One good practice in a chat room is not to use your real name
Indicate whether the statement is true or false.
True—This may help avoid cyberstalking.
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Define pass-by-value and pass-by-reference.
What will be an ideal response?
Case G-2Flippy and Hammy, two local party clowns, have been taking lots of digital photos during their recent gigs. They want to use the photos for promotion, both by posting them to their Web site and by creating some eye-catching ads and hand-outs. Most of their pictures have been taken against a solid black background. While he sharpens the photos, Flippy is extremely happy that they use a solid black curtain as a backdrop at their shows. Why?
A. The black background makes for much stronger edges, as edges are the points in an image where pixels that are close in color abut one another. B. It is much easier for him to use the Lasso tools to select portions of the image. C. With the black contrasts against the colors of their costumes, the edges are already very sharp. D. The black background can easily be replaced with colors that are more printer-friendly.
(Enhanced Bubble Sort) Make the following simple modifications to improve the perfor- mance of the bubble sort you developed in Exercise 19.5:
a) After the first pass, the largest value is guaranteed to be in the highest-numbered element of the vector; after the second pass, the two highest values are “in place”; and soon. Instead of making nine comparisons (for a 10-element vector) on every pass, modify the bubble sort to make only the eight necessary comparisons on the second pass, seven on the third pass, and so on. b) The data in the vector may already be in the proper order or near-proper order, so why make nine passes (of a 10-element vector) if fewer will suffice? Modify the sort to check at the end of each pass whether any swaps have been made. If none have been made, the data must already be in the proper order, so the program should terminate. If swaps have been made, at least one more pass is needed.
A file developed by Microsoft that provides a visual image of a spreadsheet is a portable document format file
Indicate whether the statement is true or false