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ISRO | ISRO CS 2008 | Question 14

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Assume that each character code consists of 8 bits. The number of characters that can be transmitted per second through an asynchronous serial line at 2400 baud rate, and with two stop bits, is:

(A)

109

(B)

216

(C)

218

(D)

219



Answer: (C)

Explanation:

\”2400 baud\” means that the serial port is capable of transferring a maximum of 2400 bits per second. 

Total Data To send = 1 bit(start) + 8 bits(char size) + 2 bits(Stop) = 11 bits. 

Number of 8-bit characters that can be transmitted per second = 2400/11 

                                                                                                                    = 218.18 

The effective number of characters transmitted = 218 

So, the correct option is (C).

Note: In Asynchronous serial data transfer parity bit is optional. 


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Last Updated : 11 Jun, 2018
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