The ____ is the size and shape of the computer.?
A. ?device driver
B. ?form factor
C. ?platform
D. ?operating system
Answer: B
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Handling short computations in the GUI thread ________.
a) does not cause the GUI to become unresponsive b) makes the GUI appear choppy. c) indefinitely potpnes the GUI. d) deadlocks the GUI.
Calculate the cardinality and minimum cost for each of the following Selection operations:
Using the Hotel schema, assume the following indexes exist: ? a hash index with no overflow on the primary key attributes, roomNo/hotelNo in Room; ? a clustering index on the foreign key attribute hotelNo in Room; ? a B + -tree index on the price attribute in Room; ? a secondary index on the attribute type in Room. nTuples(Room) = 10000 bFactor(Room) = 200 nTuples(Hotel) = 50 bFactor(Hotel) = 40 nTuples(Booking) = 100000 bFactor(Booking) = 60 nDistinct hotelNo (Room) = 50 nDistinct type (Room) = 10 nDistinct price (Room) = 500 min price (Room) = 200 max price (Room) = 50 nLevels hotelNo (I) = 2 nLevels type (I) = 2 nLevels price (I) = 2 nLfBlocks price (I) = 50 S1: ? roomNo=1 ? hotelNo=1 (Room) S2: ? type=‘D’ (Room) S3: ? hotelNo=2 (Room) S4: ? price>100 (Room) S5: ? type=‘S’ ? hotelNo=3 (Room) S6: ? type=‘S’ ? price < 100 (Room)
You should revise the creative brief if your design implementation changes
Indicate whether the statement is true or false
The features of an object-oriented (O-O) approach include modular design and single-use code, which increases costs and slows down development. ?
Answer the following statement true (T) or false (F)