The Universal Product Code (UPC) is a barcoded number that uniquely identifies many products sold in the United States. For example, all printed copies of this textbook sold in the United States have the same UPC bar code on the back cover. Now consider how the design of the RMO database might change if each individual item sold by RMO were required by law to carry a permanently attached UPC (e. g., on a label sewn into a garment or on a Radio Frequency Identification [RFID] tag attached to an item). How might the RMO relational database schema change under this requirement?

What statement best describes operating systems? it’s possible for modern computers to function without operating systems. most operating systems are free or very inexpensive. operating systems are managed by the computer’s microprocessor (cpu). operating systems manage the computer’s random access memory (ram).

When making changes to optimize part of a processor, it is often the case that speeding up one type of instruction comes at the cost of slowing down something else. for example, if we put in a complicated fast floating-point unit, that takes space, and something might have to be moved farther away from the middle to accommodate it, adding an extra cycle in delay to reach that unit. the basic amdahl's law equation does not take into account this trade-off. a. if the new fast floating-point unit speeds up floating-point operations by, on average, 2ă—, and floating-point operations take 20% of the original program's execution time, what is the overall speedup (ignoring the penalty to any other instructions)? b. now assume that speeding up the floating-point unit slowed down data cache accesses, resulting in a 1.5ă— slowdown (or 2/3 speedup). data cache accesses consume 10% of the execution time. what is the overall speedup now? c. after implementing the new floating-point operations, what percentage of execution time is spent on floating-point operations? what percentage is spent on data cache accesses?

What percentage of teens plays video games? a.97% b.100% c.74% d.50%