Mobile Computing Mid - I, September - 2014

1._____________ with Shorter wavelengths have difficulty passing through solid objects
  • Electromagnetic waves
  • Heat waves
  • ultra waves
  • ocean waves
Answer: A
2.Higher frequencies tend to be most useful for ____________radio communications.
  • line of sight
  • Scattered
  • Amplitude modulated
  • medium wave
Answer: B
3.Which of the following is the electromagnetic spectrum generally used for radio communications?
  • in the range of frequencies between 9Hz to 275Hz
  • in the range of frequencies between 9kHz to 275GHz
  • in the range of frequencies between 9MHz to 275MHz
  • in the range of frequencies between 9GHz to 275THz
Answer: B
4.Early MTS systems operated in ____________ mode.
  • simplex
  • half duplex
  • full duplex
  • all of the above
Answer: B
5.Abbreviation for public switched telephone network is ___________________.
  • PSTK
  • PUTN
  • PSTN
  • PSTP
Answer: C
6.In a GSM system BTS and BSC together form ______________.
  • network substation
  • Base Station Subsystem
  • maintenance subsystem
  • operational subsystem
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.
  • SS#5
  • SS#6
  • SS#7
  • SS#8
Answer: C
8.Which of the following functions of the GSM speech coder and decoder are usually combined in one building block?
  • codec (Coder/DE Coder)
  • coder
  • decoder
  • modulator
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?
  • Destination-sequenced distance-vector routing
  • table-driven routing
  • Wireless Routing
  • Global State Routing
Answer: B
10.In GPRS system, what does SGSN stand for?
  • System Gateway serving network
  • Serving GPRS Support Nodes
  • System GPRS serving Nodes
  • Serving Gateway support network
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