Free Printable DSP

1.

What is the ROC of the signal x(n)=δ(n-k), k>0?

a)

z=0

b)

z=∞

c)

Entire z-plane, except at z=0

d)

Entire z-plane, except at z=∞

2.

The power of a signal x[n] is defined as:

a)

$P=\lim_{N\rightarrow\infty\ }\ \frac{1}{1+2N}\sum_{n=-N}^N\left|x\left(n\right)\right|^2$

b)

$P=\lim_{N\rightarrow\infty}\ \frac{1}{1-2N}\sum_{n=-N}^N\left|x\left[n\right]\right|^2$

c)

$P=\lim_{N\rightarrow0}\ \frac{1}{1-2N}\sum_{n=-N}^N\left|x\left[n\right]\right|^2$

d)

$P=\lim_{N\rightarrow n}\ \frac{1}{2N+1}\sum_{-N}^N\left|x\left[n^2\right]\right|$

3.

Find the Z-transform of x(n)={1,2,3,4,2}. consider x(0)=3

a)

Z²+2Z+3+4Z^-1+Z^-2

b)

Z²+4Z+3+2Z^-1+Z^-2

c)

Z²+2Z+3+4Z^-1+2Z^-2

d)

Z²+2Z+1+Z^-1+Z^-2

4.

x(t)=cos(200Πt) what is the maximum frequency?

a)

50Hz

b)

100Hz

c)

200Hz

d)

400Hz

5.

The given signal x(t)=sin(10∏t) is periodic. what is the period?

a)

1/5 sec

b)

5sec

c)

10sec

d)

1/10sec

6.

What is the angular frequency and unit of f(t)=3sin(50t) ?

a)

50 radian/sec

b)

100 radian/sec

c)

25 radian/sec

d)

None

7.

The interface between an analog signal and a digital processor is

a)

D/A converter

b)

A/D converter

c)

Modulator

d)

Demodulator

8.

Any physical phenomenon that carries some information is

a)

System

b)

Processor

c)

Signal

d)

None

9.

The ROC of z-transform of any signal cannot contain poles.

a)

True

b)

False

10.

What is the set of all values of z for which X(z) attains a finite value?

a)

a) Radius of convergence

b)

b) Radius of divergence

c)

c) Feasible solution

d)

d) None of the mentioned

DSP

Total questions: 10

Worksheet time: 5mins

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