A ____ consists of webpages in which authorized users can make edits to content, such as supplementing or deleting.
A. channel
B. wiki
C. chat room
D. mailing list
Answer: B
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Provide the equivalent tuple relational calculus and domain relational calculus expressions for each of the relational algebra queries given in Exercise 4.8.
a) ?hotelNo (?price ? 50 (Room) ) b) ?Hotel.hotelNo ? Room.hotelNo(Hotel ? Room) c) ?hotelName (Hotel Hotel.hotelNo ? Room.hotelNo (?price ? 50 (Room)) ) d) Guest (?dateTo ? ‘1-Jan-2007’ (Booking)) e) Hotel Hotel.hotelNo ? Room.hotelNo (?price ? 50 (Room)) ) f) ?guestName, hotelNo (Booking Booking.guestNo ? Guest.guestNo Guest) ?
When you multiply white, white always becomes ____________________.
Fill in the blank(s) with the appropriate word(s).
FIGURE 10-1
Referring to Figure 10-1 above, the style attribute of the second table cell initially sets the background color to ____.
A. white B. black C. either a. or b. D. neither a. nor b.
You can access the system configuration dialog by typing the ____ command at the privileged EXEC prompt.
A. init B. config C. dialog D. setup