Synchronous-and-asynchronous-Communication

Question 1
In asynchronous serial transfer of characters, which of the following ordered pair of bits represents the used as delimiters for every character.
A
0,1 >
B
(00,01>
C
1,0>
D
01,00>
Question 2
How many ASCII characters can be transmitted per second over a 2400bps line if the transfer is asynchronous with start and stop bits in addition to parity bit with each character?
A
300
B
240
C
340
D
2400
E
None of the Above
Question 2 Explanation: 
To transfer 1 character of 8 bit we need
8 bit + 1 start bit + 1 stop bit + 1 parity bit = 11 bit.
Hence no. of characters that can be transmitted per second is = 2400/11 = 218
There are 2 questions to complete.

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