Choose the correct answer (10 Marks)

1. Telegraph signals are examples of

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

2. DTFT is the representation of

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

3. Frequency selectivity characteristics of DFT refersto

a. Ability to resolve different frequency componentsfrom input signal b. Ability to translate into frequency domain c.Ability to convert into discrete signal d. None of theabove

4. FFT may be used to calculate

a. DFT b. Laplace transforms c. Direct Z transform d. Indirect Z transform

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

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

6. The IIR filter designing involves

a. Designing of analog filter in analog domain andtransforming into digital domain b. Designing of analog filter indigital domain and transforming into analog domain c. Designing ofdigital filter in digital domain and transforming into analogdomain d. Designing of digital filter in analog domain andtransforming into digital domain

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

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

8. The interface between an analog signaland

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

9. The discrete impulse function is definedby

a. ?(n) = 1, n ? 0 , n ? 1 b. ?(n) = 1, n ? 0, n ? 1 c.?(n) = 1, n ? 0, n ? 1 d. ?(n) = 1, n = 0, n ? 1x 10. If a signalx(n) is passed through a system to get an output signal ofy(n)=x(n+1), then the signal is said to be a. Delayed b. Nooperation c. None of the mentioned d. Advanced

10. If a signal x(n) is passed through a system to getan 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 rating: 100% (QA)

1 b Analog signals 2 a Aperiodic Discrete time signals 3 a Ability to resolve different frequency components from input signal 4 a DFT 5 a Both conver... View the full answer