Exam-style question
Try this first
What is the purpose of a start bit in asynchronous transmission?.
- A.To indicate to the receiver that a character or unit of data is about to begin.
- B.To confirm that the entire transmission has finished.
- C.To provide a second physical communication line.
- D.To replace all data bits in the character.
Model answer
What a good answer should say
- To indicate to the receiver that a character or unit of data is about to begin.
Explanation
Why this works
A start bit alerts the receiver that incoming data is beginning, so it can prepare to read the following data bits.
Common mistake
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