In a wide area connectivity map, mobile or wireless sites are indicated by circles containing the letter ____.?
A. ?A
B. ?E
C. ?M
D. ?X
Answer: C
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Host-based intrusion detection is especially useful for detecting ________.
a) brute-force attacks b) cryptanalytic attacks c) denial-of-service attacks d) Trojan horse attacks
The table Faculty has 60,000 rows, each row occupies 100 bytes, and the database page size is 4 k bytes. The table contains an attribute City, indicating the city in which a professor lives, there are 50 cities with names city10 ...city50, and professors are randomly distributed over the cities. Assuming that pages in the index and data ?les are 100% occupied, estimate the number of page
transfers required for the following SELECT statement in each of the cases listed below. ``` SELECT F.Id FROM Facu lty F WHERE F.City > ’city10’ AND F.City < ’city21’ ``` a. The table has no index. b. The table has a clustered B+ tree index on City. Assume a (nonleaf) index entry has 25 characters. c. The table has an unclustered B+ tree index on City. Assume an index entry has 25 characters. d. The table has an unclustered B+ tree index on (City, Id). Assume an index entry has 40 characters. e. The table has an unclustered B+ tree index on (Id, City). Assume an index entry has 40 characters.
When setting the resolution of an image, you can specify the number of ____ per inch, or per centimeter, on the printed page.
a. pixels b. samples c. units d. gradients
You should put a semicolon after the condition in a selection structure.
Answer the following statement true (T) or false (F)