The STL list class method that removes the object at a specified position is ____.
A. name.erase(begin, end)
B. name.erase(pos)
C. name.clear()
D. name.pop_back()
Answer: B
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The ________ architecture is designed to provide a simple, easy-to-implement, low-overhead tool to support a range of network services that are differentiated on the basis of performance.
A) DiffServ B) ISA C) SLA D) WFQ
The command [Alt-l] converts the word following the cursor to:
a: upper case b: lower case c: capitalized d: bold e: none of the above
Joysticks and steering wheels are examples of ________ controllers
Fill in the blank(s) with correct word
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.