Telecommunication systems
MCQ
(1)The term that is used to design to provide communication in between two moving units is
called
a. Cellular station
b. Cellular telephony
c. Cellular frames
d. Cellular signals
(2) In cellular telephony each slot holds
a. 320 Bits
b. 322 Bits
c. 324 Bits
d. 330 Bits
(3) In cellular telephony, the radius of the cell is typically
a. 1 to 12 mi
b. 2 to 14 mi
c. 2 to 16 mi
d. 2 to 20 mi
(4)The guided media is categorized further into ___categories.
a. Two
b. Three
c. Four
d. Five
(5). The _____has two conductors wires wounded around each other and each surrounded by an
insulating material.
a. Twisted pair cable
b. Shielded twisted pair
c. Unshielded twisted pair cable.
d. All above
(6). The ______carries signals of higher frequency than the twisted pair cable.
a. Coaxial cable
b. Fiber optic
c. Twisted pair cable
d. None of these
(7)Voltage signal generated by a microphone is
a. Digital in Nature
b. Hybrid in Nature
c. Analog in Nature
d. None of the above
(8)The unguided media is categorized into
a. Radio waves
b. Microwaves
c. infrared waves
d. All above
(9)_____are used for short range communication.
a. Infrared waves
b. Microwaves
c. Radio waves
d. None of these
(10)Categories of guided media are
a. Twisted pair cable
b. Coaxial cable
c. Optical fiber
d. All above
(11)Different types of communication channels
a. Written letters and memos
b. Chats and messaging
c. Blogs
d. All above
(12)Cellular system antennas on towers that span up to ____in diameter.
a. 20 miles
b. 40 miles
c. 60 miles
d. 80 miles
(13)A digital cellular phone technology that started in ___.
a. England
b. Europe
c. China
d. All above
(14) Which of the following communication transmission media is open space or free space?
a. Line
b. Radio
c. Transmitter
d. None of These
(15)Every GSM phone becomes immediately programmed after inserting the ___card.
a. Memory card
b. SIM card
c. Video card
d. None of these
(16)CDMA's basic principles were developed to secure radio signals at the beginning of_______.
a. World War I
b. World War II
c. World War III
d. All above
(17)The network is distributed over land areas called "____"
a. System
b. Cells
c. SIM
d. Location
(18)Which of the following is the power rating of radio transmitters ?
a. 10 kw
b. 10 w
c. 10 mw
d. All of the above
(19)Signals are classified into….
a. In-band and out-of-band signaling
b. Line versus register signaling
c. Compelled signaling
d. All above
(20)Out-of-band signaling has been used since _____.
a. 1960s
b. 1970s
c. 1980s
d. 1990s
(21)_____ is a class of telecommunications signaling protocols.
a. Line signaling
b. Register signaling
c. Out band
d. None of these
(22)Digisat’s late model fleet of calibrated systems test equipment includes:
a. Anritsu SiteMaster Network Analyzers
b. Florida RF Labs Precision Test Cables and Adapters
c. Fluke Fiber OTDR Testers & Digital Volt Meter
d. All above
(23)Test Solutions cover a broad client base
a. Enterprise
b. Media
c. Broadcast
d. All Above
(24)_______ employs a signaling channel that is dedicated to a specific bearer channel.
a. Channel-associated signaling
b. Common-channel signaling
c. Compelled signaling
d. None of these
(25)Subscriber signaling refers to the signaling between the telephone and the_____.
a. Telephone exchange
b. Telephone booth
c. Telephone office
d. All above
(26) Different types of switching
a. Local switches
b. Tandem switches
c. Both a & b
d. None of these
(27)Pulse modulation is often used in …….
a. Telegraphy
b. FL band
c. Microwave band
d. None of These
(28)This is used to interconnect switches at various sites within the network.
a. Tandem switch
b. Local switches
c. Transit switch
d. All above
(29)Switches have ____main requirements.
a. Three
b. Four
c. Five
d. Six
(30)Main switching techniques are:
a. Circuit switching
b. message switching
c. packet switching
d. All above
(31)What is must include in a complete communication system?
a. A transmitter and receiver
b. A transmitter, a receiver, and a channel
c. A multiplexer, a demultiplexer, and a channel
d. A transmitter, a receiver, and a spectrum analyzer
(32)Which of the following person had sent the first radio signal across the Atlantic Ocean?
a. Bell
b. Maxwell
c. Marconi
d. Hertz
(33)Message switching was the pioneer to _____ .
a. Packet switching
b. Circuit switching
c. Both a & b
d. None of these
(34)The average number of requests for connection per unit of time.
a. Calling rate
b. Holding time
c. GOS
d. None of these
(35)The ______is extracted at the destination and used by the application software.
a. Payload
b. Header
c. Footer
d. All above
(36)Digisat’s Comprehensive Network Testing Services Support:
a. Video
b. Cellular
c. Mobile
d. All above
(37)Satellite RF & Systems Testing are
a. RFI & EMI Analysis
b. Monitor & Control Systems
c. Antenna De-Ice
d. All Above
(38)IP Networks are
a. Firewall/VPN
b. Routers & Switches
c. IPS/IDS & DPI
d. All Above
(39)Wireless Network Systems Testing is
a. Load, Regression & Stability Tests
b. Network Roll-Out Tests
c. Acceptance Testing
d. All above
(40)_____allows data transmission when there is a complete circuit (route or path) established
between the source node and the destination node.
a. Circuit switching
b. message switching
c. packet switching
d. none of these
(41)Steps required in order to establish a connection with circuit switching are
a. Setup of link
b. hold-up of link
c. Release of link
d. All above
(42)____ is an indirect way of generating FM?
a. Varactor diode modulator
b. Armstrong modulator
c. Reactance FET modulator
d. None of These
(43) Which kind of switching technique indicates the transfer of coded values from input to
output during the same interval of time?
a. Space Switching
b. Time Switching
c. Combination Switching
d. None of the above
(44) By which name/s is the Grade of Service (GOS) well-known?
a. Call congestion
b. Time congestion
c. Both a and b
d. None of the above
(45)Which shape of switches is not adopted normally due to non-usability of both way trunks?
a. Circular
b. Triangular
c. Hexagonal
d. Square
(46) Which type of data network supports the interconnection of computers within highly
populated area?
a. LAN
b. WAN
c. MAN
d. None of the above
(47) In a cellular telephone system, which type of interference results from imperfect design of
filters in receivers by allowing nearby frequencies to enter the receiver?
a. Co-channel Interference
b. Adjacent-channel Interference
c. Both a and b
d. None of the above
(48) Which method of cellular network assists in minimizing the co-channel interference
associated with the angle of degree?
a. Cell Splitting
b. Cell Sectoring
c. Cell Segmentation & Dualization
d. None of the above
(49) Which type of connection takes place between an incoming trunk and an outgoing trunk?
a. Local call
b. Outgoing call
c. Incoming call
d. Transit call
(50) In message switching system, an incoming message gets ____ especially if the required
route is busy.
a. lost
b. stored in a queue & retransmitted
c. sampled
d. recovered
