_____ means that a system can be expanded, modified, or downsized easily to meet the rapidly changing needs of a business enterprise.

The type of number that cannot be expressed as a fraction because the fractional part would go on for infinity without ever repeating a sequence is:

a. Floating point b. Rational c. Real d. Irrational

The scheme of ____ removes the possibility of a circular wait and therefore guarantees the removal of deadlocks.

A. hierarchical ordering B. preemption C. saving and restoring job state D. requesting all resources before job run