Discuss how virtualization enables power saving.
What will be an ideal response?
Before virtualization, each server OS needed to be on a unique physical system. With virtualization, you can place multiple virtual servers on a single physical system, reducing electrical power use substantially. Rather than one machine running a Windows server and acting as a file server and DNS server, and a second machine running Linux for a DHCP server, for example, the same computer can handle both operating systems simultaneously. Apply this over an enterprise network or on a data server farm, and the savings-both in terms of dollars spent and electricity used-are tremendous.
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Which of the following statements is false?
a. The standard deviation is the square root of the variance (in this case, 1.5), which tones down the effect of the outliers. b. The smaller the variance and standard deviation are, the further the data val-ues are from the mean and the greater overall dispersion (that is, spread) there is between the values and the mean. c. The following code calculates the population standard deviation with the sta-tistics module’s pstdev function: statistics.pstdev([1, 3, 4, 2, 6, 5, 3, 4, 5, 2]) d. All of the above statements are true.
Compute the grade point average (GPA) for a beginning student who has completed only the following courses:
The ____ statement is used for exception handling in a procedure.
A. Try…Catch B. LINQ C. ORDER BY D. aggregate
The only tangible benefit of parallel processing systems is faster processing.
Answer the following statement true (T) or false (F)