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 MULTIPLE CHOICE TEST DISCREET FOURIER TRANSFORM FAST FOURIER TRANSFORMS Pick the most appropriate answer.

Q1.  Given that W=e-i(2π/N) , where N=3. Then F=WN can be computed as F=

0

1

-1

e

Q2.  Given that W=e-i(2π/N) , where N=3. Then F=W(N/2) can be computed as F=

0

1

-1

e

Q3. Given that , . The values for vector  shown in

can be computed as:

Q4.  Given that , .  The values for  shown in Equation (22D)

can be computed as

Q5 If the forcing function F(t) is given as

.

Then, to avoid aliasing phenomenon, the minimum number of sample data points Nmin should be

8

16

24

32

Q6.  Based on the figure below, aliasing phenomena will not occur because there were

2 sample data points per cycle.

4 sample data points per cycle.

4 sample data points per 2 cycles.

6 sample data points per 2 cycles.

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