单项选择题

A PM wanted to show management, visually, how quality controls were affecting processes. The best tool to accomplish this is（）

A．Diagrams
B．Histograms
C．Flowcharts
D．Control charts

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单项选择题
（）operate by distributing a workload evenly over multiple back end nodes. Typically the cluster will be configured with multiple redundant load-balancing front ends.

A．High-availability clusters
B．Load-balancing clusters
C．Grid computing
D．Cloud Computing
单项选择题
In software engineering and systems engineering,（）is a description of a system's behavior as it responds to a request that originates from outside of that system.

A．black box
B．business rule
C．use case
D．traceability matrix
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