Description : Bits can be sent over guided and unguided media as analog signal by ___________ a. digital modulation b. amplitude modulation c. frequency modulation d. phase modulation
Last Answer : a. digital modulation
Description : Computers cannot communicate with each other directly over telephone lines because they usedigitalpulses whereas telephone lines useanalog sound frequencies. What is the name of the device which permits digital to analog ... A. Interface B. Modem C. Attenuation D. Teleprocessor E. None of the above
Last Answer : Modem
Description : In a synchronous modem, the digital-to-analog converter transmits signal to the a. equilizer b. modulator c. demodulator d. terminal e. none of aobve
Last Answer : equilizer
Description : ________conversion is therepresentation ofanalog information by an analog signal. A) Digital-to-analog B) Analog-to-analog C) Analog-to-digital D) Digital-to-digita
Last Answer : Analog-to-analog
Description : _______ conversionis the process of changing one of the characteristics ofan analog signal basedon the informationin the digitaldata. A) Digital-to-analog B) Analog-to-analog C) Analog-to-digital D) Digital-to-digital
Last Answer : Digital-to-analog
Description : A(n)_________ signal is a composite analogsignal with an infinite bandwidth. A) digital B) analog C) either (a)or (b) D) neither (a) nor (b
Last Answer : digital
Description : A digital computer did not score over an analog computer in terms of a. Speed b. Accuracy c. Cost d. Memory
Last Answer : Accuracy
Description : The computer that process both analog and digital is called a. Analog computer b. Digital computer c. Hybrid computer d. Mainframe computer
Last Answer : Hybrid computer
Description : A hybrid computer a. Resembles digital computer b. Resembles analog computer c. Resembles both a digital and analog computer d. None of the above
Last Answer : Resembles both a digital and analog computer
Description : Compared to analog signals, digital signals A. allow faster transmission B. are moreaccurate C. both (a)and (b) D. All of theabove E. None of the above
Last Answer : both (a)and (b)
Description : The most common technique to change an analog signal to digitaldata is called __________. A) PAL B) PCM C) sampling D) none of the abov
Last Answer : PCM
Description : The piece of hardware that converts your computers digital signal to an analog signal that can travel over telephone lines is called a: a) Red Wire b) Blue Cord c) Tower d) Modem e) None of These
Last Answer : d) Modem
Description : In analog computer a. Input is first converted to digital form b. Input is never converted to digital form c. Output is displayed in digital form d. All of above
Last Answer : All of above
Description : An example of digital, rather than analog, communication is a. DDD b. DDS c. WATS d. DDT
Last Answer : DDS
Description : The process of converting analog signals into digital signals so they can be processed by a receiving computer is referred to as: a. modulation b. demodulation c. synchronizing d. digitising
Last Answer : digitising
Description : The moderntelephone network isnow ________. A) digital B) analog C) digital as well as analog D) none of the above
Last Answer : digital as well as analog
Description : The original telephone network, which is referred to as the plainold telephone system (POTS), was an ________system. A) digital B) analog C) digital as well as analog D) none of the above
Last Answer : analog
Description : Data from a computer are_______; the local loop handles _______ signals. A) analog; analog B) analog; digital C) digital; digital D) digital; analog
Last Answer : digital; analog
Description : FSM isan _________technique. A) analog B) digital C) either (a)or (b) D) none of the above
Description : AM and FM are examplesof ________ conversion. A) digital-to-digital B) digital-to-analog C) analog-to-analog D) analog-to-digita
Last Answer : analog-to-analog
Description : ASK, PSK, FSK,and QAM are examples of________conversion. A) digital-to-digital B) digital-to-analog C) analog-to-analog D) analog-to-digital
Last Answer : digital-to-analog
Description : __________ conversion involves three techniques: line coding,block coding, and scrambling. A) Analog-to-digital B) Digital-to-analog C) Analog-to-analog D) Digital-to-digital
Last Answer : Digital-to-digital
Description : PCM is an example of _______ conversion. A) digital-to-digital B) digital-to-analog C) analog-to-analog D) analog-to-digital
Last Answer : analog-to-digital
Description : _______ signals canhave only alimited number of values. A) Analog B) Digital C) (a) or (b) D) None of the above
Last Answer : Digital
Description : _____ signals can have an infinite number of values ina range. A) Analog B) Digital C) (a) or (b) D) None of the above
Last Answer : Analog
Description : _______ data have discretestates and take discrete values. A) Analog B) Digital C) (a) or (b) D) None of the above
Description : _____ data are continuousand take continuous values. A) analog B) digital C) (a) or (b) D) none of the above
Description : Data canbe ________. A) analog B) digital C) (a) or (b) D) none of the above
Last Answer : (a) or (b)
Description : Demodulation is aprocessof A. converting analog to digital signals B. converting digital to analogsignals C. multiplexing various signals intoone high speed line signals D. performing data description
Last Answer : converting analog to digital signals
Description : A single channel is shared by multiple signals by _____ a. analog modulation b. digital modulation c. multiplexing d. phase modulation
Last Answer : c. multiplexing
Description : The process of converting analog signals into digital signals so they can be processed by a receiving computer is referred to as a. modulation b. demodulation c. synchronizing d. Digitizing
Last Answer : b. demodulation
Description : Find the height of an infinitely long conductor from point P which is carrying current of 6.28A and field intensity is 0.5 units. a) 0.5 b) 2 c) 6.28 d) 1
Last Answer : b) 2
Description : Which of the following statements is NOT correct ? (A) Computer is capable of processing only digital signal (B) Computer is capable of analysing both quantitative and qualitative data (C) Appropriate ... for processing the data (D) Computer is capable of processing digital as well as analog signals
Last Answer : Answer: A
Description : Ina _____scheme,all the signal levels are onone sideof the time axis,either above or below. A) polar B) bipolar C) unipolar D) all of theabove
Last Answer : unipolar
Description : The distance a simple signal can travel in one period is called ………… A. Wavelength B. propagation speed C. Frequency D. both a and b
Last Answer : A. Wavelength
Description : TCP helps in converting the digital signal to analog signal and vice_versa. -Technology
Last Answer : False The process of converting digital signal into analog signal is called modulation and is done by a modem.
Last Answer : Digital and analog are basically a type of signal that is used to exchange information. In shortcut analog technology the information is converted into electric pulse of different wavelengths. ... for computing and electronic devices. . Cost: Analog technology is comparatively cheaper than digital.
Description : A technique used by codes to convert an analog signal into a digital bit stream is known as A) Pulse code modulation B) Pulse stretcher C) Query processing D) Queue management
Last Answer : Answer : A
Description : Noise occurring in the presence of signal resulting from a mismatch between the exact value of an analog signal and the closet available quantizing step in a digital coder. A. Quantizing noise B. Thermal noise C. Impulse noise D. Crosstalk
Last Answer : A. Quantizing noise
Description : The conversion of digital signal into analog for purposes of transmitting into the telephone line is done through ______. A. ISDN B. Radio C. RS232C D. Modem
Last Answer : D. Modem
Description : Digital transmission provides a higher level of signal quality than analog transmission because A. repeaters regenerate digital pulses and remove distorstion B. digital signals are easier to sample than ... and cannot easily be distorted D. analog signals are continuous and not easily distorted.
Last Answer : A. repeaters regenerate digital pulses and remove distorstion
Description : Which performance parameter is the minimum amount of optical power required to achieve a specific bit-error rate (BER) in digital systems or a given signal-to-noise ratio (SNR) in analog systems?
Last Answer : Receiver sensitivity.
Description : Differentiate analog and digital signal.
Last Answer : Analog signals are defined for every value of time and they take on values in the continuous interval (a,b) where ‘a’ can be -∞ and ‘b’ can be ∞. Ex : x(t)=cos πt ; -∞
Description : A technique used by codes to convert an analog signal into a digital bit stream is known as a. Pulse code modulation b. Pulse stretcher c. Query processing d. Queue management
Last Answer : a. Pulse code modulation
Description : Which of the following statement is correct ? (A) Modem is a software (B) Modem helps in stabilizing the voltage (C) Modem is the operating system (D) Modem converts the analog signal into digital signal and vice-versa
Last Answer : (D) Modem converts the analog signal into digital signal and vice-versa
Description : Indecodinga digital signal, the receiver calculates a running average of thereceived signal power, called the _______. A) baseline B) base C) line D) none of the above
Last Answer : baseline
Description : A _________ digital signal includes timing informationin the data beingtransmitted. A) self-synchronizing B) self-modulated C) self-transmitted D) none of the above
Last Answer : self-synchronizing