A(n) _____ card is used to connect the laptop to an 802.11 network
Fill in the blank(s) with correct word
wireless
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An IP address that does not change and is usually assigned manually by a network administrator is called a ________
A) dynamic address B) static address C) fixed address D) stationary address
What are five ways the analyst can avoid biasing output?
What will be an ideal response?
Consider the following schema, where the keys are underlined:
The SSN attribute in Project is the Id of the employee working on the project and PID is the
Id of the project. There can be several employees per project, but the functional dependency
PID ! Name,Budget holds (so the relation is not normalized). Consider the query.
SELECT P.Budget, P.Name, E.Name
FROM Employee E, Project P
WHERE E.SSN = P.SSN AND
P.Budget > 99 AND
E.Name = 'John'
ORDER BY P.Budget
Assume the following statistical information:
10,000 tuples in Employee relation
20,000 tuples in Project relation
40 tuples/page in each relation
10-page bu er
1,000 di erent values for E.Name
The domain of Budget consists of integers in the range of 1 to 100
Indices:
? Employee relation:
On Name: Unclustered, hash
? Project relation:
On SSN: Unclustered, hash
On Budget: Clustered, 2-level B+ tree
Question: Find the best execution plan, draw it, and estimate its cost.
?To bridge the gap between a database and the Internet, it is necessary to use a _____, which is software that integrates different applications and allows them to exchange data.
A. ?middleware B. ?stack C. ?server D. ?firmware