Question

Choose the correct answer

1. Telegraph signals are examples of

a. Digital signals b. Analog signals c. Impulse signals d. Pulse train

2. DTFT is the representation of

a. Aperiodic Discrete time signals b. Periodic Discrete time signals c. Aperiodic continuous signals d. Periodic continuous signals

3. Frequency selectivity characteristics of DFT refers to

a. Ability to resolve different frequency components from input signal b. Ability to translate into frequency domain c. Ability to convert into discrete signal d. None of the above

4. FFT may be used to calculate

a. DFT b. Laplace transforms c. Direct Z transform d. In direct Z transform

5. The similarity between the Fourier transform and the z transform is that

a. Both convert discrete time domain to frequency spectrum domain b. Both convert frequency spectrum domain to discrete time domain c. Both convert analog signal to digital signal d. Both convert digital signal to analog signal

6. The IIR filter designing involves

a. Designing of analog filter in analog domain and transforming into digital domain b. Designing of analog filter in digital domain and transforming into analog domain c. Designing of digital filter in digital domain and transforming into analog domain d. Designing of digital filter in analog domain and transforming into digital domain

7. Which among the following represent/s the characteristic/s of an ideal filter?

a. Constant gain in passband b. Zero gain in stop band c. Linear Phase Response d. All of the above

8. The interface between an analog signal and

a. D/A converter b. Modulator c. Demodulator d. A/D converter

9. The discrete impulse function is defined by

a. δ(n) = 1, n ≥ 0 , n ≠ 1 b. δ(n) = 1, n ≤ 0, n ≠ 1 c. δ(n) = 1, n ≤ 0, n ≥ 1 d. δ(n) = 1, n = 0, n ≠ 1x 10. If a signal x(n) is passed through a system to get an output signal of y(n)=x(n+1), then the signal is said to be a. Delayed b. No operation c. None of the mentioned d. Advanced

10. If a signal x(n) is passed through a system to get an output signal of y(n)=x(n+1), then
the signal is said to be
a. Delayed b. No operation c. None of the mentioned d. Advanced

Answer 1

The answers are as follows:

1. Telegraph signals are examples of (a) Digital signals

2. DTFT is the representation of(a)Aperiodic Discrete time signals

3. Frequency selectivity characteristics of DFT refers to (a)Ability to resolve different frequency components from input signal

4. FFT may be used to calculate (a) DFT

5.The similarity between the Fourier transform and the z transform is that (a) Both convert discrete time domain to frequency spectrum domain

6.The IIR filter designing involves (d) Designing of digital filter in analog domain and transforming into digital domain

7.Which among the following represent/s the characteristic/s of an ideal filter (d) All of the above

8.The interface between an analog signal and didgital processor is (d) A/D converter

9. The discrete impulse function is defined by (d) δ(n) = 1, n = 0, n ≠ 1

10. If a signal x(n) is passed through a system to get an output signal of y(n)=x(n+1), then
the signal is said to be (d) Advanced