Computer organization mcqs parallel ports

 

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Computer organization mcqs parallel ports

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Question 1
The ..... circuit enables the generation of the ASCII code when the key is pressed.
A
Generator
B
Debouncing
C
Encoder
D
Logger


Question 1 Explanation: 
The signal generated upon the pressing of a button is encoded by the encoder circuit into the corresponding ASCII value.
Question 2
To overcome multiple signals being generated upon a single press of the button, we make use of .....
A
Generator circuit
B
Debouncing circuit
C
Multiplexer
D
XOR circuit


Question 2 Explanation: 
When the button is pressed, the contact surfaces bounce and hence it might lead to the generation of multiple signals. In order to overcome this, we use Debouncing circuits.
Question 3
The best mode of connection between devices which need to send or receive large amounts of data over a short distance is .....
A
BUS
B
Serial port
C
Parallel port
D
Isochronous port


Question 3 Explanation: 
The parallel port transfers around 8 to 16 bits of data simultaneously over the lines, hence increasing transfer rates.
Question 4
The output of the encoder circuit is/are .....
A
ASCII code
B
ASCII code and the valid signal
C
Encoded signal
D
None of the mentioned


Question 4 Explanation: 
The encoder outputs the ASCII value along with the valid signal which indicates that a key was pressed.
Question 5
The disadvantage of using a parallel mode of communication is .....
A
It is costly
B
Leads to erroneous data transfer
C
Security of data
D
All of the mentioned


Question 5 Explanation: 
The parallel mode of data transfer is costly as it involves data being sent over parallel lines.
There are 5 questions to complete.

 

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