.
The accompanying figure illustrates the rule of ninths.
Answer the following statement true (T) or false (F)
False
Computer Science & Information Technology
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Consider the following schema that represents houses for sale and customers who are looking to buy:
Customer(Id, Name, Address) Preference(CustId, Feature) Agent(Id, AgentName) House(Address, OwnerId, AgentId) Amenity(Address, Feature)Preference is a relation that lists all features requested by the customers (one tuple per customer/feature; e.g., 123, ’5BR’, 123,’2BATH’, 432,’pool’), and Amenity is a relation that lists all features of each house (one tuple per house/feature). A customer is interested in buying a house if the set of all features speci?ed by the customer is a subset of the amenities the house has. A tuple in the House relation states who is the owner and who is the real estate agent listing the house. Write the following queries in SQL: a. Find all customers who are interested in every house listed with the agent with Id 007. b. Using the previous query as a view, retrieve a set of tuples of the form feature, number of customers, where each tuple in the result shows a feature and the number of customers who want this feature such that – Only the customers who are interested in every house listed with Agent 007 are considered. – The number of customers interested in feature is greater than three. (If this number is not greater than three, the corresponding tuple feature, number of customers is not added to the result.)
Computer Science & Information Technology
?The Internet allows users to visit the _________, which contains billions of text and multimedia documents called webpages.
Fill in the blank(s) with the appropriate word(s).
Computer Science & Information Technology
Which loop statement does not contain an increment statement but automatically increments the counter at the end of each iteration?
A ) Do-While B ) Do-Until C ) For D ) While E ) None of these
Computer Science & Information Technology
In pseudocode, the “Repeat … Until” loop is considered a:
a. Pre-condition loop. b. Post condition loop. c. Nested loop d. Sequential loop. e. None of the above.
Computer Science & Information Technology