Bissoy.com
Doctors Medicines MCQs Q&A

Bits can be sent over guided and unguided media as analog signal by ___________

Bits can be sent over guided and unguided media as analog signal by ___________ Correct Answer digital modulation

In analog modulation, digital low frequency baseband signal (digital bit stream) is transmitted over a higher frequency. Whereas in digital modulation the only difference is that the base band signal is of discrete amplitude level. The bits are represented by only two frequency levels, one for high and one for low.

Related Questions

Passage: The phenomenal rise of social media (SM) platforms such as Facebook, Twitter and others is proving to be a double-edged sword in the functioning of democracies. On the one hand, it has democratized access to information. On the other hand, it has concentrated power over that information with a handful of private companies, their billionaire owners, and certain ideologically committed activist groups. Statements: (A) Social media allow the democratisation of information and broader communication. (B) Social media bypass traditional curators of information like Journalists and PIB. (C) Social media reduce the cost of creating and disseminating information. Question: Which of the above statements weakens the argument that social media is desirable?
The question below consists of a set of labelled sentences. These sentences, when properly sequenced form a coherent paragraph. Select the most logical order of sentences from among the options. P: The word ‘media’ is derived from the word medium, signifying mode or carrier. Q: Media is intended to reach and address a large target group or audience. R: In today’s world, media becomes as essential as our daily needs. S: The word was first used in respect of books and newspapers i.e. print media and with the advent of technology, media now encompasses television, movies, radio and internet.
The question below consists of a set of labelled sentences. These sentences, when properly sequenced form a coherent paragraph. Select the mostlogical order of sentences from among the options.
P: The word media is derived from the word medium, signifying mode or carrier.
Q: Media is intended to reach and address a large target group or audience.
R: In todays world, media becomes as essential as our daily needs.
S: The word was first used in respect of books and newspapers i.e. print media and with the advent of technology, media now encompasses television, movies, radio
and internet.
Simplify : $${{{5 \over 3} \times {7 \over {51}}{\text{ of }}{{17} \over 5} - {1 \over 3}} \over {{2 \over 9} \times {5 \over 7}{\text{ of }}{{28} \over 5} - {2 \over 3}}}$$
Assume that a 12-bit Hamming codeword consisting of 8-bit data and 4 check bits is d8d7d6d5c8d4d3d2c4d1c2c1, where the data bits and the check bits are given in the following tables: Data bits d8 d7 d6 d5 d4 d3 d2 d1 1 1 0 x 0 1 0 1   c8 c4 c2 c1 Y 0 1 0 Which one of the following choices gives the correct values of x and y?
Which statement(s) about IPv4 and IPv6 addresses are true?1. An IPv6 address is 32 bits long, represented in hexidecimal.2. An IPv6 address is 128 bits long, represented in decimal.3. An IPv4 address is 32 bits long, represented in decimal.4. An IPv6 address is 128 bits long, represented in hexidecimal.
In the following question, the 1st and the last part of the sentence/passage are numbered 1 and 6. The rest of the sentence/ passage is split into four parts and named P, Q, R and S. These four parts are not given in their proper order. Read the sentence/ passage and find out which of the four combinations is correct. 1. It is widely known that the use of social media affects mental health, but a new, three-year study has found that it is the lack of sleep from its use and the psychological distress caused by cyberbullying via the platforms that are the main reasons affecting one’s state of mind, more than use of the actual apps. P. Girls who were checking social media also reported to be less happy and more anxious; however, boys didn’t report the same feelings. Q. In girls, the researchers said, the negative effects were due to disrupted sleep, cyberbullying and to some extent, lack of exercise. R. Researchers found that girls and boys who checked social media sites more than thrice a day had poorer mental health and greater psychological distress. S. In boys, the same three factors — disrupted sleep, cyberbullying, lack of exercise — had an effect too, but it was much smaller. 6. Dr Dasha Nicholls, from Imperial College London, who was also involved in the study added, “It’s not the amount of social media, per se, it’s when it displaces real-life contact and activities. It’s about getting a balance.”
Consider the following statements regarding modulation : 1. The communication systems, where a weak signal is transmitted by the use of a modulation is essential in carrier signal. 2. When the frequency of the high frequency signal is varied in accordance with the intensity of the low-frequency weak signal, the modulation is said to be frequency modulation. 3. The process of recovering original baseband signal from the modulated signal is called phase modulation. Which of the above statements are correct ? 
If the signal to be analyzed is an analog signal, we would pass it through an anti-aliasing filter with B as the bandwidth of the filtered signal and then the signal is sampled at a rate __________
Number of Unguided Media is: