Q. system.time function returns an object of class _______ which contains two useful bits of information.

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Q. _________ time is time charged to the CPU(s) for the R expression.

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Q. The elapsed time may be ________ than the user time if your machine has multiple cores/processors.

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Q. Parallel processing is done via __________ package can make the elapsed time smaller than the user time.

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Q. You can time ________ expressions by wrapping them in curly braces within the call to system.time().

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Q. The profiler can be turned off by passing _________ to Rprof().

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Q. Point out the correct statement?

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Q. How many methods exist for normalizing the data?

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Q. _______ divides the time spend in each function by the total run time.

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Q. Point out the correct statement?

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Q. Which of the following function actually fits the linear model?

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Q. The final bit of output that summaryRprof() provides is the ______ interval and the total runtime.

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Q. Which of the following statement gives sampling interval?

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Q. Which of the following code is not profiled?

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Q. _______ grammar makes a clear distinction between your data and what gets displayed on the screen or page.

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Q. Point out the wrong statement?

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Q. Which of the following cuts numeric vector into intervals of equal length?

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Q. Which of the following is a plot to investigate the order in which observations were recorded?

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Q. Point out the wrong statement?

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Q. ________ is used for translating between qplot and base graphics.

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