EC6702-Third MCQ Test
1. ____________ limits receiver sensitivity.
a) Noise
b) Depletion layer
c) Avalanche
d) Current
2. A ____________ performs the linear conversion of the received optical signal
into an electric current.
a) Receiver
b) Converter
c) Detector
d) Reflector
3.__________ are provided to reduce distortion and to provide a suitable signal
shape for the filter.
a) Detector
b) Equalizer
c) Filters
d) Amplifier
4.A _________ maximizes the received signal-to-noise ratio in the receiver
circuitry.
a) Filter
b) Equalizer
c) Detector
d) Reflector
EC6702-Third MCQ Test
5. How many structures of pre-amplifiers exist?
a) Two
b) Three
c) Four
d) One
6.__________ limits the maximum distance between the optical fiber transmitter
and receiver.
a) Attenuation
b) Transmission
c) Equipment
d) Fiber length
7.The quantum efficiency of an optical detector should be high. State whether
the given
statement is true or false.
a) True
b) False
8.Which of the following does not explain the requirements of an optical
detector?
a) High quantum efficiency
b) Low bias voltages
c) Small size
d) Low fidelity
EC6702-Third MCQ Test
9.The photocurrent of an optical detector should be __________
a) Less
b) More
c) Linear
d) Non-linear
10.How many types of optical detectors are available?
a) One
b) Four
c) Two
d) Three
11. A ____________ digital hierarchy was required to enable the international
communications network to evolve in the optical fiber era.
a) Asynchronous
b) Dedicated
c) Seismic
d) Synchronous
12.The ___________ sits at the top of hierarchy of the OSI layer model.
a) Session layer
b) Transport layer
c) Application layer
d) Data link layer
EC6702-Third MCQ Test
13.. The routing and wavelength assignment problem addresses the core issue of
_____________
a) Traffic patterns in a network
b) Wavelength adjustment
c) Wavelength continuity constraint
d) Design problem
14.A _________________ is a network connecting several regional or national
networks together.
a) Long-haul network
b) Domain network
c) Short-haul network
d) Erbium network
15.SONET stands for
a) synchronous optical network
b) synchronous operational network
c) stream optical network
d) shell operational network
16.In SONET, STS-1 level of electrical signalling has the data rate of
a) 51.84 Mbps
b) 155.52 Mbps
c) 466.56 Mbps
d) none of the mentioned
EC6702-Third MCQ Test
17.The photonic layer of the SONET is similar to the __________ of OSI model.
a) network layer
b) data link layer
c) physical layer
d) none of the mentioned
18.In SONET, each synchronous transfer signal STS-n is composed of
a) 2000 frames
b) 4000 frames
c) 8000 frames
d) 16000 frames
19.What is SDH?
a) sdh is similar standard to SONET developed by ITU-T
b) synchronous digital hierarchy
c) both (a) and (b)
d) none of the mentioned
20.SONET/SDH is a synchronous network using synchronous
A) TDM multiplexing
B) CDMA multiplexing
C) TDM demultiplexing
D) CDMA demultiplexing
EC6702-Third MCQ Test
ANSWERS
1-A
11-D
2-c
12-C
3-B
13-C
4-A
14-A
5-B
15-A
6-A
16-A
7-A
17-C
8-D
18-C
9-C
19-B
10-D
20-A