A technique that can be used to compress data when a ____ compression is necessary is the Lempel-Ziv technique.?

A. ?random
B. ?run-length
C. ?lossy
D. ?lossless


Answer: D

Computer Science & Information Technology

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Pages in a database have P bytes. A table T has R rows and n integer attributes, A1, A2, .An. Each attribute is r bytes long. Assume that r is much greater than the size of a pointer, so the pointer size can be ignored when computing the size of an entry in an index. Assume that the domain of A1 is the integers between 1 and 100 and that the values of this attribute are randomly distributed in

the domain. Consider the following statement:

SELECT A2
FROM	T
WHERE A1 <= 50 AND A1 > 25
Evaluate the cost, in terms of the number of I/O operations, of executing the statement under the following conditions. In order to get credit you must explain your work clearly. (a) The table is stored as a heap (no indexes). (b) There is a non-integrated (separate index file) clustered index with search key A1. (c) There is an unclustered index with search key (A2, A1).

Computer Science & Information Technology

Office ________ provides access to the file-level commands, such as saving a file, as well as program options and account settings

Fill in the blank(s) with correct word

Computer Science & Information Technology

The ____________________ feature in Visual Basic allows you to create interactive reports and forms for many types of data.

Fill in the blank(s) with the appropriate word(s).

Computer Science & Information Technology

With the chart selected, click the ____________________ button to format a chart with an attractive style.

Fill in the blank(s) with the appropriate word(s).

Computer Science & Information Technology