The file type ____ is a Word 2010 document.
A. .doc
B. .docx
C. .dot
D. .doct
Answer: B
Computer Science & Information Technology
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Use the schema R in the following questions:
R = (ABCDEFGH, {BE ? GH, G ? FA, D ? C, F ? B})
(a) What is a key of R?
(b) What is the attribute closure of GH ?
(c) Can there be a key that does not contain D? If such a key exists, give it; otherwise explain why it is not possible.
(d) Is the schema in BCNF? Give the reason for your answer.
(e) Use one cycle of the BCNF synthesis algorithm to decompose R into two sub-relations. For each sub-relation, explain whether or not it is in BCNF.
(f) Give the general condition that guarantees that a decomposition is lossless. Apply the condition to your decomposition to show whether or not it is lossless.
(g) Give the general condition that guarantees that a decomposition is dependency preserv- ing. Apply the condition to your decomposition to show whether or not it is dependency preserving.
(h) * Consider a schema (R, ), where R is a set of attributes and is a set of functional dependencies. Assume further that
Computer Science & Information Technology
Headings named Series 1, Series 2, and Series 3 located on the Excel worksheet display in the legend of the resulting chart
Indicate whether the statement is true or false
Computer Science & Information Technology
In conditional formatting what happens if the cell value does not pass the logical test?
A. The cell is formatted however you have determined for the FALSE result. B. The cell is formatted with Excel's default FALSE format. C. The cell is not formatted. D. A small green triangle displays in the top-left corner of the cell.
Computer Science & Information Technology
Which of the following would occur at the application layer of the OSI model?
A. UDP B. FTP C. TCP D. SPX
Computer Science & Information Technology