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