How can speculative execution be controlled at the job level in...

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How can speculative execution be controlled at the job level in Hadoop?

A. Set "mapred.map.tasks.speculative.execution" to true

B. Set "mapred.reduce.tasks.speculative.execution" to true

C. Use the "mapred.speculative.execution" configuration

D. Speculative execution cannot be controlled

Answer: Option C

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