On many computers a layer of __________, sometimes called firmware, lies between memory and the processor
a. cache memory
b. microcode
c. coprocessors
d. none of the above
d. none of the above
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Because the postfix increment operator returns objects by value and the prefix increment operator returns objects by reference:
a. Prefix increment has slightly more overhead than postfix increment. b. The postfix increment operator returns the actual incremented object with its new value. c. Objects returned by postfix increment cannot be used in larger expressions. d. The postfix increment operator typically returns a temporary object that contains the original value of the object before the increment occurred.
Which of the following is a correct declaration?
a) const char yes = ‘y’; b) const string yes = ‘y’; c) const char yes = “y”; d) const char yes = ‘yes’;
What are some of the most common events that may indicate an attack in progress?
What will be an ideal response?
Consider SQL queries Q1, Q8, Q1B, Q4, Q27 in Chapter 5.
(a) Draw at least two query trees that can represented each of these queries. Under what circumstances would you use each of your query trees? (b) Draw the initial query tree for each of these queries; then show how the query tree is optimized by the algorithm outlined in section 19.7. (c) For each query, compare your on query trees of part (a) and the initial and final query trees of part (b).