Write SQL query (5.10), and query (5.11), using TRC and DRC.
What will be an ideal response?
Find all courses taught in fall 1995 together with the professors who taught those courses.
a. TRC:
{C.Name, P.Name | Course(C) AND Professor(P) AND
?T ? Teaching (T.Semester= ’F1995’ AND
T.CrsCode= C.CrsCode AND T.ProfId= P.Id)) }
b. DRC:
{CName, PName |?CDept?CrsCode?PId?PDept
(Course(CDept,CrsCode,CName)
AND Professor(PId,PName,PDept)
AND Teaching(PId,CrsCode,’F1995’)) }
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Molly, an end user, connects an external monitor, external keyboard and mouse, and a wired network cable to her laptop while working in the office. She leaves the office frequently to meet with customers and takes the laptop with her. Disconnecting and reconnecting these external connections has become inconvenient. Which of the following devices will allow the user to disconnect and reconnect the laptop to the external connections with the least amount of effort? (Select TWO).
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What will be an ideal response?