 
			 
			MCQOPTIONS
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				| 1. | What does the “x” operator do in relational algebra? | 
| A. | Output specified attributes from all rows of the input relation. Remove duplicate tuples from the output | 
| B. | Output pairs of rows from the two input relations that have the same value on all attributes that have the same name | 
| C. | Output all pairs of rows from the two input relations (regardless of whether or not they have the same values on common attributes) | 
| D. | Returns the rows of the input relation that satisfy the predicate | 
| Answer» D. Returns the rows of the input relation that satisfy the predicate | |