The ________ is at the very top of a Word window and displays the file name and application, as well as the Quick Access Toolbar
Fill in the blank(s) with correct word
title bar
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S1 returns the total number of credits for which Joe is registered, together with his Id. T maintains the integrity constraint “no student shall register for more than 20 credits.” If Joe has less than 20 credits, T executes S2 to increment the number of credits for which Joe has registered in a particular course. Suppose Joe executes two instances of T concurrently at the following isolation levels. In each case say whether or not the named violation of the constraint can occur and, if the answer is yes, explain how(e.g., what locks are or are not held).
A database has two tables:
Student(Id, Name, ...)—Id and Name are both unique Registered(Id, CrsCode, Credit, ...)—contains one rowfor each course each student is taking this semesterA transaction type, T, has two SQL statements, S1 followed by S2 (w ith local computations between them):
S 1 SELECT SUM(R.Credits), S.Id INTO :sum, :id FROM Student S, Registered R WHERE S.Name = ’Joe’ AND S.Id = R.Id GROUP BY S.Name, S.Id
S 2 UPDATE Registered SET Credits = Credits + 1 WHERE Id = :id AND CrsCode = :crsa. READ COMMITTED lost update b. REPEATABLE READ lost update c. SNAPSHOT lost update
If your firewall allowed only the machine with the IP address 192.168.1.1 to send email outside the network, how would you instruct the local copy of sendmail to use this server as a relay?
What will be an ideal response?
Which of the following risks relates to negative public opinion?
A. Operational risk B. Strategic risk C. Financial risk D. Reputational risk
A hub and a repeater operate at Layer 2 of the OSI model.
a. true b. false