Visualization is very powerful and it will certainly help your overall understanding of the requirements.
Answer the following statement true (T) or false (F)
True
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With regard to default arguments:
a) Zero or more call-by-value parameters in a function may have default arguments. b) All value parameters must have default arguments. c) If a function has a reference parameter, no parameters to the left of the reference parameter may have default arguments. d) If a parameter is missing a default argument, no parameters to the left of this point may have a default argument. e) Reference parameters can have default arguments.
The information in a data mart spans an entire enterprise
Indicate whether the statement is true or false
What does the term CPM refer to with regards to online advertising?
(a) The cost to advertise for every thousand click-throughs from a page. (b) The cost to advertise for every thousand unique visitors to a page (c) The cost to advertise for every thousand total hits to a page. (d) The cost to advertise for every hundred unique visitors to a page.
Estimate the number of page transfers needed to compute r s using a sort-merge join, assuming the following: A=B
1. The size of r is 1000 pages, 10 tuples per page; the size of s is 500 pages, 20 tuples per page. 2. The size of the main memory bu?er for this join computation is 10 pages. 3. The Cartesian product of matching tuples in r and s (see Figure 10.7) is computed using a block-nested loops join. 4. r.A has 100 distinct values and s.B has 50 distinct values. These values are spread around the ?les more or less evenly, so the size of ?A=c(r), where c r.A, does not vary much with c.