In practice, why would tables that have duplicate rows be allowed?
What will be an ideal response?
It is not uncommon for a table that is returned as the result of a data manipulation operation, such as a query, to contain duplicate rows. This is often tolerated because of the processing time necessary for the DBMS to search the table to find and eliminate duplicate rows. This is especially true if the table is very large. In these cases, it is often acceptable to allow the duplicate rows to exist.
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Two popular techniques used to assess internal consistency are:
a. split-half tests and coefficient alpha. b. split-half tests and the equivalent form technique c. the equivalent form technique and coefficient alpha d. the test-retest technique and the equivalent form technique e. the test-retest technique and split-half tests