A trainee who learns most effectively by performing a task is a(n) ____________________ learner.
Fill in the blank(s) with the appropriate word(s).
kinesthetic
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You can indicate that a statement continues on the next line using a ____.
A. comment B. forwardslash C. backslash D. comma
To change the program that opens a file in Mac OS X, which of the following would be used?
A) Finder B) Control Panel C) Properties D) File Explorer
Answer the following:
(a) The equivalence
where a1 and a2 are disjoint subsets of a satisfying a = a1
U a2 holds under certain conditions on a1, a2, and c. State the conditions.
(b) Using the schema:
Sailors(sid: integer, sname: string, rating: integer, age: real)
key - sid
Boats(bid: integer, bname: string, color: string)
key - bid
Reserves(sid: integer, bid: integer, day: date)
key - sid, bid, day
(c) Consider the SELECT statement:
SELECT S.sname, S.rating
FROM Sailors S, Reserves R
WHERE S.sid = R.sid AND R.day = '5/11/98'
which uses the schema of (7b). Express it as an unoptimized relational algebra expression
using the operators natural join, select, and project.
(d) Give an equivalent relational algebra expression for the same query that can be evaluated
more eciently. Explain why you expect more ecient evaluation (no numbers).
The Word Options dialog box can be reached from the ________
A) Trust Center B) Backstage View C) Customize Ribbon D) Home tab