0% 2 Quiz no 3 1 / 100 1) EBCDIC is a a) .6-bit b) 4-bit c) 8-bit d) 7-bit 2 / 100 2) Digital signals are commonly known as: a) Broadband b) Band c) Narrowband d) Baseband 3 / 100 3) Internet surfing is an example of: a) .Full duplex transmission b) Frequency c) Half duplex transmission d) Duplex transmission. 4 / 100 4) .Which transmission type transmits data one character at a time a) Asynchronous b) Synchronous c) Ethernet. d) Parallel: 5 / 100 5) signal is a continuous electrical signal in the form of wave. a) Red b) Analog c) Digital d) Green 6 / 100 6) A fiber-optic cable’s core is measured in: a) Centimeters b) Microns c) Inches d) AWG 7 / 100 7) Which modem is used to transmit data signals through air instead of cable? a) External b) All c) Wireless d) Internal 8 / 100 8) The number of times a wave repeats during a specific time interval is called a) Frequency b) Frequency c) Phase d) Amplitude 9 / 100 9) The time taken by a data signal to reach to moon and then back to earth was about: a) 2 hours b) 2 ms c) 2-second d) 2 minutes 10 / 100 10) Television and radio broadcasts are examples of: a) Half-duplex transmission b) Full-duplex transmission c) .Duplex transmission d) Simplex transmission 11 / 100 11) The’transmission in which data can be received and. sent simultaneously is called: a) Full-duplex b) Half-duplex c) Simplex d) Duplex 12 / 100 12) Which of the following coding schemes uses 4-bit code? a) Unicode b) ASCII. c) EBCDIC d) BCD 13 / 100 13) A telephone conversation is’an example of:. a) Half-duplex transmission b) Full-duplex transmission: c) .Duplex transmission d) Simplex transmission 14 / 100 14) The number of times a wave repeats during a specific time interval is called a) Phase b) Frequency c) Amplitude d) Frequency 15 / 100 15) IBM stands for: a) International Business machine b) Internat c) Internet Business Machine d) Internet Bulletin Machine 16 / 100 16) Which of the following devices uses parallel transmission? a) All b) Printer c) .Keyboard d) Mouse 17 / 100 17) The number of frequencies that can fit on a link at one time is called: a) Demodulation b) Codec c) Modulation d) Bandwidth 18 / 100 18) The diameter of fiber optical cable is: a) 62.5 microns b) 62.5 m c) 62.5 mm d) 62.5 cm 19 / 100 19) The internal transfer of binary data in a computer uses mode. a) Direct b) Parallel c) .Sequential d) Serial 20 / 100 20) Each set of bit pattern is called: a) Coding b) Code c) ASCII d) Unicode 21 / 100 21) The electromagnetic or light waves representing data are called: a) Coding b) Information c) Mode d) Signal 22 / 100 22) Which of the following coding schemes primarily.used by IBM? a) BCD b) Unicode c) EBCDIC d) ASCII 23 / 100 23) A type of communication that sends that uses a clock to control timing of bits being sent is called: a) Asynchronous transmission b) Isochronous transmission c) Monochronous transmission d) Synchronous transmission 24 / 100 24) What binary bits are used to encode digital data? a) Os and 1s. b) .0 to 9 c) Os d) 1s 25 / 100 25) Satellite transmission stations that can both send and receive messages are called: a) Earth stations b) Moon stations c) Mars stations d) Jupiter stations 26 / 100 26) 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 27 / 100 27) The signals produced by a computer to send over phone line must be converted to: a) Low b) High c) Analog d) Digital 28 / 100 28) Which of the following converts digital signals to analog and analog to digital? a) . Multiplexer b) Repeater c) Modem d) . Codec 29 / 100 29) Computer transmit data in the form of codes. a) Decimal b) Binary c) None d) Analog 30 / 100 30) All of the following are guided communications media EXCEPT: a) Twisted pair b) Coaxial cable c) Satellite d) Fiber-optic cable 31 / 100 31) Frequency is measured in: a) Amps b) Seconds c) Hertz d) Bps. 32 / 100 32) An important property of fiber optic cable is: a) Radiation b) Degradation c) Refraction d) Noise 33 / 100 33) Which of the following technique uses modulation? a) Bandwidth b) Broadband. c) Bitband d) Baseband 34 / 100 34) 50.This type of transmission is sometimes called start/stop transmission a) .Asynchronous b) Parallel c) Isochronous d) Synchronous 35 / 100 35) Which of the following type of data is used to display actions and movement?. a) Image b) Video c) Audio. d) Text 36 / 100 36) The communication channels can be divided into_categories: a) Seven b) Two c) Eight d) Four 37 / 100 37) Data is transmitted block by block in: . a) Synchronous transmission b) Analog transmission c) Asynchronous transmission d) Isochronous transmission 38 / 100 38) An example of non-numerical data is: a) Marks b) Roll No c) Address d) Bank balance 39 / 100 39) How many devices can exist between a sending and receiving host? a) 1 b) 10 c) Any. d) 2 40 / 100 40) A type of communication that sends data using flow control to synchronize data between sender a) Isochronous b) Synchronous transmission c) Asynchronous transmission d) .2 41 / 100 41) Which communication technique can transmit the data over long distance? a) Baseband b) Bandwidth c) Broadband d) Bitband 42 / 100 42) Which is the most secure type of transmission medium? a) Fiber-optic cable b) Microwave c) .Coaxial cable d) Twisted-wire pair 43 / 100 43) Which of the following features is provided with a modem? a) Self-testing b) Speeds c) All d) Transmission rate 44 / 100 44) What is another term for guided media? a) Bounded b) Wireless c) Radiated d) Infrared 45 / 100 45) Transmission that is used without timing signal is called: a) Asynchronous b) Isochronous c) Synchronous d) Parallel 46 / 100 46) code is 7-bit or.8-bit code. a) ASCII b) Unicode c) EBCDIC d) BCD: 47 / 100 47) Which of the following code can represent up to 65,536 symbols? a) Unicode b) ASCII c) EBCDIC d) BCD 48 / 100 48) The process of converting analog to digital signal is known as: a) Data sequencing b) Modulation c) Merging d) Demodulation 49 / 100 49) Which of the following is the fastest communication mode a) Medium b) Full duplex c) d.Duplex d) Simple 50 / 100 50) Which type of data consists of words,sentences and paragraphs? a) Audio b) Text. c) Numeric d) Video 51 / 100 51) Unicode uses: a) 32-bit b) 16-bit c) 64-bit d) 132-bit’ 52 / 100 52) Transmission from Earth to satellite is called: a) High link b) downlink c) Uplink d) Low link 53 / 100 53) Full-duplex communication is made. possible by the.devices known as: a) .Mouse b) Modem c) ..Keyboard. d) Multiplexer: 54 / 100 54) The medium in which signals travel through a cable or wire is called: a) Local media b) International medias c) Unguided media d) Guided media 55 / 100 55) How many characters ASCII 8-bit code can represent? a) 364 b) 128 c) 500 d) 256 56 / 100 56) BCD stands for: a) Byte coded decimal b) Binary coded decimal c) Bidirectional coded decimal d) Base coded decimal 57 / 100 57) The chart,graph,pictures and freehand drawing are examples of: a) Image data b) Audio data c) Text data d) Numeric data 58 / 100 58) Which of the following transmission media is used in LAN? a) Microwave b) Coaxial cable c) Satellite d) Telephone line 59 / 100 59) Which medium transmits voice and data via air as high-frequency radio waves? a) Fiber-optic cable b) Twisted pair c) Coaxial cable d) Microwave 60 / 100 60) Transmission from a satellite to its earth-based station is called: a) Baselink b) Geolink c) Downlink d) Uplink 61 / 100 61) Which of the following can severally affect the quality of satellite transmission? a) Mountains b) Moon c) Light rays d) Bad weather 62 / 100 62) 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) Simplex transmission c) Half Duplex transmission d) Full Duplex transmission 63 / 100 63) The computers in wide geographical area can be efficiently connected by: a) Coaxial cable b) Twisted pair c) Satellite d) WiFi 64 / 100 64) Which of the following is the insulation on a fiber-optic cable? a) Housing b) Cladding c) . Braiding d) Sheathing 65 / 100 65) BCD code is a_ a) 4. b) 32 c) 15 d) .8. 66 / 100 66) A modem allows computers to access other computers through following types of connection a) Phone lines b) Cable c) Offline d) Wireless 67 / 100 67) Transmission media are usually categorized as_ a) Fixed or unfixed b) Good and bad c) Guided or unguided d) Baseband and broadband 68 / 100 68) The process of converting a digital signal to an analog signal is called: a) Modulation b) Conversion c) Demodulation d) Merging 69 / 100 69) Digital signal represents a sequence of values. a) Bytes b) Continuous. c) Unique d) Discrete 70 / 100 70) An advantage of synchronous over asynchronous transmission is: a) Speed b) Error checking c) Two-way d) Simplicity 71 / 100 71) Which value in start bit indicates that the transmission line is idle? a) .4 b) .1 c) .3 d) .2 72 / 100 72) Which of the following is not a:data communication mode? a) Full-duplex. b) Auto. c) Simplex Half-duplex d) Half-duplex 73 / 100 73) Which communications medium requires line-of-sight? a) Coaxial b) Twisted pair c) Fiber optic. d) Microwavec. 74 / 100 74) Bps is short for: a) Bits per second b) Baud per second c) Bytes per second d) Binary packets a second 75 / 100 75) Select unguided media from the following: a) Satellite b) Twisted pair c) Coaxial d) Fiber optic 76 / 100 76) Which of the following consists of thin glass to transmit beams of light? a) Twisted pair b) Microwave c) Coaxial cable d) Fiber-optic cable 77 / 100 77) Which type of modem can be added to the system unit through expansion slot? a) Internal b) External c) All d) Wireless 78 / 100 78) The transmission rate of modem can be measured in: a) Bytes per second b) Bits per second c) Characters per second d) Words per second 79 / 100 79) How many modes of data communication are available? a) 3. b) .2 c) 4 d) 3. 80 / 100 80) Which multiplexing technique shifts each signal to a different carrier frequency? a) TDM b) TTD c) DFM d) FDM 81 / 100 81) Which of the following cables consists of a single core of solid copper? a) Medium b) Unicode c) Digital d) Coaxial 82 / 100 82) The height of wave within a given period of time is known as: a) Amplitude b) Phase c) Pulse d) Frequency 83 / 100 83) The process of transferring data electronically from one place to another is caled a) Data communication b) Data Sequence c) Data processing d) NIC 84 / 100 84) Which kind of signal is mostly required by telephone lines? a) High b) Digital c) Low d) Analog 85 / 100 85) Physical path that connects the source and receiver is known as: a) Linear medium b) Communication channel c) Encoder d) Decoder 86 / 100 86) The types.of signals can be: a) Digital b) Analog c) Digital and Analog d) Analog 87 / 100 87) Analog signal is measured in: a) Amplitude b) WATTS c) Hertz d) Volt 88 / 100 88) Which transmission allows data to travel in one direction at a time? a) Duplex transmission b) .Half Duplex transmission c) Simplex transmission.. d) Full Duplex transmission 89 / 100 89) Most data .transmitted over telephone lines uses:. a) Sequential transmission b) Direct transmission c) Parallel transmission d) Serial transmission 90 / 100 90) All of the following are elements of data communication system EXCEPT: a) Voltage b) Medium c) Receiver d) Sender 91 / 100 91) What is another term for unguided media? a) Infrared b) Wire. c) Radiated d) Unbounded 92 / 100 92) Which of the following consists of two insulated copper wires twisted together? a) Submarine b) Fiber optic c) Coaxial cables d) Twisted-pair wire 93 / 100 93) How many characters can Unicode represcnt? a) 10,000 b) 500 c) 65,536 d) 15,000 94 / 100 94) Start/stop bits are not required in this type of transmission. a) .Asynchronous b) Monochronous c) Synchronous d) .Isochronous 95 / 100 95) Modem stands for: a) Modification/demodification b) Modeling/Demonstration c) Modulation/demodulationn d) Mode/ Modeless 96 / 100 96) The music and speech.represent: a) Numeric b) Audio c) Text d) Image 97 / 100 97) How many characters ASCII 7-bit code can represent? a) 364 b) 256 c) 128 d) 500 98 / 100 98) Which of the following is not a communication media? a) Fiber optic b) Modem c) Twisted Pair d) Microwave 99 / 100 99) The typical fiber optic cable consists of very narrow strand of glass called: a) Base b) Core c) Cladding d) Sheet 100 / 100 100) Sound,light and radio waves are examples of a) Pulse b) Green c) Digital d) Analog Your score is LinkedIn Facebook Twitter VKontakte 5403-Unit-01Download5403-Uniit-2Download5403-Uniit-3Download5403-Uniit-4Download5403-Uniit-5Download5403-Uniit-6Download5403-Uniit-7Download5403-Uniit-8Download5403-Uniit-9Download Post Views: 197 Post navigation AIOU Test 04/01/2023 Quiz 4 date 06/01/2023