The select operation
A) combines relational tables to provide the user with more information than is otherwise available.
B) creates a subset consisting of columns in a table.
C) identifies the table from which the columns will be selected.
D) creates a subset consisting of all records in the file that meet stated criteria.
E) creates a subset consisting of rows in a table.
D
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When there is a proven relationship between a selection device and some relevant criterion, that device is said to be ________
A) valid B) fair C) reliable D) equal E) just
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The most common LAN medium is unshielded twisted-wire pair (UTP)
Indicate whether the statement is true or false
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