Exercise: Signals And Systems

Questions for: Signals And Systems

ROC of sequence x[n] = δ[n] is
A:
Not exist
B:
z = 0
C:
Entire Plane
D:
Entire Plane expect z = 0, z = ∞
Answer: C
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A signal m(t) with bandwidth 500 Hz is first multiplied by a signal g(t) where

The resulting signal is then passed through on ideal low pass filter with bandwidth 1 kHz. The output of the low pass filter would me
A:
δ(t)
B:
m(t)
C:
0
D:
m(t) δ(t)
Answer: B
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If p is the probability of success and q is the probability of failure, then the probability that there are r successes in n trails is
A:
ncr pr qn - r
B:
ncr pn - r qr
C:
ncr pr qn + r
D:
ncr pn qn - r
Answer: A
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Let f1(t) = G1(t) + 4, f2(t) = G2(t) + 3. If G1(t) and G2(t) are uncorrected then the correlation between f1(t) and f2(t) are
A:
12
B:
7
C:
6
D:
zero
Answer: D
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The inverse Fourier transform of the function F(ω) = is
A:
sin ωt
B:
cos ωt
C:
sgnt
D:
u(t)
Answer: C
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