The Term "Stale Data" Refers to a Situation in Multi-CPU

question 37

Multiple Choice

The term "stale data" refers to a situation in multi-CPU machines when one thread modifies shared data and a second thread accesses that data later, but sees the data value before the change took place.What is required to guarantee that the second thread sees the updated data, not stale data?

• A)The second thread should not try to acquire the lock.
• B)The first thread should not try to acquire the lock.
• C)Neither thread should use locks.
• D)The first thread should release the lock after changing the data.

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Definitions:

Long-Run Supply

The total quantity of goods or services that producers are willing and able to supply over a long period, considering all inputs and production costs are variable.

Production

The process of combining various material inputs and immaterial inputs (plans, know-how) in order to make something for consumption (the output).

Supply Curves

Graphical representations showing the relationship between the price of a good and the quantity of that good that suppliers are willing and able to sell, holding other factors constant.

Long Run

A period in economics in which all factors of production and costs are variable, allowing all inputs to be adjusted.