Sampling Theory and Pulse Modulation Question & AnswersJuly 6, 2021 By WatElectronics This article lists 100 Sampling Theory and Pulse Modulation MCQs for engineering students. All the Sampling Theory and Pulse Modulation Questions & Answers given below includes solution and link wherever possible to the relevant topic.Sampling theory is a basic process to convert continuous-time signals to discrete-time signals. When we convert continuous-time signal to discrete-time signal, we need to take a sufficient number of samples, so that we can reconstruct the original signal from the sampled signal. The number of samples to be taken mainly depends on the maximum frequency of the signal. Basically, there are three types of sampling they are ideal sampling, natural sampling, and flat-top sampling. The amplitude, position, width are the different parameters to characterize a pulse.In pulse modulation, the carrier waves are in the form of pulses, whereas in continuous modulation, the carrier waves are in the form of continuous. In pulse time modulation, the carrier wave of the pulse varies on the time axis in pulse width modulation, and the pulses of the carrier waves are varied according to the message signal. In pulse position modulation, the pulses of the carrier wave are varied according to the message signal. Simple random sampling, systematic sampling, stratified, and cluster sampling are the probability sampling techniques. The strengths of convenience sampling are the least time-consuming, most convenient, and least expensive, the judgment sampling is convenient, and cost-effective.1). The modulation is classified into _______ One Two Three Four HintThe modulation is classified into two types they are continuous wave modulation and pulse modulation 2). _____________ are continuous wave modulations? Amplitude modulation Angle modulation Analog modulation Both a and b HintBoth amplitude and angle modulations are continuous wave modulation3). _____________ are pulse-type modulations? Amplitude modulation Digital modulation Analog modulation Both b and c HintBoth analog and digital modulations are pulse-type modulations4). _____________ are type of angle modulation Frequency modulation Phase modulation Pulse amplitude modulation Both a and b HintBoth frequency and phase modulations are types of angle modulation5). ___________ are type of analog modulation PAM PTM Both a and b None of the above HintBoth PAM and PTM are types of analog modulation6). Pulse width modulation is a type of _________ modulation Analog Angle Digital None of the above HintPulse width modulation is a type of analog modulation7). Pulse code modulation is a type of _________ modulation Analog Angle Digital None of the above HintPulse code modulation is a type of digital modulation8). In _______ modulation, the carrier waves are in the form of pulses Pulse modulation Continuous modulation Both a and b None of the above HintIn pulse modulation, the carrier waves are in the form of pulses9). In _______ modulation, the carrier waves are in the form of continuous Pulse modulation Continuous modulation Both a and b None of the above HintIn continuous modulation, the carrier waves are in the form of continuous10). The pulse width modulation is a type of ________ modulation Pulse time Pulse amplitude Digital None of the above HintThe pulse width modulation is a type of pulse time modulation11). In _______ modulation, the carrier wave of the pulse varies on the time axis PTM PAM PWM None of the above HintIn pulse time modulation, the carrier wave of the pulse varies on the time axis 12). In _______ modulation, the pulses of the carrier wave are varied according to the message signal PTM PAM PWM None of the above HintIn pulse width modulation, the pulses of the carrier wave are varied according to the message signal13). The pulse position modulation is a type of _________ modulation Analog Angle Digital None of the above HintThe pulse position modulation is a type of analog modulation14). In _______ modulation, the pulses of the carrier wave are varied according to the message signal PTM PAM PWM PPM HintIn pulse position modulation, the pulses of the carrier wave are varied according to the message signal15). The sampling is divided into ______ types One Two Three Four HintThe sampling is divided into two types they are large sample test and small sample test16). If the size of the sample is greater than or equal to thirty is called a ____________ Large sample test Small sample test Both a and b None of the above HintIf the size of the sample is greater than or equal to thirty is called a large sample test17). If the size of the sample is less than thirty is called a ____________ Large sample test Small sample test Both a and b None of the above HintIf the size of the sample is less than thirty is called a small sample test18). The sample standard deviation is represented by _________ S µ σ None of the above HintThe sample standard deviation is represented by a letter S19). The population mean is represented by _____________ S µ σ None of the above HintThe population mean is represented by a symbol µ20). The population standard deviation is represented by _____________ S µ σ None of the above HintThe population standard deviation is represented by a symbol σ21). The probability sampling is also known as ____________ sampling Representative Non-representative Either a or b None of the above HintProbability sampling is also known as a representative sampling22). The non-probability sampling is also known as ____________ sampling Representative Non-representative Either a or b None of the above HintNon-probability sampling is also known as non-representative sampling23). The non-probability sampling divided into ___________ types One Two Three Four HintThe non-probability sampling divided into four types they are quota sampling, convenience sampling, judgment sampling, and purposeful sampling24). _____________ are the probability sampling techniques Simple random sampling Systematic sampling Stratified and cluster sampling All of the above HintSimple random sampling, systematic sampling, stratified, and cluster sampling are the probability sampling techniques25). The strengths of the convenience sampling is ___________ Least time consuming Most convenient Least expensive All of the above HintThe strengths of the convenience sampling are Least time consuming, most convenient, and least expensiveSampling Theory and Pulse Modulation MCQs for Exams26). The strengths of the judgement sampling is ___________ Convenient Not time consuming All of the above HintThe judgment sampling is convenient, cost-effective, and it is not time-consuming27). The cluster sampling is __________ Easy to implement Cost-effective Both a and b None of the above HintThe cluster sampling is easy to implement and cost-effective28). The strengths of the systematic sampling is ___________ It can increase representativeness Sampling frame is not necessary Easy to implement All of the above HintThe strengths of the systematic sampling is easy to implement, the sampling frame is not necessary, and it can increase representativeness29). The simple random sampling can be ____________ Easily understood Results are projectable Both a and b None of the above HintThe simple random sampling can be easily understood and the results are projectable30). _________ error is a type of random error Sampling Non-sampling Both a and b None of the above HintSampling error is a type of random error31). _________ error is a type of random or non-random error Sampling Non-sampling Both a and b None of the above HintNon-sampling error is a type of random or non-random error32). The non-sampling error occurs in _________ Census Sample Both a and b None of the above HintThe non-sampling error occurs in both census and sample33). The sampling error occurs in _________ Census Sample Both a and b None of the above HintThe sampling error occurs only in sample34). The variable parameter of a pulsed carrier in PAM is __________ Amplitude Width Position None of the above HintThe variable parameter of a pulsed carrier in the PAM is amplitude35). The variable parameter of a pulsed carrier in PWM is __________ Amplitude Width Position None of the above HintThe variable parameter of a pulsed carrier in the PWM is width36). The variable parameter of a pulsed carrier in PPM is __________ Amplitude Width Position None of the above HintThe variable parameter of a pulsed carrier in the PPM is position37). The bandwidth requirement is high in _________ PAM PPM PWM Both b and c HintThe bandwidth requirement is high in both PPM and PWM38). The bandwidth requirement is low in _________ PAM PPM PWM None of the above HintThe bandwidth requirement is low in PAM39). The noise immunity is low in _________ PAM PPM PWM None of the above HintThe noise immunity is low in PAM40). The noise immunity is high in _________ PAM PPM PWM Both b and c HintThe noise immunity is high in both PPM and PWM41). The transmitted power in PAM varies with ________ Amplitude of pulses Variation in width Remains constant All of the above HintThe transmitted power in PAM varies with the amplitude of pulses42). The transmitted power in PWM varies with ________ Amplitude of pulses Variation in width Remains constant All of the above HintThe transmitted power in PWM varies with variation in width43). The transmitted power in PPM varies with ________ Amplitude of pulses Variation in width Remains constant All of the above HintThe transmitted power in PPM remains constant44). In PAM information contained in _________ variations Amplitude Position Width All of the above HintIn PAM information contained in amplitude variations45). In PPM information contained in _________ variations Amplitude Position Width All of the above HintIn PPM information contained in position variations46). The advantages of PPM are ________ Noise immunity is good Requires constant transmitter power output Both a and b None of the above HintIn PPM the noise immunity is good and it requires a constant transmitter power output47). The disadvantages of PPM are ________ Requires large bandwidth Requires synchronization between receiver and transmitter Both a and b None of the above HintThe PPM requires large bandwidth and synchronization between receiver and transmitter48). The PPM used for ____ Optical communication system Military application Both a and b None of the above HintThe PPM used for an optical communication system, military application, etc49). The advantages of PWM are ___________ More immune to noise Synchronization between receiver and transmitter is not required Both a and b None of the above HintThe PWM is immune to noise and the synchronization between receiver and transmitter is not required50). The digital pulse modulation categorized into __________ One Two Three Four HintThe digital pulse modulation categorized into three types they are PCM, delta modulation, and adaptive delta modulationSampling Theory and Pulse Modulation Important MCQs51). The pulse time modulation categorized into __________ One Two Three Four HintThe pulse time modulation categorized into two types they are PWM and PPM52). The analog pulse modulation categorized into __________ One Two Three Four HintThe analog pulse modulation categorized into two types they are PTM and PAM53). The stratified sampling categorized into __________ One Two Three Four HintThe stratified sampling categorized into two types they are proportionate and disproportionate54). The convenience sampling is ___________ Simple Easy Convenient All of the above HintConvenience sampling is simple, easy, and convenient55). The cluster sampling categorized into __________ One Two Three Four HintThe cluster sampling categorized into three types they are one-stage sampling, two-stage sampling, and multi-stage sampling56). The two-stage cluster sampling categorized into __________ One Two Three Four HintThe two-stage cluster sampling categorized into two types they are simple cluster sampling and probability proportionate to size sampling57). The quota sampling is _________ Simple Easy Convenient All of the above HintThe quota sampling is simple, easy, and convenient58). The random sampling is categorized into __________ One Two Three Four HintRandom sampling is categorized into two types they are simple random sampling and stratified random sampling59). How many types of transmission techniques are there? One Two Three Four HintThere are two types of transmission techniques are there they are baseband transmission and modulation transmission60). In how many ways the AM wave can represent? One Two Three Four HintThe AM wave can represent in a time domain and frequency domain61). In _________, the modulation takes place at high level modulation High-level modulation Low-level modulation Both a and b None of the above HintIn high-level modulation, the modulation takes place at high-level modulation62). Which class amplifier is used in high-level modulation? A B C AB HintClass C amplifier is used in high-level modulation63). ___________ modulation is used in high power broadcast High-level modulation Low-level modulation Both a and b None of the above HintHigh-level modulation is used in high power broadcast64). The low-level modulation used in _________ Walkie-talkie TV transmitters In laboratory equipment All of the above HintThe low-level modulation used in walkie-talkie, tv transmitters, in laboratory equipments, etc65). The efficiency is low in _________ modulation High-level modulation Low-level modulation Both a and b None of the above HintThe efficiency is low in low-level modulation compared to high-level modulation66). The efficiency is high-level modulation is __________ High Very High Low Very low HintThe efficiency is high-level modulation is very high67). The PAM is categorized into ____________ One Two Three Four HintThe PAM is categorized into two types they are single polarity PAM and double polarity PAM68). In PAM __________ Both demodulation and modulation is simple Construction of receiver and transmitter circuits is easy Both a and b None of the above HintIn PAM Both demodulation and modulation is simple and the construction of receiver and transmitter circuits is easyRead more about PAM69). The disadvantages of PAM is ___________ Requires large bandwidth Noise is more Power required is less All of the above HintThe PAM requires large bandwidth, noise is more, and power required is less in PAM70). The PAM used in __________ Ethernet communication Photo-biology Both a and b None of the above HintThe PAM used in ethernet communication, photo-biology, etc71).The advantages of PTM are _____________ Consumes low power Efficiency is about 90% Noise interference is less All of the above HintThe PTM consumes low power, the efficiency is about 90%, and the noise interference is less72). The disadvantages of PTM are ________ Circuit is more complex System is expensive Both a and b None of the above HintIn PTM the circuit is more complex and the system is expensive73).The PTM used in __________ amplifiers Audio Video Both a and b None of the above HintThe PTM used in audio amplifiers74). In PPM _____________ Noise interference is less Requires less power compared to PAM Both a and b None of the above HintIn PPM the noise interference is less and it requires less power compared to PAM75). The system in PPM is _________ Complex Requires more bandwidth Both a and b None of the above HintThe system in PPM is complex and requires more bandwidthSampling Theory and Pulse Modulation MCQs for Quiz76). The pulse position modulation used in ___________ Remote controlled cars Telecommunication systems Air traffic control system All of the above HintThe pulse position modulation used in remote-controlled cars, telecommunication systems, air traffic control system, etc77). The pulse code modulation used in ___________ Telephony Space communication system Satellite communication system All of the above HintThe pulse code modulation used in telephony, space communication system, satellite communication system, etc78). The pulse width modulation signal has ___________ voltage levels One Two Three Four HintThe pulse width modulation signal has two voltage levels79). The non-sampling errors are categorized into ___________ One Two Three Four HintThe non-sampling errors are categorized into three types they are specification errors, ascertainment errors, and tabulation errors80). The ascertainment errors categorized into ___________ One Two Three Four HintThe ascertainment errors categorized into two types they are coverage errors and content errors81). In _________ modulation, there is no feedback in receiver or transmitter Pulse Delta Adaptive delta None of the above HintIn pulse modulation, there is no feedback in receiver or transmitter82). The number of bits used for the sample in PCM is ______ 4 8 16 4/8/16 HintThe number of bits used for the sample in PCM is 4/8/1683). The step size in pulse code modulation is _________ Fixed Variable Fixed or variable None of the above HintThe step size in pulse code modulation is fixed or variable84). The step size in differential pulse code modulation is _________ Fixed Variable Fixed or variable None of the above HintThe step size in differential pulse code modulation is fixed or variable85). The sampling performed in __________ ways One Two Three Four HintThe sampling performed in two ways they are sampling with replacement and sampling without replacement86). The natural sampling and flat-top sampling are two types of _______ PAM PWM PPM None of the above HintNatural sampling and flat-top sampling are two types of pulse amplitude modulations87). The advantages of DPCM are ______________ Signaling rate is less Bandwidth is less Both a and b None of the above HintIn DPCM the signaling rate and bandwidth both are less88). ____________ are the advantages of DM Signaling rate is low Channel Bandwidth is low Both a and b None of the above HintIn delta modulation both signaling rate and channel bandwidth are low89). What are the disadvantages of DM? Slope overload present Granular noise present Both a and b None of the above HintThe disadvantages of DM are both slope overload and granular noise is present Read more about Delta Modulation90). The advantages of adaptive delta modulation are __________ Improved SNR Reduction in granular noise and slope overload Low signaling rate All of the above HintImproved SNR, reduction in granular noise and slope overload, low signaling rate are the advantages of adaptive delta modulation91). ____________ are the two major noise sources in PAM systems Channel noise Quantization noise Both a and b None of the above HintChannel noise and quantization noise are the two major noise sources in PAM systems92). ___________ modulation is similar to AM PAM PCM PPM PWM HintPulse amplitude modulation is similar to AM93). ___________ modulation is similar to FM PAM PCM PPM PWM HintPulse width modulation is similar to FM Read more about Frequency Modulation94). ___________ modulation is similar to PM PAM PCM PPM PWM HintPulse position modulation is similar to PM95). The PAM is classified into ____________ One Two Three Four HintThe PAM is classified into two types they are natural and flat tope PAM96). The quantization error is categorized into __________ One Two Three Four HintThe quantization error is categorized into two types they are round off error and overload error97). The distortions present in delta modulation are _________ Slope overload Granular noise Both a and b None of the above HintThe distortions present in delta modulation are slope overload distortion and granular noise98). What is the standard form of PDM? Pulse Delta Modulation Phase Duration Modulation Pulse Distortion Modulation None of the above HintThe standard form of PDM is Phase Duration Modulation99). The sampling methods are of __________ types One Two Three Four HintThe sampling methods are of three types they are ideal, natural, and flattop samplings100). __________ modulation is also known as PWM PAM PCM PPM dPDM HintPulse duration modulation is also known as PWM Time is Up! Time's up