Answer the following statements true (T) or false (F)
1. When a variable is declared in the initialization expression of a for loop, the scope of the variable is limited to the loop.
2. In the update expression of a for loop, you must use the ++ operator in the increment expression.
3. In a counter-controlled loop, you can only decrement the counter variable.
4. The do-while loop always performs at least one iteration, even if its Boolean expression is false to begin with.
1. true
2. false
3. false
4. true
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Consider a relation schema MyAccount (StockSymbol, Quantity, Price), which records the user's stock holdings: the name of the stock, quantity, and current price. StockSymbol is a key. The user wants a small window on her desktop to show the following view:
CREATE VIEW MyTotals(StockSymbol, Total) AS SELECT M.StockSymbol, M.Quantity * M.Price FROM MyAccount MThe stock broker allows the user to compute the value of the view only once a day, so periodic recomputation of the view is not an option. However, the broker allows triggers that re whenever an update to the rows of MyAccount occurs. Write a row-level trigger that can provide the user with an up-to-date view of the above kind.
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Indicate whether the statement is true or false
If you want to use the full set of image-editing tools available in Photoshop, you need to rasterize text to change it to a ____ object.
a. vector b. bitmap c. character d. baseline
Which of the following is a client- server based authentication software system which maintains user profiles in a central database?
A. CHAP B. MSCHAP C. RADIUS D. EAP