Mobile Computing Mid - I, September - 2014
1._____________ with Shorter wavelengths have difficulty passing through solid objects
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Electromagnetic waves
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Heat waves
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ultra waves
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ocean waves
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Answer: A
2.Higher frequencies tend to be most useful for ____________radio communications.
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line of sight
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Scattered
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Amplitude modulated
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medium wave
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Answer: B
3.Which of the following is the electromagnetic spectrum generally used for radio communications?
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in the range of frequencies between 9Hz to 275Hz
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in the range of frequencies between 9kHz to 275GHz
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in the range of frequencies between 9MHz to 275MHz
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in the range of frequencies between 9GHz to 275THz
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Answer: B
4.Early MTS systems operated in ____________ mode.
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simplex
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half duplex
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full duplex
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all of the above
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Answer: B
5.Abbreviation for public switched telephone network is ___________________.
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PSTK
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PUTN
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PSTN
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PSTP
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Answer: C
6.In a GSM system BTS and BSC together form ______________.
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network substation
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Base Station Subsystem
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maintenance subsystem
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operational subsystem
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Answer: B
7.In a GSM system each MSC and register is known as a Signaling Point (SP) and is identified by its Signaling Point Code (SPC) within the _________ network.
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SS#5
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SS#6
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SS#7
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SS#8
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Answer: C
8.Which of the following functions of the GSM speech coder and decoder are usually combined in one building block?
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codec (Coder/DE Coder)
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coder
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decoder
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modulator
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Answer: A
9.In which of the following protocols, each node maintains one or more tables containing routing information to every other node in the network?
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Destination-sequenced distance-vector routing
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table-driven routing
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Wireless Routing
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Global State Routing
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Answer: B
10.In GPRS system, what does SGSN stand for?
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System Gateway serving network
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Serving GPRS Support Nodes
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System GPRS serving Nodes
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Serving Gateway support network
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Answer: B
11.Increased security is the main advantage of the ____________ IR system in wireless communication.
Answer: Point-to-point
12.___________________ is/are registered by Equipment Identity Register (EIR)
Answer: Equipment data
13.__________ and ___________ are the administration tasks of the Network Management (NM).
Answer: Subscriber management, Billing
14.If the channel is dispersive because of multipath, the signals arriving at the receiver will no longer be _____________ and will introduce some _____________________.
Answer: Orthogonal, multiple-access interference
15.HSCSD stands for ___________ and the CDMA-based version of GPRS is known as ___________.
Answer: High Speed Circuit Switched Data, 1XRTT
16.Convolutional codes can also be defined using ____________ and ________________
Answer: Shift registers, generator polynomials
17.In GSM architecture, ___________ and _____________ are security-related registers whereas ___________ and ___________ databases are queried by the network for user registration and localization.
Answer: AUC, EIR, HLR, VLR
18.Cellular architecture is based on _______________.
Answer: Mobile networks
19._________________ is the license-free portion of the spectrum in the radio system.
Answer: Industrial, Scientific, and Medical (ISM) band
20._____________ inferences are suffered by Mobile radio channels.
Answer: Frequency-selective