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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 _______
HintThe modulation is classified into two types they are continuous wave modulation and pulse modulation
2). _____________ are continuous wave modulations?
HintBoth amplitude and angle modulations are continuous wave modulation
3). _____________ are pulse-type modulations?
HintBoth analog and digital modulations are pulse-type modulations
4). _____________ are type of angle modulation
HintBoth frequency and phase modulations are types of angle modulation
5). ___________ are type of analog modulation
HintBoth PAM and PTM are types of analog modulation
6). Pulse width modulation is a type of _________ modulation
HintPulse width modulation is a type of analog modulation
7). Pulse code modulation is a type of _________ modulation
HintPulse code modulation is a type of digital modulation
8). In _______ modulation, the carrier waves are in the form of pulses
HintIn pulse modulation, the carrier waves are in the form of pulses
9). In _______ modulation, the carrier waves are in the form of continuous
HintIn continuous modulation, the carrier waves are in the form of continuous
10). The pulse width modulation is a type of ________ modulation
HintThe pulse width modulation is a type of pulse time modulation
11). In _______ modulation, the carrier wave of the pulse varies on the time axis
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
HintIn pulse width modulation, the pulses of the carrier wave are varied according to the message signal
13). The pulse position modulation is a type of _________ modulation
HintThe pulse position modulation is a type of analog modulation
14). In _______ modulation, the pulses of the carrier wave are varied according to the message signal
HintIn pulse position modulation, the pulses of the carrier wave are varied according to the message signal
15). The sampling is divided into ______ types
HintThe sampling is divided into two types they are large sample test and small sample test
16). If the size of the sample is greater than or equal to thirty is called a ____________
HintIf the size of the sample is greater than or equal to thirty is called a large sample test
17). If the size of the sample is less than thirty is called a ____________
HintIf the size of the sample is less than thirty is called a small sample test
18). The sample standard deviation is represented by _________
HintThe sample standard deviation is represented by a letter S
19). The population mean is represented by _____________
HintThe population mean is represented by a symbol µ
20). The population standard deviation is represented by _____________
HintThe population standard deviation is represented by a symbol σ
21). The probability sampling is also known as ____________ sampling
HintProbability sampling is also known as a representative sampling
22). The non-probability sampling is also known as ____________ sampling
HintNon-probability sampling is also known as non-representative sampling
23). The non-probability sampling divided into ___________ types
HintThe non-probability sampling divided into four types they are quota sampling, convenience sampling, judgment sampling, and purposeful sampling
24). _____________ are the probability sampling techniques
HintSimple random sampling, systematic sampling, stratified, and cluster sampling are the probability sampling techniques
25). The strengths of the convenience sampling is ___________
HintThe strengths of the convenience sampling are Least time consuming, most convenient, and least expensive

Sampling Theory and Pulse Modulation MCQs for Exams

26). The strengths of the judgement sampling is ___________
HintThe judgment sampling is convenient, cost-effective, and it is not time-consuming
27). The cluster sampling is __________
HintThe cluster sampling is easy to implement and cost-effective
28). The strengths of the systematic sampling is ___________
HintThe strengths of the systematic sampling is easy to implement, the sampling frame is not necessary, and it can increase representativeness
29). The simple random sampling can be ____________
HintThe simple random sampling can be easily understood and the results are projectable
30). _________ error is a type of random error
HintSampling error is a type of random error
31). _________ error is a type of random or non-random error
HintNon-sampling error is a type of random or non-random error
32). The non-sampling error occurs in _________
HintThe non-sampling error occurs in both census and sample
33). The sampling error occurs in _________
HintThe sampling error occurs only in sample
34). The variable parameter of a pulsed carrier in PAM is __________
HintThe variable parameter of a pulsed carrier in the PAM is amplitude
35). The variable parameter of a pulsed carrier in PWM is __________
HintThe variable parameter of a pulsed carrier in the PWM is width
36). The variable parameter of a pulsed carrier in PPM is __________
HintThe variable parameter of a pulsed carrier in the PPM is position
37). The bandwidth requirement is high in _________
HintThe bandwidth requirement is high in both PPM and PWM
38). The bandwidth requirement is low in _________
HintThe bandwidth requirement is low in PAM
39). The noise immunity is low in _________
HintThe noise immunity is low in PAM
40). The noise immunity is high in _________
HintThe noise immunity is high in both PPM and PWM
41). The transmitted power in PAM varies with ________
HintThe transmitted power in PAM varies with the amplitude of pulses
42). The transmitted power in PWM varies with ________
HintThe transmitted power in PWM varies with variation in width
43). The transmitted power in PPM varies with ________
HintThe transmitted power in PPM remains constant
44). In PAM information contained in _________ variations
HintIn PAM information contained in amplitude variations
45). In PPM information contained in _________ variations
HintIn PPM information contained in position variations
46). The advantages of PPM are ________
HintIn PPM the noise immunity is good and it requires a constant transmitter power output
47). The disadvantages of PPM are ________
HintThe PPM requires large bandwidth and synchronization between receiver and transmitter
48). The PPM used for ____
HintThe PPM used for an optical communication system, military application, etc
49). The advantages of PWM are ___________
HintThe PWM is immune to noise and the synchronization between receiver and transmitter is not required
50). The digital pulse modulation categorized into __________
HintThe digital pulse modulation categorized into three types they are PCM, delta modulation, and adaptive delta modulation

Sampling Theory and Pulse Modulation Important MCQs

51). The pulse time modulation categorized into __________
HintThe pulse time modulation categorized into two types they are PWM and PPM
52). The analog pulse modulation categorized into __________
HintThe analog pulse modulation categorized into two types they are PTM and PAM
53). The stratified sampling categorized into __________
HintThe stratified sampling categorized into two types they are proportionate and disproportionate
54). The convenience sampling is ___________
HintConvenience sampling is simple, easy, and convenient
55). The cluster sampling categorized into __________
HintThe cluster sampling categorized into three types they are one-stage sampling, two-stage sampling, and multi-stage sampling
56). The two-stage cluster sampling categorized into __________
HintThe two-stage cluster sampling categorized into two types they are simple cluster sampling and probability proportionate to size sampling
57). The quota sampling is _________
HintThe quota sampling is simple, easy, and convenient
58). The random sampling is categorized into __________
HintRandom sampling is categorized into two types they are simple random sampling and stratified random sampling
59). How many types of transmission techniques are there?
HintThere are two types of transmission techniques are there they are baseband transmission and modulation transmission
60). In how many ways the AM wave can represent?
HintThe AM wave can represent in a time domain and frequency domain
61). In _________, the modulation takes place at high level modulation
HintIn high-level modulation, the modulation takes place at high-level modulation
62). Which class amplifier is used in high-level modulation?
HintClass C amplifier is used in high-level modulation
63). ___________ modulation is used in high power broadcast
HintHigh-level modulation is used in high power broadcast
64). The low-level modulation used in _________
HintThe low-level modulation used in walkie-talkie, tv transmitters, in laboratory equipments, etc
65). The efficiency is low in _________ modulation
HintThe efficiency is low in low-level modulation compared to high-level modulation
66). The efficiency is high-level modulation is __________
HintThe efficiency is high-level modulation is very high
67). The PAM is categorized into ____________
HintThe PAM is categorized into two types they are single polarity PAM and double polarity PAM
68). In PAM __________
HintIn PAM Both demodulation and modulation is simple and the construction of receiver and transmitter circuits is easy

Read more about PAM

69). The disadvantages of PAM is ___________
HintThe PAM requires large bandwidth, noise is more, and power required is less in PAM
70). The PAM used in __________
HintThe PAM used in ethernet communication, photo-biology, etc
71).The advantages of PTM are _____________
HintThe PTM consumes low power, the efficiency is about 90%, and the noise interference is less
72). The disadvantages of PTM are ________
HintIn PTM the circuit is more complex and the system is expensive
73).The PTM used in __________ amplifiers
HintThe PTM used in audio amplifiers
74). In PPM _____________
HintIn PPM the noise interference is less and it requires less power compared to PAM
75). The system in PPM is _________
HintThe system in PPM is complex and requires more bandwidth

Sampling Theory and Pulse Modulation MCQs for Quiz

76). The pulse position modulation used in ___________
HintThe pulse position modulation used in remote-controlled cars, telecommunication systems, air traffic control system, etc
77). The pulse code modulation used in ___________
HintThe pulse code modulation used in telephony, space communication system, satellite communication system, etc
78). The pulse width modulation signal has ___________ voltage levels
HintThe pulse width modulation signal has two voltage levels
79). The non-sampling errors are categorized into ___________
HintThe non-sampling errors are categorized into three types they are specification errors, ascertainment errors, and tabulation errors
80). The ascertainment errors categorized into ___________
HintThe ascertainment errors categorized into two types they are coverage errors and content errors
81). In _________ modulation, there is no feedback in receiver or transmitter
HintIn pulse modulation, there is no feedback in receiver or transmitter
82). The number of bits used for the sample in PCM is ______
HintThe number of bits used for the sample in PCM is 4/8/16
83). The step size in pulse code modulation is _________
HintThe step size in pulse code modulation is fixed or variable
84). The step size in differential pulse code modulation is _________
HintThe step size in differential pulse code modulation is fixed or variable
85). The sampling performed in __________ ways
HintThe sampling performed in two ways they are sampling with replacement and sampling without replacement
86). The natural sampling and flat-top sampling are two types of _______
HintNatural sampling and flat-top sampling are two types of pulse amplitude modulations
87). The advantages of DPCM are ______________
HintIn DPCM the signaling rate and bandwidth both are less
88). ____________ are the advantages of DM
HintIn delta modulation both signaling rate and channel bandwidth are low
89). What are the disadvantages of DM?
HintThe disadvantages of DM are both slope overload and granular noise is present
Read more about Delta Modulation
90). The advantages of adaptive delta modulation are __________
HintImproved SNR, reduction in granular noise and slope overload, low signaling rate are the advantages of adaptive delta modulation
91). ____________ are the two major noise sources in PAM systems
HintChannel noise and quantization noise are the two major noise sources in PAM systems
92). ___________ modulation is similar to AM
HintPulse amplitude modulation is similar to AM
93). ___________ modulation is similar to FM
HintPulse width modulation is similar to FM
Read more about Frequency Modulation
94). ___________ modulation is similar to PM
HintPulse position modulation is similar to PM
95). The PAM is classified into ____________
HintThe PAM is classified into two types they are natural and flat tope PAM
96). The quantization error is categorized into __________
HintThe quantization error is categorized into two types they are round off error and overload error
97). The distortions present in delta modulation are _________
HintThe distortions present in delta modulation are slope overload distortion and granular noise
98). What is the standard form of PDM?
HintThe standard form of PDM is Phase Duration Modulation
99). The sampling methods are of __________ types
HintThe sampling methods are of three types they are ideal, natural, and flattop samplings
100). __________ modulation is also known as PWM
HintPulse duration modulation is also known as PWM
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