1. Satellite communication takes place in
a) Ultra high frequency band
b) Super high frequency band
c) Ultra & Super high frequency band
d) None of the mentioned
Explanation: Satellite communication takes place in ultra high and super high frequency bands
2. The weighing matrix is
a) Positive quantity
b) Inverse of covariance matrix of the input vector
c) Positive quantity & Inverse of a covariance matrix of the input vector
d) None of the mentioned
Explanation: W is a positive definite weighing matrix and it is inverse of covariance matrix of the input vector.
3. Non uniform tree _____ bit rate.
a) Increases
b) Decreases
c) Does not affect
d) None of the mentioned
Explanation: Non uniform tree for binary search increases the bit rate
4. Two clock with rates T1 and T2 are incommensurate if its ratio is
a) Rational
b) Irrational
c) Equal
d) None of the mentioned
Explanation: Two clock with rates T1 and T2 are incommensurate if its ratio is irrational.
5. Possible timing error detection methods are
a) Early late
b) Zero crossing
c) Early late & Zero crossing
d) None of the mentioned
Explanation: Methods for timing error detections are early late timing error detection and zero crossing timing error detection method.
6. Which has minimum power loss during transmission?
a) Twisted Copper cable at 1KHz
b) Optical fiber
c) Twisted copper cable at 100KHz
d) Wave guide
Explanation: Twisted copper wire at 1KHz have low power loss.
7. Voltage generated by lightning is an example for
a) Energy signal
b) Power signal
c) Energy & Power signal
d) None of the mentioned
Explanation: Voltage generated by lightning is an example for energy signal and it has very high power
8. The sampling process includes methods such as
a) Filtering
b) Sample and hold
c) Amplifying
d) None of the mentioned
Explanation: The analog data is converted to digital data through sampling. Sampling is done using sample and hold mechanism which uses transistor, capacitor or shutter etc
9. The output of sampling process are called as ________
a) Pulse code modulation
b) Pulse amplitude modulation
c) Frequency modulation
d) Amplitude modulation
Explanation: In sampling process, input data is split up into samples whose output samples are called as pulse amplitude modulation as the amplitude of the samples is derived from the input waveform
10. According to Sampling theorem
a) Ts is greater than 1/2fm
b) Ts is lesser than 1/2fm
c) Ts is equal to 1/2fm
d) Ts is lesser than or equal to 1/2fm
Explanation: By sampling theorem the input can be derived from the output samples if Ts is lesser than or equal to 1/2fm