Question 17
In the hierarchy of Boolean operators, OR takes precedence over both AND and NOT.
True
False
Question 18
The best way to retrieve a complete list of relevant material is by conducting a subject search within a database.
True
False
Question 19
Search engines use controlled vocabulary or subject headings to categorize records in their database.
True
False
Expert Answer
Ans.17) In the hierarchy of Boolean operators, OR takes precedence over both AND and NOT.
False
Explanation: In the Boolean algebra, the NOT operator is highest in the hierarchy of the precedence rules, followed by the AND and OR operators.
Ans.18) The best way to retrieve a complete list
OR
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OR
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