# Mobile Computing MCQs: Electronics Engineering Q&A

Mobile Computing MCQs. Electronics Engineering Mobile Computing MCQs for university tests and all kinds of exams and test preparations.

## Mobile Computing MCQs

The rainbow pattern seen on a CD is an example of ??

a. Reflection
b. Refraction
c. Diffraction
d. None of the above

PN sequence at the decoder acts as a locally generated carrier at the receiver and decodes the signal using ??

a. Correlator
c. Frequency divider
d. PLL

Fresnel Reflection Coefficient is a factor of ??

1. Polarization of the wave
2. Properties of the material at which reflection occurs
3. Angle of incidence of wave

a. 1 and 2 are correct
b. 1 and 3 are correct
c. All the three are correct
d. 2 and 3 are correct

1. PN sequence for modulation
2. Large bandwidth
3. Multiple users

a. 1 and 2 are correct
b. 1 and 3 are correct
c. 2 and 3 are correct
d. All the three are correct

### MCQs In Engineering

When a wave falls on a perfect conductor ??

a. Wave is partially reflected and partially transmitted
b. All incident energy is reflected back without loss of energy
c. Part of energy gets absorbed
d. Both a and c

EIRP is ??

2. Maximum radiated power available by the transmitter
3. A factor of power and gain of transmitter

a. 1 and 2 are correct
b. 1 and 3 are correct
c. All the three are correct
d. 2 and 3 are correct

Brewster angle is the angle at which ??

a. No reflection occurs at the first medium
b. The reflection coefficient is zero
c. The wave gets refracted in the direction of source
d. Both a and b
e. Both a and c

According to Friis free space equation ??

1. Received power falls with the square of the distance between the transmitter and receiver
2. Increases with the square of the distance between the transmitter and receiver
3. Received power increases with gains of transmitting and receiving antennas

a. 1 and 2 are correct
b. 1 and 3 are correct
c. All the three are correct
d. 2 and 3 are correct

Mobile Computing MCQs

Fading is caused due to ??

1. Multi path propagation
2. Obstacles
3. Frequency variations at the source
4. Variation in amplitude and phase at receiver

a. 1 and 2 are correct
b. 1, 2, and 4 are correct
c. 2 and 3 are correct
d. All are correct

The free space model of propagation refers to ??

1. Unobstructed line of sight between the transmitter and receiver
3. Propagation along the ground surface

a. 1 and 2 are correct
b. 1 and 3 are correct
c. 2 and 3 are correct
d. All the three are correct

Coherence time refers to ??

a. Time required to attain a call with the busy base station
b. Time required for synchronization between the transmitter and the receiver
c. Minimum time for a change in magnitude and phase of the channel
d. None of the above

Friis free space equation ??

1. Is an expression for noise power
2. Is a function of transmitting and receiving antenna gain
3. Depends upon the distance between transmitting and receiving antenna

a. 1 and 2 are correct
b. 1 and 3 are correct
c. 2 and 3 are correct
d. All are correct

Mobile Computing MCQs

a. Fading due to large obstructions
b. The large coherence time of the channel as compared to the delay constraints
c. The small coherence time of the channel as compared to the delay constraints
d. Both a and b
e. Both a and c

a. Signal fading due to Doppler shift in the channel
b. Temporary failure of message transfer
c. Large coherence time of the channel as compared to the delay constraints
d. All of the above

1. Strong destructive interference
2. Drop in signal to noise ratio
3. Temporary failure of message transfer

a. 1 and 2 are correct
b. 1 and 3 are correct
c. 2 and 3 are correct
d. All are correct