Spread the love0% 2 Quiz no 3 1 / 100 1) The typical fiber optic cable consists of very narrow strand of glass called: a) Cladding b) Base c) Core d) Sheet 2 / 100 2) Computer transmit data in the form of codes. a) None b) Binary c) Analog d) Decimal 3 / 100 3) What binary bits are used to encode digital data? a) Os and 1s. b) 1s c) .0 to 9 d) Os 4 / 100 4) Which of the following coding schemes primarily.used by IBM? a) BCD b) EBCDIC c) Unicode d) ASCII 5 / 100 5) The types.of signals can be: a) Analog b) Digital c) Analog d) Digital and Analog 6 / 100 6) How many characters ASCII 8-bit code can represent? a) 500 b) 256 c) 364 d) 128 7 / 100 7) All of the following are guided communications media EXCEPT: a) Coaxial cable b) Twisted pair c) Satellite d) Fiber-optic cable 8 / 100 8) Select unguided media from the following: a) Twisted pair b) Fiber optic c) Satellite d) Coaxial 9 / 100 9) Internet surfing is an example of: a) Frequency b) Duplex transmission. c) Half duplex transmission d) .Full duplex transmission 10 / 100 10) Which of the following transmission media is used in LAN? a) Satellite b) Telephone line c) Coaxial cable d) Microwave 11 / 100 11) Data is transmitted block by block in: . a) Synchronous transmission b) Asynchronous transmission c) Isochronous transmission d) Analog transmission 12 / 100 12) Which of the following is not a communication media? a) Twisted Pair b) Fiber optic c) Modem d) Microwave 13 / 100 13) Bps is short for: a) Bits per second b) Binary packets a second c) Bytes per second d) Baud per second 14 / 100 14) Which of the following cables consists of a single core of solid copper? a) Digital b) Coaxial c) Unicode d) Medium 15 / 100 15) The chart,graph,pictures and freehand drawing are examples of: a) Text data b) Image data c) Numeric data d) Audio data 16 / 100 16) Which of the following is the fastest communication mode a) Simple b) d.Duplex c) Medium d) Full duplex 17 / 100 17) The internal transfer of binary data in a computer uses mode. a) Direct b) Parallel c) Serial d) .Sequential 18 / 100 18) Transmission media are usually categorized as_ a) Good and bad b) Baseband and broadband c) Guided or unguided d) Fixed or unfixed 19 / 100 19) How many devices can exist between a sending and receiving host? a) 10 b) Any. c) 2 d) 1 20 / 100 20) The number of times a wave repeats during a specific time interval is called a) Frequency b) Phase c) Frequency d) Amplitude 21 / 100 21) The number of frequencies that can fit on a link at one time is called: a) Bandwidth b) Codec c) Demodulation d) Modulation 22 / 100 22) Which multiplexing technique shifts each signal to a different carrier frequency? a) FDM b) TDM c) DFM d) TTD 23 / 100 23) BCD stands for: a) Binary coded decimal b) Bidirectional coded decimal c) Base coded decimal d) Byte coded decimal 24 / 100 24) The process of converting a digital signal to an analog signal is called: a) Demodulation b) Conversion c) Modulation d) Merging 25 / 100 25) code is 7-bit or.8-bit code. a) Unicode b) EBCDIC c) ASCII d) BCD: 26 / 100 26) Satellite transmission stations that can both send and receive messages are called: a) Moon stations b) Mars stations c) Jupiter stations d) Earth stations 27 / 100 27) What is another term for unguided media? a) Unbounded b) Infrared c) Radiated d) Wire. 28 / 100 28) The computers in wide geographical area can be efficiently connected by: a) Satellite b) Coaxial cable c) Twisted pair d) WiFi 29 / 100 29) Which communications medium requires line-of-sight? a) Fiber optic. b) Microwavec. c) Coaxial d) Twisted pair 30 / 100 30) The height of wave within a given period of time is known as: a) Phase b) Amplitude c) Pulse d) Frequency 31 / 100 31) Transmission from a satellite to its earth-based station is called: a) Baselink b) Downlink c) Geolink d) Uplink 32 / 100 32) Analog signal is measured in: a) Hertz b) Volt c) WATTS d) Amplitude 33 / 100 33) Which of the following converts digital signals to analog and analog to digital? a) Repeater b) . Multiplexer c) . Codec d) Modem 34 / 100 34) A type of communication that sends that uses a clock to control timing of bits being sent is called: a) Isochronous transmission b) Asynchronous transmission c) Monochronous transmission d) Synchronous transmission 35 / 100 35) The conversation over a walkie-talkie radio is-an example of: a) Full-duplex transmission b) Simplex transmission: c) .Duplex transmission d) Half-duplex transmission 36 / 100 36) ASCII code was.developed by: a) Full-duplex b) Simplex transmission c) Duplex d) ANSI.. 37 / 100 37) Digital signal represents a sequence of values. a) Discrete b) Bytes c) Continuous. d) Unique 38 / 100 38) Which value in start bit indicates that the transmission line is idle? a) .4 b) .2 c) .3 d) .1 39 / 100 39) BCD code is a_ a) 15 b) 4. c) .8. d) 32 40 / 100 40) Which modem is used to transmit data signals through air instead of cable? a) All b) External c) Wireless d) Internal 41 / 100 41) An important property of fiber optic cable is: a) Noise b) Refraction c) Degradation d) Radiation 42 / 100 42) The transmission rate of modem can be measured in: a) Words per second b) Bits per second c) Characters per second d) Bytes per second 43 / 100 43) The’transmission in which data can be received and. sent simultaneously is called: a) Simplex b) Duplex c) Half-duplex d) Full-duplex 44 / 100 44) The electromagnetic or light waves representing data are called: a) Signal b) Information c) Coding d) Mode 45 / 100 45) A type of communication that sends data using flow control to synchronize data between sender a) .2 b) Asynchronous transmission c) Synchronous transmission d) Isochronous 46 / 100 46) Digital signals are commonly known as: a) Broadband b) Narrowband c) Baseband d) Band 47 / 100 47) Most data .transmitted over telephone lines uses:. a) Direct transmission b) Serial transmission c) Parallel transmission d) Sequential transmission 48 / 100 48) Which transmission allows data to travel in one direction at a time? a) .Half Duplex transmission b) Simplex transmission.. c) Duplex transmission d) Full Duplex transmission 49 / 100 49) Which type of data consists of words,sentences and paragraphs? a) Text. b) Audio c) Video d) Numeric 50 / 100 50) Each set of bit pattern is called: a) Coding b) ASCII c) Code d) Unicode 51 / 100 51) What is another term for guided media? a) Radiated b) Bounded c) Wireless d) Infrared 52 / 100 52) A telephone conversation is’an example of:. a) Full-duplex transmission: b) .Duplex transmission c) Half-duplex transmission d) Simplex transmission 53 / 100 53) Which of the following technique uses modulation? a) Baseband b) Bitband c) Bandwidth d) Broadband. 54 / 100 54) The signals produced by a computer to send over phone line must be converted to: a) Analog b) Digital c) High d) Low 55 / 100 55) Frequency is measured in: a) Amps b) Hertz c) Bps. d) Seconds 56 / 100 56) Modem stands for: a) Modulation/demodulationn b) Modification/demodification c) Mode/ Modeless d) Modeling/Demonstration 57 / 100 57) Transmission from Earth to satellite is called: a) Uplink b) Low link c) downlink d) High link 58 / 100 58) Full-duplex communication is made. possible by the.devices known as: a) Modem b) .Mouse c) Multiplexer: d) ..Keyboard. 59 / 100 59) The music and speech.represent: a) Numeric b) Audio c) Text d) Image 60 / 100 60) The medium in which signals travel through a cable or wire is called: a) Guided media b) Unguided media c) International medias d) Local media 61 / 100 61) Which of the following is not a:data communication mode? a) Half-duplex b) Full-duplex. c) Auto. d) Simplex Half-duplex 62 / 100 62) Sound,light and radio waves are examples of a) Green b) Digital c) Pulse d) Analog 63 / 100 63) The process of transferring data electronically from one place to another is caled a) Data communication b) NIC c) Data Sequence d) Data processing 64 / 100 64) Transmission that is used without timing signal is called: a) Asynchronous b) Isochronous c) Parallel d) Synchronous 65 / 100 65) Which of the following code can represent up to 65,536 symbols? a) ASCII b) BCD c) EBCDIC d) Unicode 66 / 100 66) Which of the following devices uses parallel transmission? a) Printer b) Mouse c) .Keyboard d) All 67 / 100 67) Start/stop bits are not required in this type of transmission. a) Synchronous b) .Asynchronous c) Monochronous d) .Isochronous 68 / 100 68) Unicode uses: a) 64-bit b) 32-bit c) 16-bit d) 132-bit’ 69 / 100 69) Which medium transmits voice and data via air as high-frequency radio waves? a) Twisted pair b) Fiber-optic cable c) Coaxial cable d) Microwave 70 / 100 70) All of the following are elements of data communication system EXCEPT: a) Voltage b) Medium c) Receiver d) Sender 71 / 100 71) signal is a continuous electrical signal in the form of wave. a) Analog b) Green c) Digital d) Red 72 / 100 72) .Which transmission type transmits data one character at a time a) Parallel: b) Asynchronous c) Ethernet. d) Synchronous 73 / 100 73) Which of the following can severally affect the quality of satellite transmission? a) Moon b) Mountains c) Light rays d) Bad weather 74 / 100 74) How many modes of data communication are available? a) .2 b) 3. c) 4 d) 3. 75 / 100 75) The number of times a wave repeats during a specific time interval is called a) Frequency b) Amplitude c) Phase d) Frequency 76 / 100 76) The communication channels can be divided into_categories: a) Seven b) Two c) Eight d) Four 77 / 100 77) .The conversation over a walkie-talkie radio is-an example of: a) Duplex transmission b) Full-duplex transmission c) Simplex transmission d) Half-duplex transmission. 78 / 100 78) Television and radio broadcasts are examples of: a) Full-duplex transmission b) .Duplex transmission c) Simplex transmission d) Half-duplex transmission 79 / 100 79) Physical path that connects the source and receiver is known as: a) Linear medium b) Encoder c) Communication channel d) Decoder 80 / 100 80) Which kind of signal is mostly required by telephone lines? a) Analog b) Low c) Digital d) High 81 / 100 81) EBCDIC is a a) 8-bit b) .6-bit c) 4-bit d) 7-bit 82 / 100 82) How many characters can Unicode represcnt? a) 10,000 b) 500 c) 65,536 d) 15,000 83 / 100 83) A fiber-optic cable’s core is measured in: a) Inches b) AWG c) Microns d) Centimeters 84 / 100 84) An example of non-numerical data is: a) Roll No b) Bank balance c) Marks d) Address 85 / 100 85) The diameter of fiber optical cable is: a) 62.5 microns b) 62.5 mm c) 62.5 cm d) 62.5 m 86 / 100 86) Which of the following type of data is used to display actions and movement?. a) Image b) Audio. c) Video d) Text 87 / 100 87) The time taken by a data signal to reach to moon and then back to earth was about: a) 2 ms b) 2 minutes c) 2 hours d) 2-second 88 / 100 88) The process of converting analog to digital signal is known as: a) Merging b) Modulation c) Demodulation d) Data sequencing 89 / 100 89) Which is the most secure type of transmission medium? a) .Coaxial cable b) Fiber-optic cable c) Twisted-wire pair d) Microwave 90 / 100 90) IBM stands for: a) Internet Bulletin Machine b) International Business machine c) Internet Business Machine d) Internat 91 / 100 91) Which of the following consists of two insulated copper wires twisted together? a) Coaxial cables b) Submarine c) Twisted-pair wire d) Fiber optic 92 / 100 92) 50.This type of transmission is sometimes called start/stop transmission a) Synchronous b) Parallel c) Isochronous d) .Asynchronous 93 / 100 93) Which of the following coding schemes uses 4-bit code? a) EBCDIC b) BCD c) Unicode d) ASCII. 94 / 100 94) The mode that is like a two way street with traffic flowing in both direction at the.same time is ca a) Duplex transmission b) Full Duplex transmission c) Half Duplex transmission d) Simplex transmission 95 / 100 95) An advantage of synchronous over asynchronous transmission is: a) Simplicity b) Error checking c) Speed d) Two-way 96 / 100 96) A modem allows computers to access other computers through following types of connection a) Offline b) Phone lines c) Wireless d) Cable 97 / 100 97) Which type of modem can be added to the system unit through expansion slot? a) External b) Internal c) All d) Wireless 98 / 100 98) How many characters ASCII 7-bit code can represent? a) 364 b) 500 c) 256 d) 128 99 / 100 99) Which communication technique can transmit the data over long distance? a) Baseband b) Bitband c) Bandwidth d) Broadband 100 / 100 100) Which of the following is the insulation on a fiber-optic cable? a) Housing b) Sheathing c) Cladding d) . 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