To draw a polygon, you pass to the method:
a) a brush or pen
b) an array of points
c) a brush or pen, and an array of points
d) a grid with a list of points drawn on it
c) a brush or pen, and an array of points
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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
________________ clauses exist in acceptable use policies so that companies can discipline employees whose computer activities interfere with productivity.
Fill in the blank(s) with the appropriate word(s).
When working in a Text Pane, which of the following shortcut keys adds a tab character?
A. TAB B. ENTER C. CTRL+TAB D. F7
A processor executes an instruction in the following six stages. The time required by each stage in picoseconds (1,000 ps = 1 ns) is given for each stage.
IF instruction fetch 300 ps ID Instruction decode 150 ps OF Operand fetch 250 ps OE Execute 350 ps M Memory access 700 ps OS Operand store (writeback) 200 ps a. What is the time to execute an instruction if the processor is not pipelined? b. What is the time taken to fully execute an instruction assuming that this structure is pipelined in six stages and that there is an additional 20 ps per stage due to the pipeline latches? c. Once the pipeline is full, what is the average instruction rate? d. Suppose that 25% of instructions are branch instructions that are taken and cause a 3?cycle penalty, what is the effective instruction execute time?