Stale Data Occurs in Multi-CPU Machines When One Thread Modifies

question 45

Multiple Choice

Stale data occurs 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:

Price Elasticity of Supply

The measure of how the supply quantity of a product is affected by changes in its price is known as the price elasticity of supply.

Time Horizon

Describes the length of time over which an investment, project, or policy is evaluated or expected to have an impact.

Income Elasticity of Demand

A measure of how much the quantity demanded of a good responds to a change in consumers' income, holding all else constant.

Midpoint Method

A technique used in economics to calculate the percentage change between two points by dividing the change by the average of the initial and final values.