In terms of security, it is a good idea to store passwords as text strings within a database.
Answer the following statement true (T) or false (F)
False
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A decision symbol in an activity diagram takes the shape of a ________.
a. Diamond. b. Rectangle. c. Circle. d. Triangle.
Variance in response times measures __________.
a) the typical response time the user expects b) the range of response times in the system c) predictability—how response times differ from the mean response time d) how the response time changes based on changes in the system's workload
When a list is sorted, a high-speed binary search technique can find items in the list quickly. The binary search algorithm eliminates from consideration one-half of the elements in the list being searched after each comparison. The algorithm locates the middle element of the list and compares it with the search key. If they are equal, the search key is found, and the subscript of that element is
returned. Otherwise, the problem is reduced to searching one half of the list. If the search key is less than the middle element of the list, the first half of the list is searched. If the search key is not the middle element in the specified piece of the original list, the algorithm is repeated on one-quarter of the original list. The search continues until the search key is equal to the middle ele- ment of the smaller list or until the smaller list consists of one element that is not equal to the search key (i.e. the search key is not found.) Even in a worst-case scenario, searching a list of 1024 elements will take only 10 comparisons during a binary search. Repeatedly dividing 1024 by 2 (because after each comparison we are able to eliminate from the consideration half the list) yields the values 512, 256, 128, 64, 32, 16, 8, 4, 2 and 1. The number 1024 (210) is divided by 2 only ten times to get the value 1. Dividing by 2 is equiva- lent to one comparison in the binary-search algorithm. A list of 1,048,576 (2 20) elements takes a maximum of 20 comparisons to find the key. A list of one billion elements takes a maximum of 30 comparisons to find the key. The maximum number of comparisons needed for the binary search of any sorted list can be determined by finding the first power of 2 greater than or equal to the number of elements in the list. Write a program that implements function binarySearch, which takes a sorted list and a search key as arguments. The function should return the index of the list value that matches the search key (or -1, if the search key is not found). What will be an ideal response?
You can use ________ to describe groups of data by calculating values such as totals and maximums
Fill in the blank(s) with correct word