• Home
  • Articles
  • Basics
  • Components
  • Projects
  • Communications
  • MCQ

WatElectronics.com

You are here: Home / MCQ / Signals and Systems Question & Answers

Signals and Systems Question & Answers

June 5, 2021 By WatElectronics

This article lists 100+ Signals and Systems MCQs for engineering students. All the Signals and Systems Questions & Answers given below includes solution and link wherever possible to the relevant topic.

A signal is a time-variant and a physical phenomenon. The main intention of the signal is to convey information like the human voice, the voltage on telephone wires, electrical signals, etc. Noise is also a signal but it carries unwanted information.

A system is a device or group of devices that do operations on signals. The system may have one or more inputs and outputs. The inputs of the system are always excitation and the outputs of the system are always the response. If two or more inputs and two or more outputs are given to the system then that system is called the MIMO system.

In three ways the discrete-time signals are represented are functional, tabular method of representation, and sequence representation. In a memory-less system, the value of the present output depends on the present input. The dynamic system consists of delay elements, differentiation, integration, in their equation.

In a memory system, the value of the present output depends on past/future input. The step function, impulse function, and ramp function are the elementary signals. The speech signal is the example of a one-dimensional signal, image is an example of the multi-dimensional signal. The system is said to be linear if it satisfies the scaling and additivity properties. If distinct inputs lead to distinct outputs then the system is said to be invertible.

1). The impulse function is denoted by _______

Hint
2). The impulse function is _______ when t=0

Hint
3). Whenever the amplitude of step function is equivalent to one then that is ______ signal

Hint
4). When t≥0, the unit signal amplitude must be ________

Hint
5). When t<0, the unit signal amplitude must be ________

Hint
6). The discrete-time always indicated with n

Hint
7). Whenever the amplitude of step function is more than one then that is called as ___________ signal

Hint
8). The continuous-time always indicated with t

Hint
9). How many inputs does the system have?

Hint
10). Signal is a _________

Hint
11). ________ are the examples of signal

Hint
12). The inputs of the system are called _____

Hint
13). In a ______ signal, we can define the value of the signal at any instant of time?

Hint
14). In a _________ signal, we can’t define the value of the signal at any instant of time?

Hint
15). Time scaling won’t work for the ____________ function

Hint
16). The impulse function is _______ when t≠0

Hint
17). When n=k, δ(n-k) is _______

Hint
18). When n≠k, δ(n-k) is _______

Hint
19). The signum function denoted with ______

Hint
20). How many outputs does the system have?

Hint
21). The outputs of the system are called ________

Hint
22). A __________ is an example of the system

Hint
23). The standard form of LTI is ___________ Time-Invariant System

Hint
24). The unit step signal is denoted with _______

Hint
25). ________ are the properties of impulse function

Hint

Signals and Systems MCQs with Hints

26). The sgn(t) is equal to one when ______

Hint
27). The relation between u(t) and sgn() is _______

Hint
28). The unit ramp signal denoted by ________

Hint
29). The r(t)=t when __________

Hint
30). The r(t)=0 when __________

Hint
31). The unit parabolic signal is zero when _________

Hint
32). x(t)=A rect (t/T) is a representation of ________

Hint
33). The sgn(t) is equal to zero when ________

Hint
34). The sinc function denoted with _________

Hint
35). The sampling function denoted with _________

Hint
36). Which one is a normalized function?

Hint
37). The operation on signals perform only on ________

Hint
38). The sgn(t) is equal to -1 when ___________

Hint
39). ______ operations performed on amplitude

Hint
40). ______ operations performed on time

Hint
41). For a discrete-time signals time is ______

Hint
42). For a discrete-time signals amplitude is ______

Hint
43). Which one is not a normalized function?

Hint
44). For discrete-time signals, both amplitude and time are ____

Hint
45). The signal is said to be _______whenever we can define a signal at an instant of time

Hint
46). The signal is said to be _______whenever there is un-certainty at any particular instant of time

Hint
47). The signal is said to be even when it satisfies the condition _______

Hint
48). The sum of two or more even functions, a product of two or more even functions o product of even number and odd functions results ______ function

Hint
49). A signal said to be periodic if it satisfies the condition _________

Hint
50). The smallest value of T which satisfies the ___________ condition is called the fundamental time period

Hint

Signals and Systems MCQs for Students

51). When two periodic sinusoids added then the result is ________

Hint
52). The signal is said to be odd when it satisfies the condition _____________

Hint
53). The sum of two or more odd functions or product of the odd number of odd functions results in ______ function

Hint
54). _______ methods are used to find whether the signal is periodic or not

Hint
55). A signal is said to be a power/energy signal if the total energy/power transmitted is ________

Hint
56). ________ system satisfies the superposition principle

Hint
57). The system is said to be __________ if its input, output characteristics changes with time

Hint
58). The condition for time variance is _____

Hint
59). The system is said to be _______ when it satisfies with linearity and time-variant

Hint
60). ________ system is a memory less system

Hint
61). A system is said to be _____ if its response is dependent upon the present and past inputs and doesn’t depend upon future input

Hint
62). All non-causal systems are _________

Hint
63). All static systems are _____________

Hint
64). A system said to be _______ when it produces bounded output for a bounded input

Hint
65). The impulse response of a system can be represented with _______

Hint
66). All finite duration signals with finite amplitude are said to be ______ signal

Hint
67). All periodic signals are _________ signals

Hint
68). The continuous impulse is a ________ signal

Hint
69). A discrete signal x(n) is said to be periodic when _______

Hint
70). _____ system is a memory system

Hint
71). In _______ system, the output depends upon future input also

Hint
72). The system is said to be _____ when it produces unbounded output for a bounded input

Hint
73). By using __________ we can find the zero state response of the system

Hint
74). The convolution is a mathematical operation that express _________ relation of an LTI system

Hint
75). _______ are the properties of convolution

Hint

Signals and Systems MCQs for Interviews

76). The convolution with impulse property states that ________

Hint
77). When input signals are scaled by α then the output will be _________

Hint
78). ______ are the conditions of Dirichlet

Hint
79). If x(n) is real and even signal then Fourier series coefficient will be ________

Hint
80). If the signal that we want to represent in terms of Fourier series is real and even then the fourier series coefficient will be _______

Hint
81). If the signal that we want to represent in terms of Fourier series is real and odd then the Fourier series coefficient will be _______

Hint
82). If the signal that we want to represent in terms of Fourier series is imaginary and even then the Fourier series coefficient will be _______

Hint
83). If the signal that we want to represent in terms of Fourier series is imaginary and odd then the Fourier series coefficient will be _______

Hint
84). The example of real and even signal is _________

Hint
85). The example of real and odd signal is _________

Hint
86). The example of imaginary and even signal is _________

Hint
87). The region of convergence _______

Hint
88). A signal x(t) and its Hilbert transform is having _________

Hint
89). How many types of correlations are there?

Hint
90). _______________ function gives measure of match or similarity or coherence between a signal and its time shifted version

Hint
91). _______________ is the measure of similarity between one signal and the time delayed version of other signal

Hint
92). What is the ROC of δ(n)?

Hint
93). What is the ROC of z-transform of δ(n+1)?

Hint
94). The analysis of discrete-time LTI system is _____________

Hint
95). ________ sampling works based on the multiplication

Hint
96). The noise interference in ideal sampling is ________

Hint
97). The sampling theory is a process to convert ___________

Hint
98). How many types of samplings are there?

Hint

Read more about Sampling

99). Auto-correlation function of the power signal is maximum at the origin so we can say that _____

Hint
100). __________ sampling works based on chopping

Hint

Signals and Systems MCQs for Quiz

101). The noise interference in natural sampling is _______

Hint
102). If there is no similarity between x(t) and x(t-τ) then autocorrelation will be _______

Hint
103). If a sequence is purely right-sided sequence or causal then region of convergence is entire z-plane except at __________

Hint
104). If a sequence is purely left-sided sequence or anti-causal then region of convergence is entire z-plane except at __________

Hint
105). For a two-sided sequence region of convergence is entire z-plane except at __________

Hint
106). The z-transform for discrete impulse function δ(n) is equivalent to one, for this type of impulse function the region of convergence is entire z-plane ____________

Hint
107). The z-transform for discrete impulse function δ(n+1) is equivalent to z, for this type of impulse function the region of convergence is entire z-plane ____________

Hint
108). The ROC in z-transform indicated as ___________

Hint
109). The z-transform of a discrete-time signal x(n) is represented by _________

Hint
110). _____ sampling works based on a sample and hold

Hint
111). The noise interference in flat top sampling is ______

Hint
112). The ZT and DTFT are equal when r is equal to __________

Hint
113). The ROC is the entire Z-plane for ________ sequence

Hint
114). The z-transform of u(-n) is _______

Hint
115). The white noise spectral density is _____

Hint
116). The frequency-domain representation of time-domain u(t) is __________

Hint
117). The time-domain representation of frequency domain δ(ω) is ______

Hint
118). The state is the group of_________ , which summarizes the history of the system to predict the future values

Hint
119). The smallest set of variables that determines the state of the system are known as ______

Hint
120). _______ is the vector that contains the state variables as elements

Hint
121). The advantages of state-space analysis are ______

Hint
122). The disadvantages of state-space analysis are ______

Hint
123). Which signal is used for processing digital signals?

Hint
124). The variable of the continuous-time denoted by _______

Hint
125). The variable of the discrete-time denoted by _______

Hint

Signals and Systems MCQs for Exams

126). ____________ is the process of reconstruction from its sampled output

Hint
127). The nquist rate of sin4000πt is _____

Hint
128). The maximum frequency of sin4000πt is _____

Hint
129). The nquist rate of sin200πt is _____

Hint
130). The nquist rate of sin(400t)*sinc(600t) is _____

Hint
131). A ________ is a frequency selective network

Hint
132). An LTI system acts as a _______

Hint
133). The nquist rate of cos(2000πt)*sin(6000πt) is _____

Hint
134). Filters allow transmission of signals in a __________________

Hint
135). Whichever the frequencies is allowed by the LTI system or the filter is called _________

Hint
136). In _______ band, a certain band of frequencies are is allowed and rest of the frequencies are allowed by the filter

Hint
137). How many types of filters are there?

Hint

Read more about Filters

138). The nyquist rate of sinc(200t)*sinc(600t) is _____

Hint
139). The change of input signals shape when it is transmitted through a system is called _________

Hint
140). If one input and one output is given to the system then that system is called ______

Hint
141). The ratio of Fourier transform of the output signal to the Fourier transform of the input signal is called ____________

Hint
142). If two or more inputs and two or more outputs are given to the system then that system is called ______

Hint
143). The maximum frequency of sinc(200t)*sinc(600t) is _____

Hint
144). Which one is a transformation technique?

Hint
145). The Fourier series, and Fourier transform is given by a french mathematician John Batiste Joseph Fourier in _________

Hint

Read more about Fourier Series and Fourier Transform

146). The periodic signals ________ time signals

Hint
147). How many types of Fourier transforms are there?

Hint
148). The nyquist rate of sinc(400t)*sinc(600t) is _____

Hint
149). How many types of Fourier series are there?

Hint
150). Which transform is only for a continuous-time?

Hint

Signals and Systems MCQs with Answers

151). Which transform is only for a discrete-time?

Hint
152). _________ are for the analysis purpose

Hint
153). _________ transforms are for the design purpose

Hint
154). The number of cycles per second is a ________

Hint
155). How much time taken by the signal is called the _____________

Hint
156). In T seconds one cycle has finished and in one second how many cycles has finished means _____

Hint
157). _________ is also used to calculate the power and phase constant of a particular harmonic present in the expansion

Hint
158). There are _______ Fourier series methods

Hint
159). The system output y(t)=x(t),if t=0 then the output is dependent on _______

Hint
160). The system output y(t)=x(t-1),if t=0 then the output is dependent on _______

Hint
161). The system output y(t)=x(t+1),if t=0 then the output is dependent on _______

Hint
162). The power of energy signals is equivalent to _______

Hint
163). The energy of power signals is equivalent to _______

Hint
164). The real and complex exponential signal can be defined in __________

Hint
165). __________ are the examples of systems

Hint
166). If f(t)=f(t+T) then the signal is ________

Hint
167). If f(t)=f(-t) then the signal is said to be ________

Hint
168). Interconnection patterns are of _________ types

Hint
169). __________ is an example of an invertible system

Hint
170). If distinct inputs lead to distinct outputs then the system is said to be ___________

Hint
171). The system is said to be linear if it satisfies the ________ properties

Hint
172). The speech signal is the example of ___________ dimensional signal

Hint
173). ______ is an example of multi-dimensional signal

Hint
174). Which signal has infinite duration?

Hint
175). _____ are the elementary signals

Hint

Signals and Systems MCQs for Engineers

176). Which one is an example of causal systems?

Hint
177). In ________ system the value of the present output depends on past/future input

Hint
178). ______ system consists of delay elements, differentiation, integration, in their equation

Hint
179). Which one is an example of a non-causal system?

Hint
180). In ________ system the value of the present output depends on present input

Hint
181). The sampling rate of telephony is around _______

Hint
182). The bandwidth of telephony is around _______

Hint
183). The bit rate of telephony is around _______

Hint
184). The sampling rate of high fidelity music is around _______

Hint
185). The bandwidth of high fidelity music is around _______

Hint
186). The standard audio rate of compact rate is around _________

Hint
187). The standard audio rate of a DVD system is around _________

Hint
188). The data rate of FM radio is ______

Hint
189). The frequency band of FM radio is between _____

Hint
190). The sampling rate of AM radio is around _______

Hint
191). The data rate depends on ________

Hint
192). The average frequency of human voices is _________

Hint
193). How many ways are there to represent discrete-time signals?

Hint
194). Which system doesn’t have feedback?

Hint
195). Which one is an example of a recursive system?

Hint
196). Which one is an example of a non-recursive system?

Hint
clock.png

Time is Up!

clock.png

Time's up

Recent Posts

  • IRF840 MOSFET : Pin Configuration, Specifications, Circuit & Its Applications
  • 2N5457 N-channel JFET : Pin Configuration, Specifications, Circuit & Its Applications
  • FDV301N MOSFET: Pin Configuration, Specifications, Circuit & Its Applications
  • MCP3008 ADC : Pin Configuration, Specifications, Interfacing & Its Applications
  • MSP430 Launchpad : Pin Configuration, Features, Interfacing & Its Applications
  • HC-06 Bluetooth Module : Pin Configuration, Set up, Interfacing & Its Applications
  • DS3231 RTC Module : Pin Configuration, Specifications, Interfacing with Microcontroller & Its Applications
  • IRF3205 MOSFET : Pin Configuration, Specifications, Circuit & Its Applications
  • Allen Bradley PLC : Architecture, Working, Types & Its Applications
  • Pentium Processor : Architecture, Working, Vs Pentium Pro, & Its Applications
  • Preamplifier : Circuit, Working, Types, Differences & Its Applications
  • Occupancy Sensor : Working, Circuit, Types & Its Applications

Categories

  • Articles (20)
  • Basics (112)
  • Communications (53)
  • Components (58)
  • Digital Electronics (41)
  • Digital Signalling (3)
  • Electronics (197)
  • Embedded Systems (11)
  • Magnetism (5)
  • Microprocessors (3)
  • Modulation (1)
  • Projects (15)

Subscribe to Our Newsletter

Don’t miss these articles!

We don’t spam! Read our privacy policy for more info.

Check your inbox or spam folder to confirm your subscription.

Category

  • Electronics
  • Components
  • Digital Electronics
  • Embedded Systems
  • Projects

Copyright © 2021 · WatElectronics.com | Contact Us | Privacy Policy