a. Sine waves

b. Cosine waves

c. Triangular waves

d. Square waves

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**ANSWER: b. cosine waves **

a. Possess an odd & even symmetry respectively

b. Possess an even & odd symmetry respectively

c. Both possess an odd symmetry

d. Both possess an even symmetry

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**ANSWER: a. possess an odd & even symmetry respectively **

x(t) = a

a. DC component

b. Fundamental component

c. Second harmonic component

d. All of the above

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**ANSWER: a. DC component **

a. Continuous in nature

b. Discrete in nature

c. Sampled in nature

d. All of the above

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**ANSWER: b. Discrete in nature**

a. Trigonometric Fourier Series

b. Polar Fourier Series

c. Exponential Fourier Series

d. All of the above

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**ANSWER: c. Exponential Fourier Series **

a. Number of digital pulses transmitted per second

b. Number of digital pulses transmitted per minute

c. Number of digital pulses received per second

d. Number of digital pulses received per minute

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**ANSWER: a. Number of digital pulses transmitted per second **

a. Width of each pulse increases

b. Width of each pulse decreases

c. Width of each pulse remains unaffected

d. None of the above

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**ANSWER: b. Width of each pulse decreases **

a. Compression in time domain

b. Expansion in time domain

c. Compression in frequency domain

d. Expansion in frequency domain

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**ANSWER: d. Expansion in frequency domain **

a. To change the symmetry of the phase spectrum

b. To maintain the symmetry of the phase spectrum

c. Both a & b

d. None of the above

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**ANSWER: b. To maintain the symmetry of the phase spectrum **

a. Shape of signal in time domain & shape of spectrum can be interchangeable

b. Shape of signal in frequency domain & shape of spectrum can be interchangeable

c. Shape of signal in time domain & shape of spectrum can never be interchangeable

d. Shape of signal in time domain & shape of spectrum can never be interchangeable

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**ANSWER: a. Shape of signal in time domain & shape of spectrum can be interchangeable **

a. Time Scaling

b. Linearity

c. Time Shifting

d. Duality

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**ANSWER: c. Time Shifting **

A : Inverse relationship exists between the time and frequency domain representation of signal

B : A signal must be necessarily limited in time as well as frequency domains

a. A is true & B is false

b. A is false & B is true

c. Both A & B are true

d. Both A & B are false

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**ANSWER: a. A is true & B is false **

a. Amplitude Response should be constant for all frequencies

b. Phase should be linear with frequency passing through zero

c. Both a & b

d. None of the above

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**ANSWER: c. Both a & b **

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