Linux has system calls that change the size of the process data segment, either by expanding it to accommodate extra data values or reducing it when certain values positioned at the end of the data segment are no longer needed.

A_____ is a storage device that moves data in sequences of bytes or bits (blocks). Hint: These devices support random access and generally use buffered I/O.

A. block map B. storage block C. mapping device D. block device

The header node

a. simplifies deletion b. simplifies insertion c. uses only constant extra space d. two of the above e. all three of (a), (b), and (c)