How many types of hetero-junctions are available?
a) Two
b) One c) Three d) Four
a) Two
b) One c) Three d) Four
Anonymous Quiz
30%
A
30%
B
33%
C
7%
D
Stimulated emission by recombination of injected carriers is encouraged in __________
a) Semiconductor injection laser
b) Gas laser c) Chemist laser d) Dye laser
a) Semiconductor injection laser
b) Gas laser c) Chemist laser d) Dye laser
Anonymous Quiz
50%
A
35%
B
15%
C
0%
D
Gain guided laser structure are __________
a) Chemical laser
b) Gas laser c) DH injection laser d) Quantum well laser
a) Chemical laser
b) Gas laser c) DH injection laser d) Quantum well laser
Anonymous Quiz
17%
A
21%
B
38%
C
25%
D
Laser modes are generally separated by few __________
a) Tenths of micrometer
b) Tenths of nanometer c) Tenths of Pico-meter d) Tenths of millimeter
a) Tenths of micrometer
b) Tenths of nanometer c) Tenths of Pico-meter d) Tenths of millimeter
Anonymous Quiz
7%
A
41%
B
44%
C
7%
D
Which of the following technology distributes the coverage of the cell and extends the cell boundary to hard-to-reach places?
a) Sectoring
b) Cell splitting c) Micro cell zone concept d) Scattering
a) Sectoring
b) Cell splitting c) Micro cell zone concept d) Scattering
Anonymous Quiz
17%
A
34%
B
24%
C
24%
D
Which of the following do not undergo free space propagation?
a) Wired telephone systems
b) Wireless line of sight radio links c) Microwave line of sight radio links d) Satellite communication system
a) Wired telephone systems
b) Wireless line of sight radio links c) Microwave line of sight radio links d) Satellite communication system
Anonymous Quiz
41%
A
24%
B
14%
C
21%
D
Which of the most widely used model for signal prediction in urban areas?
a) Okumura model
b) Attenuation factor model c) Ericsson Multiple Breakpoint Model d) Log distance path loss model
a) Okumura model
b) Attenuation factor model c) Ericsson Multiple Breakpoint Model d) Log distance path loss model
Anonymous Quiz
17%
C
29%
B
29%
A
25%
D
Which of the following is not an effect caused by multipath in radio channel?
a) Random frequency modulation
b) Time dispersion c) Rapid changes in signal strength d) Power of base station
a) Random frequency modulation
b) Time dispersion c) Rapid changes in signal strength d) Power of base station
Anonymous Quiz
31%
A
31%
B
15%
C
23%
D
Which of the following is not a principle shape factor?
a) Azimuthal direction of maximum fading
b) Angle of arrival c) Angular spread d) Angular constriction
a) Azimuthal direction of maximum fading
b) Angle of arrival c) Angular spread d) Angular constriction
Anonymous Quiz
42%
A
29%
B
21%
C
8%
D
Which of the following is the ratio of the throughput data rate per Hertz?
a) Spectral density
b) Bandwidth efficiency c) Power density d) Power efficiency
a) Spectral density
b) Bandwidth efficiency c) Power density d) Power efficiency
Anonymous Quiz
7%
A
57%
B
25%
C
11%
D
Which of the following is not a linear modulation technique?
a) π/4 QPSK
b) OQPSK c) BPSK d) FSK
a) π/4 QPSK
b) OQPSK c) BPSK d) FSK
Anonymous Quiz
38%
A
22%
B
28%
C
13%
D
What is the set of possible carrier frequencies in FH-SS?
a) Hop
b) Hopset c) Symbols d) Chips
a) Hop
b) Hopset c) Symbols d) Chips
Anonymous Quiz
20%
A
53%
B
13%
C
13%
D
Which of the following is not an open standard?
a) Bluetooth
b) WWW c) HTML d) VPN
a) Bluetooth
b) WWW c) HTML d) VPN
Anonymous Quiz
35%
A
12%
B
21%
C
32%
D
Bluetooth standard is named after ___________
a) King Ronaldo Bluetooth
b) Pope Vincent Bluetooth c) King Herald Bluetooth d) Pope Francis Bluetooth
a) King Ronaldo Bluetooth
b) Pope Vincent Bluetooth c) King Herald Bluetooth d) Pope Francis Bluetooth
Anonymous Quiz
24%
A
21%
B
56%
C
0%
D
Quantization noise occurs in ________
a) Frequency Division Multiplexing
b) Time Division Multiplexing c) Delta Modulation d) PCM
a) Frequency Division Multiplexing
b) Time Division Multiplexing c) Delta Modulation d) PCM
Anonymous Quiz
17%
A
14%
B
33%
C
36%
D
👍1👏1
Which is the greatest disadvantage of Pulse Code Modulation?
a) highly prone to noise
b) cannot travel long distances c) its inability to handle analog signals d) large bandwidth is required for it
a) highly prone to noise
b) cannot travel long distances c) its inability to handle analog signals d) large bandwidth is required for it
Anonymous Quiz
9%
A
9%
B
29%
C
53%
D
In AM pilot carrier, transmission has ________
a) carrier and part of one side band
b) two side bands and a carrier c) two side bands d) carrier, one side band and part of other side band
a) carrier and part of one side band
b) two side bands and a carrier c) two side bands d) carrier, one side band and part of other side band
Anonymous Quiz
30%
A
33%
B
18%
C
18%
D
What is the reason of “envelope” in an amplitude modulated signal?
a) noise signal
b) carrier signal D) nematic signal C) baseband signal
a) noise signal
b) carrier signal D) nematic signal C) baseband signal
Anonymous Quiz
15%
A
26%
B
31%
C
28%
D
What is the cause of Overmodulation?
a) distortion
b) splatter c) both distortion and splatter d) half reception of signals
a) distortion
b) splatter c) both distortion and splatter d) half reception of signals
Anonymous Quiz
24%
A
19%
B
49%
C
8%
D