Question

What, exactly, is a buffer?

Question 1 options:

	a region of a disk drive for storage of bytes
	the beginning portion of the heap
	a region of RAM for storage of bytes
	a pointer to char

Question 2 (1 point)

What characteristic of buffers makes them efficient and accurate?

Question 2 options:

	they are implemented on the stack
	the memory is part of the heap
	the region of memory is contiguous
	they are written only in C

How do we track usage of a buffer?

Question 3 options:

	move the index of the start byte to the next position beyond the last byte read
	call the system function, buf_use
	save the buffer to a file
	store the number of times a buffer is accessed

Question 4 (1 point)

In addition to the index of the next byte to read in the buffer, what other information about the buffer do we need to update in order to manage use?

Question 4 options:

	the address of the buffer
	either the index of the last byte or the number of bytes stored in the buffer
	the data type of the buffer
	the capacity of the buffer

Question 5 (1 point)

What is the formula for determining whether to refill a buffer?

Question 5 options:

	if ( start_byte_index - last_byte_index + 1 ) >= count
	if ( last_byte_index - start_byte_index - 1 ) >= count
	if ( last_byte_index - start_byte_index + 1 ) >= count
	if ( start_byte_index - last_byte_index - 1 ) >= count

Answer 1

1 c) a region of RAM for storage of bytes

2 the memory is part of the heap

3 move the index of the start byte to the next position beyond the last byte read

4 the address of the buffer

5 if ( last_byte_index - start_byte_index + 1 ) >= count