Assume the Shared Buffer Is Implemented as a Circular Array

question 6

Multiple Choice

Assume the shared buffer is implemented as a circular array with two logical pointers: in and out. The variable in points to the next free position in the buffer; out points to the first full position in the buffer. Which of the following is true?

• A) The buffer is empty when in == out; the buffer is full when ((in + 1) % BUFFER SIZE) == out;
• B) The buffer is full when in == out; the buffer is empty when ((in + 1) % BUFFER SIZE) == out;
• C) All the elements of the buffer can be used;
• D) Both A and C

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