In Linux, ____ devices cannot host a file system.
A. write
B. read
C. block
D. char
Answer: D
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Using the Hotel schema given at the start of the Exercises at the end of Chapter 4, determine whether the following queries are semantically correct:
(a) SELECT r.type, r.price FROM Room r, Hotel h WHERE r.hotel_number = h.hotel_number AND h.hotel_name = ‘Grosvenor Hotel’ AND r.type > 100; (b) SELECT g.guestNo, g.name FROM Hotel h, Booking b, Guest g WHERE h.hotelNo = b.hotelNo AND h.hName = ‘Grosvenor Hotel’; (c) SELECT r.roomNo, h.hotelNo FROM Hotel h, Booking b, Room r WHERE h.hotelNo = b.hotelNo AND h.hotelNo = ‘H21’ AND b.roomNo = r.roomNo AND type = ‘S’ AND b.hotelNo = ‘H22’;
One reason to use the class attribute is to assign the same _____ to multiple elementsthat belong to the same class.
A. rule B. format C. style D. theme
COGNITIVE ASSESSMENT A career in designing and fabricating chips is in which field?
A. technology equipment B. apps C. software D. marketing
All routers block ____________________ IP addresses.
Fill in the blank(s) with the appropriate word(s).