Case Question 2Jenna has recently been hired to update a company's Web site, specifically to improve the appearance, consistency, and readability of its pages.When using the property that controls the amount of white space between letters in a word, setting a negative value will ____.
A. increase spacing between letters
B. decrease spacing between letters
C. keep spacing the same
D. make text harder to read
Answer: B
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Consider the following relations that represent part of a real estate database:
``` Agent(Id, AgentName) House(Address, OwnerId, AgentId) Amenity(Address, Feature) ``` The Agent relation keeps information on real estate agents, the House relation has information on who is selling the house and the agent involved, and the Amenity relation provides information on the features of each house. Each relation has its keys underlined. Consider the following query: ``` SELECT H.OwnerId, A.AgentName FROM House H, Agent A, Amenity Y WHERE H.Address=Y.Address AND A.Id = H.AgentId AND Y.Feature = ’5BR’ AND H.AgentId = ’007’ ``` Assume that the bu?er space available for this query has 5 pages and that the following statistics and indices are available: 1. Amenity 10,000 records on 1000 houses, 5 records per page Clustered 2-level B+ tree index on Address Unclustered hash index on Feature, 50 features 2. Agent 200 agents with 10 tuples per page Unclustered hash index on Id 3. House 1000 houses with 4 records per page Unclustered hash index on AgentId Clustered 2-level B+ tree index on Address Answer the following questions (and explain how you arrived at your solutions). a. Draw a fully pushed query tree corresponding to the above query. b. Find the best query plan to evaluate the above query and estimate its cost. c. Find the next-best plan and estimate its cost.
Some people use a password ________ to store passwords so they do not have to remember all of them
Fill in the blank(s) with correct word
Another name for binary expressions is multiplicative expressions.
Answer the following statement true (T) or false (F)
Write multiway if-else statements in which letter grades are assigned based a numeric grade based on this “ten point” scheme:
if the numeric grade is not less than 90, the letter grade is an A, if the numeric grade is not less than 80, the letter grade is a B, if the numeric grade is not less than 70, the letter grade is C, if the numeric grade is not less than 60, the letter grade is D, otherwise the letter grade is F.