Top 80+ Solved Signals and Systems MCQ Questions Answer
Q. A system which is linear is said to obey the rules of
a. scaling
b. additivity
c. both scaling and additivity
d. homogeneity
Q. A time invariant system is a system whose output
a. increases with a delay in input
b. decreases with a delay in input
c. remains same with a delay in input
d. vanishes with a delay in input
Q. Should real time instruments like oscilloscopes be time invariant?
a. yes
b. sometimes
c. never
d. they have no relation with time variance
Q. All real time systems concerned with the concept of causality are
a. non causal
b. causal
c. neither causal nor non causal
d. memoryless
Q. A system is said to be defined as non causal, when
a. the output at the present depends on the input at an earlier time
b. the output at the present does not depend on the factor of time at all
c. the output at the present depends on the input at the current time
d. the output at the present depends on the input at a time instant in the future
Q. When we take up design of systems, ideally how do we define the stability of a system?
a. a system is stable, if a bounded input gives a bounded output, for some values of the input
b. a system is unstable, if a bounded input gives a bounded output, for all values of the input
c. a system is stable, if a bounded input gives a bounded output, for all values of the input
d. a system is unstable, if a bounded input gives a bounded output, for some values of the input
Q. All causal systems must have the component of
a. memory
b. time invariance
c. stability
d. linearity
Q. What are fourier coefficients?
a. the terms that are present in a fourier series
b. the terms that are obtained through fourier series
c. the terms which consist of the fourier series along with their sine or cosine values
d. the terms which are of resemblance to fourier transform in a fourier series are called fourier series coefficients
Q. What is a line spectrum?
a. plot showing magnitudes of waveforms are called line spectrum
b. plot showing each of harmonic amplitudes in the wave is called line spectrum
c. plot showing each of harmonic amplitudes in the wave is called line spectrum
d. plot showing each of harmonic amplitudes called line spectrum
Q. What is the disadvantage of exponential Fourier series?
a. it is tough to calculate
b. it is not easily visualized
c. it cannot be easily visualized as sinusoids
d. it is hard for manipulation
Q. Fourier series uses which domain representation of signals?
a. time domain representation
b. frequency domain representation
c. both combined
d. neither depends on the situation