Digital and Satellite Communications MCQ Quiz in मल्याळम - Objective Question with Answer for Digital and Satellite Communications - സൗജന്യ PDF ഡൗൺലോഡ് ചെയ്യുക
Last updated on Apr 1, 2025
Latest Digital and Satellite Communications MCQ Objective Questions
Top Digital and Satellite Communications MCQ Objective Questions
Digital and Satellite Communications Question 1:
Which of the following statement in wrong in respect of GPS.
Answer (Detailed Solution Below)
Digital and Satellite Communications Question 1 Detailed Solution
The correct answer is It represents global position synchronization.
Key Points
- "It represents global position synchronization." This statement is wrong. GPS stands for Global Positioning System, which provides location and time information. While it does use synchronized signals from multiple satellites to determine a receiver's position, the term "global position synchronization" is not a standard or recognized term in the context of GPS technologies.
Additional Information
- "It is a space satellite communication system." This statement is correct. The GPS (Global Positioning System) is a satellite-based radionavigation system that provides geolocation and time information to a GPS receiver in all weather conditions, anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites.
- "It is modernization of Global air traffic system, weather, and local services." This statement is correct. While GPS was initially developed for military purposes by the U.S Department of Defense, its wide array of applications has indeed modernized numerous sectors including aviation (air traffic management), meteorology (for improving weather forecasts), and a variety of local services based on geolocation (such as navigation services, emergency services, etc.).
- "It represents the global positioning system." This statement is correct, as GPS stands for the Global Positioning System. This indicates a system that can provide information about position and time, under any weather conditions, anywhere on or near the Earth's surface.
In practical terms, GPS helps with a wide range of activities, not least transportation and navigation, but also sectors like agriculture, where it can help tractors autopilot in a field, or everyday services like mobile phone apps, where it helps with things like tracking running routes or hailing taxis. Since GPS isn’t dependent on terrestrial telecommunication infrastructures, it also plays a crucial role in disaster relief, where it can be used for search and rescue operations or to guide aid to uncharted places.
Digital and Satellite Communications Question 2:
In pulse width modulation of the chopper
Answer (Detailed Solution Below)
Digital and Satellite Communications Question 2 Detailed Solution
In pulse width modulation the width of the pulse (duration the signal is ON) is varied according to the message signal. Therefore T is kept constant and Ton is varied, where T is total pulse period and TON is the time the pulse is ON or High.
Digital and Satellite Communications Question 3:
Multiplexing is the combining of two or more input signals into a composite output signal for simultaneous transmission. What is the expansion of FDMA?
Answer (Detailed Solution Below)
Digital and Satellite Communications Question 3 Detailed Solution
Frequency Division Multiple Access or FDMA is frequency division multiplexing of signals. In it, the signals are frequency modulated at carrier frequencies separated bands.
Digital and Satellite Communications Question 4:
PWM stands for
Answer (Detailed Solution Below)
Digital and Satellite Communications Question 4 Detailed Solution
PWM or Pulse Width Modulation is a pulse modulation method in which the width (duration of pulse) of the carrier signal pulse is varied proportional to the message signal amplitude.
Digital and Satellite Communications Question 5:
The distance range of communication in the microwave band (without using satellites), depends largely on
Answer (Detailed Solution Below)
Digital and Satellite Communications Question 5 Detailed Solution
Microwave communications without satellite connection are the line of sight communication. In Line of sight communication the higher the transmitting and receiving antennas the farther distance across the horizon they can establish a direct connection.