Sampling Theory and Pulse Modulation Question & Answers July 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 Hint 2). _____________ are continuous wave modulations? Amplitude modulation Angle modulation Analog modulation Both a and b Hint 3). _____________ are pulse-type modulations? Amplitude modulation Digital modulation Analog modulation Both b and c Hint 4). _____________ are type of angle modulation Frequency modulation Phase modulation Pulse amplitude modulation Both a and b Hint 5). ___________ are type of analog modulation PAM PTM Both a and b None of the above Hint 6). Pulse width modulation is a type of _________ modulation Analog Angle Digital None of the above Hint 7). Pulse code modulation is a type of _________ modulation Analog Angle Digital None of the above Hint 8). In _______ modulation, the carrier waves are in the form of pulses Pulse modulation Continuous modulation Both a and b None of the above Hint 9). In _______ modulation, the carrier waves are in the form of continuous Pulse modulation Continuous modulation Both a and b None of the above Hint 10). The pulse width modulation is a type of ________ modulation Pulse time Pulse amplitude Digital None of the above Hint 11). In _______ modulation, the carrier wave of the pulse varies on the time axis PTM PAM PWM None of the above Hint 12). In _______ modulation, the pulses of the carrier wave are varied according to the message signal PTM PAM PWM None of the above Hint 13). The pulse position modulation is a type of _________ modulation Analog Angle Digital None of the above Hint 14). In _______ modulation, the pulses of the carrier wave are varied according to the message signal PTM PAM PWM PPM Hint 15). The sampling is divided into ______ types One Two Three Four Hint 16). 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 Hint 17). 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 Hint 18). The sample standard deviation is represented by _________ S µ σ None of the above Hint 19). The population mean is represented by _____________ S µ σ None of the above Hint 20). The population standard deviation is represented by _____________ S µ σ None of the above Hint 21). The probability sampling is also known as ____________ sampling Representative Non-representative Either a or b None of the above Hint 22). The non-probability sampling is also known as ____________ sampling Representative Non-representative Either a or b None of the above Hint 23). The non-probability sampling divided into ___________ types One Two Three Four Hint 24). _____________ are the probability sampling techniques Simple random sampling Systematic sampling Stratified and cluster sampling All of the above Hint 25). The strengths of the convenience sampling is ___________ Least time consuming Most convenient Least expensive All of the above Hint Sampling Theory and Pulse Modulation MCQs for Exams 26). The strengths of the judgement sampling is ___________ Convenient Not time consuming All of the above Hint 27). The cluster sampling is __________ Easy to implement Cost-effective Both a and b None of the above Hint 28). The strengths of the systematic sampling is ___________ It can increase representativeness Sampling frame is not necessary Easy to implement All of the above Hint 29). The simple random sampling can be ____________ Easily understood Results are projectable Both a and b None of the above Hint 30). _________ error is a type of random error Sampling Non-sampling Both a and b None of the above Hint 31). _________ error is a type of random or non-random error Sampling Non-sampling Both a and b None of the above Hint 32). The non-sampling error occurs in _________ Census Sample Both a and b None of the above Hint 33). The sampling error occurs in _________ Census Sample Both a and b None of the above Hint 34). The variable parameter of a pulsed carrier in PAM is __________ Amplitude Width Position None of the above Hint 35). The variable parameter of a pulsed carrier in PWM is __________ Amplitude Width Position None of the above Hint 36). The variable parameter of a pulsed carrier in PPM is __________ Amplitude Width Position None of the above Hint 37). The bandwidth requirement is high in _________ PAM PPM PWM Both b and c Hint 38). The bandwidth requirement is low in _________ PAM PPM PWM None of the above Hint 39). The noise immunity is low in _________ PAM PPM PWM None of the above Hint 40). The noise immunity is high in _________ PAM PPM PWM Both b and c Hint 41). The transmitted power in PAM varies with ________ Amplitude of pulses Variation in width Remains constant All of the above Hint 42). The transmitted power in PWM varies with ________ Amplitude of pulses Variation in width Remains constant All of the above Hint 43). The transmitted power in PPM varies with ________ Amplitude of pulses Variation in width Remains constant All of the above Hint 44). In PAM information contained in _________ variations Amplitude Position Width All of the above Hint 45). In PPM information contained in _________ variations Amplitude Position Width All of the above Hint 46). The advantages of PPM are ________ Noise immunity is good Requires constant transmitter power output Both a and b None of the above Hint 47). The disadvantages of PPM are ________ Requires large bandwidth Requires synchronization between receiver and transmitter Both a and b None of the above Hint 48). The PPM used for ____ Optical communication system Military application Both a and b None of the above Hint 49). 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 Hint 50). The digital pulse modulation categorized into __________ One Two Three Four Hint Sampling Theory and Pulse Modulation Important MCQs 51). The pulse time modulation categorized into __________ One Two Three Four Hint 52). The analog pulse modulation categorized into __________ One Two Three Four Hint 53). The stratified sampling categorized into __________ One Two Three Four Hint 54). The convenience sampling is ___________ Simple Easy Convenient All of the above Hint 55). The cluster sampling categorized into __________ One Two Three Four Hint 56). The two-stage cluster sampling categorized into __________ One Two Three Four Hint 57). The quota sampling is _________ Simple Easy Convenient All of the above Hint 58). The random sampling is categorized into __________ One Two Three Four Hint 59). How many types of transmission techniques are there? One Two Three Four Hint 60). In how many ways the AM wave can represent? One Two Three Four Hint 61). In _________, the modulation takes place at high level modulation High-level modulation Low-level modulation Both a and b None of the above Hint 62). Which class amplifier is used in high-level modulation? A B C AB Hint 63). ___________ modulation is used in high power broadcast High-level modulation Low-level modulation Both a and b None of the above Hint 64). The low-level modulation used in _________ Walkie-talkie TV transmitters In laboratory equipment All of the above Hint 65). The efficiency is low in _________ modulation High-level modulation Low-level modulation Both a and b None of the above Hint 66). The efficiency is high-level modulation is __________ High Very High Low Very low Hint 67). The PAM is categorized into ____________ One Two Three Four Hint 68). In PAM __________ Both demodulation and modulation is simple Construction of receiver and transmitter circuits is easy Both a and b None of the above Hint Read more about PAM 69). The disadvantages of PAM is ___________ Requires large bandwidth Noise is more Power required is less All of the above Hint 70). The PAM used in __________ Ethernet communication Photo-biology Both a and b None of the above Hint 71).The advantages of PTM are _____________ Consumes low power Efficiency is about 90% Noise interference is less All of the above Hint 72). The disadvantages of PTM are ________ Circuit is more complex System is expensive Both a and b None of the above Hint 73).The PTM used in __________ amplifiers Audio Video Both a and b None of the above Hint 74). In PPM _____________ Noise interference is less Requires less power compared to PAM Both a and b None of the above Hint 75). The system in PPM is _________ Complex Requires more bandwidth Both a and b None of the above Hint Sampling Theory and Pulse Modulation MCQs for Quiz 76). The pulse position modulation used in ___________ Remote controlled cars Telecommunication systems Air traffic control system All of the above Hint 77). The pulse code modulation used in ___________ Telephony Space communication system Satellite communication system All of the above Hint 78). The pulse width modulation signal has ___________ voltage levels One Two Three Four Hint 79). The non-sampling errors are categorized into ___________ One Two Three Four Hint 80). The ascertainment errors categorized into ___________ One Two Three Four Hint 81). In _________ modulation, there is no feedback in receiver or transmitter Pulse Delta Adaptive delta None of the above Hint 82). The number of bits used for the sample in PCM is ______ 4 8 16 4/8/16 Hint 83). The step size in pulse code modulation is _________ Fixed Variable Fixed or variable None of the above Hint 84). The step size in differential pulse code modulation is _________ Fixed Variable Fixed or variable None of the above Hint 85). The sampling performed in __________ ways One Two Three Four Hint 86). The natural sampling and flat-top sampling are two types of _______ PAM PWM PPM None of the above Hint 87). The advantages of DPCM are ______________ Signaling rate is less Bandwidth is less Both a and b None of the above Hint 88). ____________ are the advantages of DM Signaling rate is low Channel Bandwidth is low Both a and b None of the above Hint 89). What are the disadvantages of DM? Slope overload present Granular noise present Both a and b None of the above Hint Read more about Delta Modulation 90). The advantages of adaptive delta modulation are __________ Improved SNR Reduction in granular noise and slope overload Low signaling rate All of the above Hint 91). ____________ are the two major noise sources in PAM systems Channel noise Quantization noise Both a and b None of the above Hint 92). ___________ modulation is similar to AM PAM PCM PPM PWM Hint 93). ___________ modulation is similar to FM PAM PCM PPM PWM Hint Read more about Frequency Modulation 94). ___________ modulation is similar to PM PAM PCM PPM PWM Hint 95). The PAM is classified into ____________ One Two Three Four Hint 96). The quantization error is categorized into __________ One Two Three Four Hint 97). The distortions present in delta modulation are _________ Slope overload Granular noise Both a and b None of the above Hint 98). What is the standard form of PDM? Pulse Delta Modulation Phase Duration Modulation Pulse Distortion Modulation None of the above Hint 99). The sampling methods are of __________ types One Two Three Four Hint 100). __________ modulation is also known as PWM PAM PCM PPM dPDM Hint Time is Up! Time's up
