PNG stands for ________
A) Picture Normalized Graphics
B) Pixel Normalized Graphics
C) Portable Network Graphics
D) Pattern Naturalized Graphics
C
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When the ____ check box is not checked in the Image Size dialog box, the total number of pixels in the image must remain the same.
A. Resample Size B. Resize Image C. Sample Image D. Resample Image
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.