What is the wave of frequency that occurs at the sum and difference of the carrier and modulating signal is called?
a) Noise signals
b) Sideband c) Extraband d) Neutral band

What type of display will give us clear information on the signal if it is made up of different frequencies?
a) Frequency domain display
b) Amplitude domain display c) Time domain display d) Bandwidth display

What happens if a satellite is launched vertically and released at its design altitude?
a) Continue to orbit the earth
b) Fall back c) Overshoots the altitude and moves at a constant speed d) Stays where it was released

The satellite is accelerating as it orbits the earth.
a) True
b) False

Why does the orbit take the shape of an ellipse or circle?
a) Position can be easily determined
b) Consume less fuel c) Most efficient geometry d) Better coverage on earth

The direction of orbit in the same direction of earth rotation is called ______
a) Retrograde
b) Posigrade c) Perigee d) Apogee

When is the speed of the satellite maximum in an elliptical orbit?
a) Retrograde
b) Posigrade c) Perigee d) Apogee

The time period taken by the satellite to complete one orbit is called ________
a) Lapsed time
b) Time period c) Sidereal period d) Unit frequency

What is the angle of inclination for a satellite following an equatorial orbit?
a) 0°
b) 180° c) 45° d) 90

The angle between the line from the earth station’s antenna to the satellite and the line between the earth station’s antenna and the earth’s horizon is called as ___________
a) Angle of inclination
b) Angle of elevation c) Apogee angle d) LOS angle

Which of the following provides a buffer between the user and the low-level interfaces to the hardware?
a) operating system
b) kernel c) software d) hardware

Which of the following enables the user to utilise the system efficiently?
a) kernel
b) operating system c) software d) hardware

Which of the following can make the application program hardware independent?
a) software
b) application manager c) operating system d) kernel

Which forms the heart of the operating system?
a) kernel
b) applications c) hardware d) operating system

Which of the following bus can easily upgrade the system hardware?
a) control bus
b) data bus c) VMEbus d) bus interface unit

What are the main features of a receiver?
a) Synchronization
b) Multiple parallel receiver chain c) Synchronization & Multiple parallel receiver chain d) None of the mentioned

What conditions must be fulfilled in a good digital communication system?
a) High data rate
b) High fidelity c) Low transmit power d) All of the mentioned

Wired channels are
a) Lossy
b) Lossless c) Lossy & Lossless d) None of the mentioned

The equivalent temperature in a receiver design must be kept
a) Low
b) High c) Does not affect the receiver d) None of the mentioned

Which corrects the sampling time problem in a digital system?
a) Interpolator
b) Decimator c) Equalizer d) Filter

Transmission media used in low frequency band are
a) Air
b) Water c) Copper cable d) All of the mentioned