The colors displayed by an LCD monitor are made by combining which of the following colors?

A) Cyan, yellow, magenta, and black
B) Red, blue, and green
C) Green, blue, and yellow
D) Red, magenta, and blue

B

Computer Science & Information Technology

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LCD stands for ________ display

A) lumens and crystal B) liquid crystal C) laser compact D) liquid cathode

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Computer Science & Information Technology

_________ is a naming convention in which the prefixes indicate the type of data or type of object

Fill in the blank(s) with correct word

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Computer Science & Information Technology

Consider the following schema, where the keys are underlined (di?erent keys are underlined di?erently):

Professor(Id, Name, Department)
Course(CrsCode, Department, CrsName)
Teaching(ProfId, CrsCode, Semester)
Consider the following query: 
SELECT       C.CrsName, P.Name
FROM        Professor P, Teaching T, Course C
WHERE      T.Semester=’F1995’ AND P.Department=’CS’
                  AND P.Id = T.ProfId AND T.CrsCode=C.CrsCode
Assume the following statistical information: 1. 1000 tuples with 10 tuples per page in Professor relation 2. 20,000 tuples with 10 tuples per page in Teaching relation 3. 2000 tuples, 5 tuples per page, in Course 4. 5-page bu?er 5. 50 di?erent values for Department 6. 200 di?erent values for Semester 7. Indices Professor relation On Department: Clustered, 2-level B+ tree On Id: Unclustered, hash Course relation On CrsCode: Sorted (no index) On CrsName: Hash, unclustered Teaching relation On ProfId: Clustered, 2-level B+-tree On Semester, CrsCode: Unclustered, 2-level B+ tree a. First, show the unoptimized relational algebra expression that corresponds to the above SQL query. Then draw the corresponding fully pushed query tree. b. Find the best execution plan and its cost. Explain how you arrived at your costs.

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Computer Science & Information Technology

A(n) ________ generally appears at the bottom of slides and offers consistent text and/or graphics on each slide

Fill in the blank(s) with correct word

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Computer Science & Information Technology