For the following ideal systems, calculate the hit ratio h required to achieve the stated speedup ratio S.
S = 1/(h?k + 1 ? h) or h = (S ? 1)/(S ? S?k) = (S ? 1)/(S?(1 ? k))
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An agency called Instant Cover supplies part-time/temporary staff to hotels within Scotland. The table shown in Figure 14.20 lists the time spent by agency staff working at various hotels. The National Insurance Number (NIN) is unique for every member of staff.
What will be an ideal response?
Consider a hash function, h, that takes as an argument a value of a composite search key that is a sequence of r attributes, a 1 , a 2 ,...,a r .If h has the form
h(a1? a2? ...? ar)=h1(a1) ? h2(a2) ? ...? hr(ar) where hi is a hash of attribute ai and ? is the concatenation operator, h is referred to as a partitioned hash function. Describe the advantages of such a function with respect to equality, partial-key, and range searches.
________ costs individuals and businesses millions of dollars every year through viruses, malware, online credit card fraud and phishing, or e-mail scams
Fill in the blank(s) with correct word
____________________ markup means comparing code against the current standards and identifying code that is not compliant.
Fill in the blank(s) with the appropriate word(s).