Problems are ranked by importance based on the time when they were logged
Indicate whether the statement is true or false
FALSE
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Calculate the cardinality and minimum cost for each of the following Join operations:
? 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 J1: Hotel hotelNo Room Assume nBuffer = 100 J2: Hotel hotelNo Booking J3: Room roomNo Booking J4: Room hotelNo Hotel J6: Booking roomNo Room
A column that will always have a different value is a _______.
Fill in the blank(s) with the appropriate word(s).
Logic and control tiles can be found at the bottom of the ____.
A. Tile B. Editor area C. File area D. Details area
The SAM database is encrypted with a locally stored system key. For additional security, you can configure Windows to store the startup key on a floppy disk or you can specify a password to be entered manually at startup. The command-line for this is _____________
a. Rodcmgmt b. Syskey c. pkey d.dsmgmt