depending on input
D:-Decrease
Ans: D
27:-Pinch-off voltage`V_(p)` for an FET is the drain voltage at which
A:-Significant drain current starts flowing
B:-Drain current becomes zero
C:-All free charges get removed from the channel
D:-Avalanche break down takes place
Ans: C
28:-Compared to bipolar transistor, a JFET has
A:-Higher input impedance and low voltage gain
B:-Lower input impedance and high voltage gain
C:-Higher input impedance and high voltage gain
D:-Lower input impedance and low voltage gain
Ans: A
29:-Class AB operation is ______________ operation.
A:-similar to class A
B:-similar to class B
C:-similar to class C
D:-none of the above
Ans: D
30:-The ripple factor of a full-wave rectifier circuit compared to that of a half wave rectifier circuit without filter is
A:-Half of that for a half wave rectifier
B:-Less than half that for a half-wave rectifier circuit
C:-Equal to that of a half wave rectifier
D:-None of the above
Ans: B
31:-A capacitor is fully charged when
A:-The voltage across its plates is half of the voltage from ground to one of its plates
B:-The current through the capacitor is the same as when the capacitor is discharged
C:-The voltage across the plates is 0.707 of the input voltage
D:-The current through the capacitor is directly proportional to the area of the plates
Ans: B
32:-The saturation condition of transistor implies that
A:-Collector current has highest possible value
B:-Entire Vcc gets dropped across load resistor
C:-It acts as a closed switch with negligible value of resistance
D:-All of the above
Ans: D
33:-The output of a particular Op-amp increases 8V in 12`mu` s. The slew rate is
A:-90 V/`mu` s
B:-0.67 V/`mu` s
C:-1.5 V/`mu` s
D:-None of these
Ans: B
34:-With zero volts on both inputs, an Op-amp ideally should have an output
A:-Equal to the positive supply voltage
B:-Equal to the negative supply voltage
C:-Equal to zero
D:-Equal to CMRR
Ans: C
35:-Determine the output resistance of differential amplifier with three op-amp. The op-amp used in 741c, with A =200000 and `R_(0)`. The output and difference of input voltages are 44 and 11.
A:-5.5 MΩ
B:-3.5 MΩ
C:-2.4 MΩ
D:-1.5 MΩ
Ans: D
36:-The bandwidth of the differential amplifier increases, if the value of
A:-Open Loop Voltage Gain Decreases
B:-Closed Loop Voltage Gain Decreases
C:-Differential Voltage Gain Decreases
D:-All of the above
Ans: B
37:-If the gain of a non-inverting averaging amplifier is one. Determine the input voltages, if the output voltage is 3v
A:-`V_(1)` =6v, `V_(2)` = 3v and `V_(3)` =2v
B:-`V_(1)` = 9v, `V_(2)` = 5v and `V_(3)` = -4v
C:-`V_(1)` =8v, `V_(2)` = -6v and `V_(3)` = 1v
D:-`V_(1)` = 7v, `V_(2)` = 4v and `V_(3)` = -3v
Ans: D
38:-In differential op-amp configuration a subtractor is called as
A:-Scaling amplifier
B:-All of the mentioned
C:-Summing amplifier
D:-Difference amplifier
Ans: A
39:-An ideal operational amplifier has
A:-Infinite output impedance
B:-Zero input impedance
C:-Infinite bandwidth
D:-All of the above
Ans: C
40:-How the op-amp comparator should be choosen to get higher speed of operation ?
A:-Wider bandwidth
B:-High slew rate
C:-Large gain
D:-None of the above
Ans: A
41:-The gain of the first order low pass filter
A:-Increases at the rate 20dB/decade
B:-Increases at the rate 40 dB/decade
C:-Decreases at the rate 20dB/decade
D:-Decreases at the rate 40dB/decade
Ans: C
42:-The poles of the transfer function of normalized low pass butter worth filter exists
A:-On unit circle
B:-Outside unit circle
C:-Inside unit circle
D:-None of the mentioned
Ans: A
43:-A stable multivibrator operating at 150 Hz has a discharge time of 2.5 ms. The duty cycle of the circuit is
A:-50%
B:-75%
C:-95.99%
D:-37.5%
Ans: D
44:-Calculate the output frequency in a frequency multiplier if, fin = 200 Hz is applied to a 7 divide by N-network.
A:-1.2 kHz
B:-1.6 kHz
C:-1.4 kHz
D:-1.9 kHz
Ans: C
45:-Convert binary 111111110010 to hexadecimal
A:-` E E2_(16)`
B:-`FF2_(16)`
C:-`2FE_(16)`
D:-`FD2_(16)`
Ans: B
46:-Which gate is best used as a basic comparator ?
A:-NOR
B:-OR
C:-AND
D:-Exclusive-OR
Ans: D
47:-A decoder can be used as a demultiplexer by
A:-tying all enable pins LOW
B:-tying all data-select lines LOW
C:-tying all data-select lines HIGH
D:-using the input lines for data selection and an enable line for data input
Ans: D
48:-A binary code that progresses such that only one bit changes between two successive codes is
A:-Gray code
B:-8421 code
C:-Excess-3 code
D:-nine's-complement code
Ans: A
49:-A MOD-16 ripple counter is holding the count `1001_(2)`. What will the count be after 31 clock pulses.
A:-`1000_(2)`
B:-`1010_(2)`
C:-`1011_(2)`
D:-`1101_(2)`
Ans: A
50:-Select the statement that best describes Read-Only Memory (ROM).
A:-Non-volatile, used to store information that changes during system operation
B:-Non-volatile, used to store information that does not change during system operation
C:-Volatile, used to store information that changes during system operation
D:-Volatile, used to store information that does not change during system operation
Ans: B
51:-Which of the following logic families has the shortest propagation delay ?
A:-CMOS
B:-BiCMOS
C:-ECL
D:-TTL
Ans: C
52:-A binary input 000 is fed to a 3 bit DAC/ADC. The resultant output is 101. Find the type of error ?
A:-Offset error
B:-Gain error
C:-Settling error
D:-Linearity error
Ans: A
53:-The transmit buffer of serial data buffer is a
A:-Serial-in parallel-out register
B:-Parallel-in serial-out register
C:-Serial-in serial-out register
D:-Parallel-in parallel-out register
Ans: B
54:-The register that provides control and status information about serial port is
A:-IP
B:-IE
C:-PCON and SCON
D:-TSCON
Ans: C
55:-The instruction that performs logical AND operation and the result of the operation is not available is
A:-AAA
B:-AND
C:-XOR
D:-TEST
Ans: D
56:-Which instruction cannot force the 8086 processor out of 'halt' state ?
A:-Hold
B:-Reset
C:-Interrupt request
D:-Both interrupt request and reset
Ans: A
57:-What is the carrier frequency in an AM wave when its highest frequency component is 850 Hz and the bandwidth of the signal is 50 Hz ?
A:-80 Hz
B:-695 Hz
C:-625 Hz
D:-825 Hz
Ans: D
58:-A 100 MHz carrier is frequency modulated by 10 KHz wave. For a frequency deviation of 50 KHz, calculate the modulation index of the FM signal.
A:-100
B:-50
C:-70
D:-90
Ans: B
59: After passing the FM signal through mixer, what is the change in the frequency deviation Δ when the modulating frequency is doubled ?
A:-Becomes 2Δ
B:-Becomes Δ/2
C:-Becomes
D:-Remains unchanged
Ans: D
60:-Pre emphasis is done
A:-For boosting of modulating signal voltage
B:-For modulating signals at higher frequencies
C:-In FM before modulation
D:-All of the above
Ans: D
A:-Increases at the rate 20dB/decade
B:-Increases at the rate 40 dB/decade
C:-Decreases at the rate 20dB/decade
D:-Decreases at the rate 40dB/decade
Ans: C
42:-The poles of the transfer function of normalized low pass butter worth filter exists
A:-On unit circle
B:-Outside unit circle
C:-Inside unit circle
D:-None of the mentioned
Ans: A
43:-A stable multivibrator operating at 150 Hz has a discharge time of 2.5 ms. The duty cycle of the circuit is
A:-50%
B:-75%
C:-95.99%
D:-37.5%
Ans: D
44:-Calculate the output frequency in a frequency multiplier if, fin = 200 Hz is applied to a 7 divide by N-network.
A:-1.2 kHz
B:-1.6 kHz
C:-1.4 kHz
D:-1.9 kHz
Ans: C
45:-Convert binary 111111110010 to hexadecimal
A:-` E E2_(16)`
B:-`FF2_(16)`
C:-`2FE_(16)`
D:-`FD2_(16)`
Ans: B
46:-Which gate is best used as a basic comparator ?
A:-NOR
B:-OR
C:-AND
D:-Exclusive-OR
Ans: D
47:-A decoder can be used as a demultiplexer by
A:-tying all enable pins LOW
B:-tying all data-select lines LOW
C:-tying all data-select lines HIGH
D:-using the input lines for data selection and an enable line for data input
Ans: D
48:-A binary code that progresses such that only one bit changes between two successive codes is
A:-Gray code
B:-8421 code
C:-Excess-3 code
D:-nine's-complement code
Ans: A
49:-A MOD-16 ripple counter is holding the count `1001_(2)`. What will the count be after 31 clock pulses.
A:-`1000_(2)`
B:-`1010_(2)`
C:-`1011_(2)`
D:-`1101_(2)`
Ans: A
50:-Select the statement that best describes Read-Only Memory (ROM).
A:-Non-volatile, used to store information that changes during system operation
B:-Non-volatile, used to store information that does not change during system operation
C:-Volatile, used to store information that changes during system operation
D:-Volatile, used to store information that does not change during system operation
Ans: B
51:-Which of the following logic families has the shortest propagation delay ?
A:-CMOS
B:-BiCMOS
C:-ECL
D:-TTL
Ans: C
52:-A binary input 000 is fed to a 3 bit DAC/ADC. The resultant output is 101. Find the type of error ?
A:-Offset error
B:-Gain error
C:-Settling error
D:-Linearity error
Ans: A
53:-The transmit buffer of serial data buffer is a
A:-Serial-in parallel-out register
B:-Parallel-in serial-out register
C:-Serial-in serial-out register
D:-Parallel-in parallel-out register
Ans: B
54:-The register that provides control and status information about serial port is
A:-IP
B:-IE
C:-PCON and SCON
D:-TSCON
Ans: C
55:-The instruction that performs logical AND operation and the result of the operation is not available is
A:-AAA
B:-AND
C:-XOR
D:-TEST
Ans: D
56:-Which instruction cannot force the 8086 processor out of 'halt' state ?
A:-Hold
B:-Reset
C:-Interrupt request
D:-Both interrupt request and reset
Ans: A
57:-What is the carrier frequency in an AM wave when its highest frequency component is 850 Hz and the bandwidth of the signal is 50 Hz ?
A:-80 Hz
B:-695 Hz
C:-625 Hz
D:-825 Hz
Ans: D
58:-A 100 MHz carrier is frequency modulated by 10 KHz wave. For a frequency deviation of 50 KHz, calculate the modulation index of the FM signal.
A:-100
B:-50
C:-70
D:-90
Ans: B
59: After passing the FM signal through mixer, what is the change in the frequency deviation Δ when the modulating frequency is doubled ?
A:-Becomes 2Δ
B:-Becomes Δ/2
C:-Becomes
D:-Remains unchanged
Ans: D
60:-Pre emphasis is done
A:-For boosting of modulating signal voltage
B:-For modulating signals at higher frequencies
C:-In FM before modulation
D:-All of the above
Ans: D
61. Differential Amplifiers are used in
(A) Buffers (B) Voltage Followers
(C) Voltage Regulators (D) Instrumentation Amplifiers
Ans: D
62. Which of the following is Hardware Interrupts ?
(A) RST5.5, RST6.5, RST7.5 (B) INTR
(C) TRAP (D) All of the above
Ans: D
63. Which Stack is used in 8085 ?
(A) FIFO (B) LIFO
(C) FILO (D) None of the above
Ans: B
64. What is mean by ALU ?
(A) Arithmetic Logic Upgrade (B) Arithmetic Logic Unsigned
(C) Arithmetic Logic Signed (D) Arithmetic Logic Unit
Ans: D
65. The 8051 Microcontroller is of ______ Pin Package and a ______ Processor.
(A) 30, 1 byte (B) 20, 1 Byte
(C) 40, 8 Bit(D) 40, 8 Byte
Ans: C
66. What is the function of Watchdog Timer ?
(A) The Watchdog Timer is an external timer that resets the system if the software fails to operate properly.
(B) The Watchdog Timer is an internal timer that sets the system if the software fails to operate properly.
(C) The Watchdog Timer is an internal timer that resets the system if the software fails to operate properly.
(D) None of the above
Ans: C
67. Which of the following instruction perform as of indirect RAM to Accumulator ?
(A) MOV A, Rn (B) MOV Rn, A
(C) MOV @R1, A (D) MOV A, @R1
Ans: D
68. When the 8051 is reset and the EA line is low, the program counter points to the first program instruction in the :
(A) Internal Code Memory (B) Internal Data Memory
(C) External Code Memory (D) External Data Memory
Ans: C
69. An alternate function of port pin p3.0 (Rxd) in the 8051 is :
(A) Serial Port Input (B) Serial Port Output
(C) Memory Write Strobe (D) Memory Read Strobe
Ans: A
70. Clamper is also known as
(A) Charger (B) Clipper (C) Rectifier (D) DC Restorer
Ans: D
71. Vestigial Type Modulation gives :
(A) High SNR (B) Low Bandwidth (C) Wide Bandwidth (D) FM
Ans: B
72. Receiving Antenna for TV is normally
(A) Loop Antenna (B) Parabolic Reflector (C) Yagi Antenna (D) Folded Dipole
Ans: C
73. Pre-emphasis is used to
(A) Increase RF Power (B) Convert FM into PM (C) Improve SNR (D) Correct AM into AM VSB
Ans: C
74. Sensitivity of Microphone is determined by measuring the ______
(A) Output voltage at a given sound pressure
(B) Output current at a given sound pressure
(C) Output voltage and current at a given sound pressure
(D) None of the above
Ans: A
75. Basic Principles of producing moving pictures is based on :
(A) Continuity (B) Illusion of Continuity (C) Both (A) and (B) (D) None of the above
Ans: B
76. Principle of VIDICON camera tube is based on
(A) Photo Emission Effect (B) Photo Conduction Effect (C) Field Effect (D) Photo Voltaic Effect
Ans: B
77. A PIN Diode is frequently used as a
(A) Peak Clipper
(B) Harmonic Generator
(C) Voltage Regulator
(D) Switching Diode for frequencies up to GHZ range
Ans: D
78. For proper working of a clamper, time constant of the circuit should be
(A) Large (B) Small (C) Equal To Signal Time Period (D) Greater Than 5 Times Signal Time Period
Ans: A
79. A UJT has Rbb=10 KΩ and Rb2 = 4 KΩ. Its intrinsic standoff ratio is
(A) 0.6 (B) 0.4 (C) 2.5 (D) 5/3
Ans: A
80. The main purpose of modulation is to
(A) Combine two waves of different frequencies
(B) Achieve wave shaping of the carrier wave
(C) Transmitting low frequency information over long distance efficiently
(D) Produce side bands
Ans: C
81. In AM, the power content of the carrier is maximum when m equals to
(A) 0 (B) l (C) 0.8 (D) 0.5
Ans: A
82. In the context of IC fabrication, metallisation means
(A) Connecting metallic wires
(B) Forming interconnecting conducting patterns
(C) Covering with a metallic cap
(D) All of the above
Ans: B
83. Commonly used ICs are ___________.
(A) Thin Film (B) Monolithic (C) Hybrid (D) None of the above
Ans: B
84. An Audio Amplifier IC is an example of
(A) Digital IC (B) Linear IC (C) Both (A) and (B) (D) None of the above
Ans: B
85. LM317 Voltage Regulator, what is the minimum value of voltage required between its input and output in order to supply power to an internal circuit ?
(A) 1V (B) 3V (C) 5V (D) 10V
Ans: B
86. What is PSRR Value of an Ideal Op-Amp ?
(A) 0 (B) Unity
(C) Infinite (D) Unpredictable
Ans: A
87. In PLL, the capture range is always _______the lock range.
(A) Greater than (B) Less than
(C) Equal to (D) None of the above
Ans: B
88. What is the nature of Radiation Pattern of an Isotropic Antenna ?
(A) Dough-Nut (B) Elliptical
(C) Hyperbolic (D) Spherical
Ans: D
89. Which among the following is not a disadvantage of Rhombic Antenna ?
(A) Requirement of large space
(B) Reduced transmission efficiency
(C) Wastage of power in terminating resistor
(D) Maximum radiated power along main axis
Ans: D
90. If an Antenna draws 12A current and radiates 4KW, then what will be its Radiation Resistance ?
(A) 22.22 Ω (B) 27.77 Ω(C) 33.33 Ω (D) 39.77 Ω
Ans: B
91. The general arrangement of PLA is
(A) AND/OR structure (B) OR/AND structure
(C) NAND/NOR structure (D) EX-OR/OR structure
Ans: A
92. Serial access memory at the chip level is classed as memory that has
(A) Shift Registers
(B) Counters
(C) Access time is independent of location of data
(D) Internally stored data is used
Ans: A
93. The FPGA refers to
(A) First Programmable Gate Array (B) First Program Gate Array
(C) Field Program Guard Array (D) Field Programmable Gate Array
Ans: D
94. The Full Form of VLSI is
(A) Very Large Scale Integration (B) Very Least Scale Integration
(C) Very Long Single Integration (D) None of the above
Ans: A
95. VHDL is being used for
(A) Documentation
(B) Verification
(C) Synthesis of Large Digital Design
(D) None of the above
Ans: D
96. Which of the following has the capability to store the information permanently ?
(A) RAM (B) ROM
(C) Both RAM and ROM (D) None of the above
Ans: B
97. In a Computer, Registers are present
(A) Within Control Unit (B) Within RAM
(C) Within ROM (D) Within CPU
Ans: D
98. The capacity of a memory unit is
(A) The number of binary input stored (B) The number of words stored
(C) The number of bytes stored (D) None of the above
Ans: C
99. Speed of Data Transmission in 4-G Network of Telecom is
(A) 386 Kbps - 2 Mbps (B) 2 Mbps
(C) 100 Mbps - 1 Gbps (D) 2 Mbps - 1 Gbps
Ans: C
100. The sequence of operations in which Pulse Code Modulation is
(A) Sampling, quantizing, encoding (B) Sampling, encoding quantizing,
(C) Quantizing, sampling, encoding (D) None of the above
Ans: A
(A) Buffers (B) Voltage Followers
(C) Voltage Regulators (D) Instrumentation Amplifiers
Ans: D
62. Which of the following is Hardware Interrupts ?
(A) RST5.5, RST6.5, RST7.5 (B) INTR
(C) TRAP (D) All of the above
Ans: D
63. Which Stack is used in 8085 ?
(A) FIFO (B) LIFO
(C) FILO (D) None of the above
Ans: B
64. What is mean by ALU ?
(A) Arithmetic Logic Upgrade (B) Arithmetic Logic Unsigned
(C) Arithmetic Logic Signed (D) Arithmetic Logic Unit
Ans: D
65. The 8051 Microcontroller is of ______ Pin Package and a ______ Processor.
(A) 30, 1 byte (B) 20, 1 Byte
(C) 40, 8 Bit(D) 40, 8 Byte
Ans: C
66. What is the function of Watchdog Timer ?
(A) The Watchdog Timer is an external timer that resets the system if the software fails to operate properly.
(B) The Watchdog Timer is an internal timer that sets the system if the software fails to operate properly.
(C) The Watchdog Timer is an internal timer that resets the system if the software fails to operate properly.
(D) None of the above
Ans: C
67. Which of the following instruction perform as of indirect RAM to Accumulator ?
(A) MOV A, Rn (B) MOV Rn, A
(C) MOV @R1, A (D) MOV A, @R1
Ans: D
68. When the 8051 is reset and the EA line is low, the program counter points to the first program instruction in the :
(A) Internal Code Memory (B) Internal Data Memory
(C) External Code Memory (D) External Data Memory
Ans: C
69. An alternate function of port pin p3.0 (Rxd) in the 8051 is :
(A) Serial Port Input (B) Serial Port Output
(C) Memory Write Strobe (D) Memory Read Strobe
Ans: A
70. Clamper is also known as
(A) Charger (B) Clipper (C) Rectifier (D) DC Restorer
Ans: D
71. Vestigial Type Modulation gives :
(A) High SNR (B) Low Bandwidth (C) Wide Bandwidth (D) FM
Ans: B
72. Receiving Antenna for TV is normally
(A) Loop Antenna (B) Parabolic Reflector (C) Yagi Antenna (D) Folded Dipole
Ans: C
73. Pre-emphasis is used to
(A) Increase RF Power (B) Convert FM into PM (C) Improve SNR (D) Correct AM into AM VSB
Ans: C
74. Sensitivity of Microphone is determined by measuring the ______
(A) Output voltage at a given sound pressure
(B) Output current at a given sound pressure
(C) Output voltage and current at a given sound pressure
(D) None of the above
Ans: A
75. Basic Principles of producing moving pictures is based on :
(A) Continuity (B) Illusion of Continuity (C) Both (A) and (B) (D) None of the above
Ans: B
76. Principle of VIDICON camera tube is based on
(A) Photo Emission Effect (B) Photo Conduction Effect (C) Field Effect (D) Photo Voltaic Effect
Ans: B
77. A PIN Diode is frequently used as a
(A) Peak Clipper
(B) Harmonic Generator
(C) Voltage Regulator
(D) Switching Diode for frequencies up to GHZ range
Ans: D
78. For proper working of a clamper, time constant of the circuit should be
(A) Large (B) Small (C) Equal To Signal Time Period (D) Greater Than 5 Times Signal Time Period
Ans: A
79. A UJT has Rbb=10 KΩ and Rb2 = 4 KΩ. Its intrinsic standoff ratio is
(A) 0.6 (B) 0.4 (C) 2.5 (D) 5/3
Ans: A
80. The main purpose of modulation is to
(A) Combine two waves of different frequencies
(B) Achieve wave shaping of the carrier wave
(C) Transmitting low frequency information over long distance efficiently
(D) Produce side bands
Ans: C
81. In AM, the power content of the carrier is maximum when m equals to
(A) 0 (B) l (C) 0.8 (D) 0.5
Ans: A
82. In the context of IC fabrication, metallisation means
(A) Connecting metallic wires
(B) Forming interconnecting conducting patterns
(C) Covering with a metallic cap
(D) All of the above
Ans: B
83. Commonly used ICs are ___________.
(A) Thin Film (B) Monolithic (C) Hybrid (D) None of the above
Ans: B
84. An Audio Amplifier IC is an example of
(A) Digital IC (B) Linear IC (C) Both (A) and (B) (D) None of the above
Ans: B
85. LM317 Voltage Regulator, what is the minimum value of voltage required between its input and output in order to supply power to an internal circuit ?
(A) 1V (B) 3V (C) 5V (D) 10V
Ans: B
86. What is PSRR Value of an Ideal Op-Amp ?
(A) 0 (B) Unity
(C) Infinite (D) Unpredictable
Ans: A
87. In PLL, the capture range is always _______the lock range.
(A) Greater than (B) Less than
(C) Equal to (D) None of the above
Ans: B
88. What is the nature of Radiation Pattern of an Isotropic Antenna ?
(A) Dough-Nut (B) Elliptical
(C) Hyperbolic (D) Spherical
Ans: D
89. Which among the following is not a disadvantage of Rhombic Antenna ?
(A) Requirement of large space
(B) Reduced transmission efficiency
(C) Wastage of power in terminating resistor
(D) Maximum radiated power along main axis
Ans: D
90. If an Antenna draws 12A current and radiates 4KW, then what will be its Radiation Resistance ?
(A) 22.22 Ω (B) 27.77 Ω(C) 33.33 Ω (D) 39.77 Ω
Ans: B
91. The general arrangement of PLA is
(A) AND/OR structure (B) OR/AND structure
(C) NAND/NOR structure (D) EX-OR/OR structure
Ans: A
92. Serial access memory at the chip level is classed as memory that has
(A) Shift Registers
(B) Counters
(C) Access time is independent of location of data
(D) Internally stored data is used
Ans: A
93. The FPGA refers to
(A) First Programmable Gate Array (B) First Program Gate Array
(C) Field Program Guard Array (D) Field Programmable Gate Array
Ans: D
94. The Full Form of VLSI is
(A) Very Large Scale Integration (B) Very Least Scale Integration
(C) Very Long Single Integration (D) None of the above
Ans: A
95. VHDL is being used for
(A) Documentation
(B) Verification
(C) Synthesis of Large Digital Design
(D) None of the above
Ans: D
96. Which of the following has the capability to store the information permanently ?
(A) RAM (B) ROM
(C) Both RAM and ROM (D) None of the above
Ans: B
97. In a Computer, Registers are present
(A) Within Control Unit (B) Within RAM
(C) Within ROM (D) Within CPU
Ans: D
98. The capacity of a memory unit is
(A) The number of binary input stored (B) The number of words stored
(C) The number of bytes stored (D) None of the above
Ans: C
99. Speed of Data Transmission in 4-G Network of Telecom is
(A) 386 Kbps - 2 Mbps (B) 2 Mbps
(C) 100 Mbps - 1 Gbps (D) 2 Mbps - 1 Gbps
Ans: C
100. The sequence of operations in which Pulse Code Modulation is
(A) Sampling, quantizing, encoding (B) Sampling, encoding quantizing,
(C) Quantizing, sampling, encoding (D) None of the above
Ans: A
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