DBI202 - FA20 (QUIZ 1, 2, 4, 5) QUESTIONS WITH CORRECT ANSWERS|100% verified

DBI202 - FA20 (QUIZ 1, 2, 4, 5) QUESTIONS WITH CORRECT ANSWERS Of the various database models, the _______ model is the most prevalent today a. relational b. hierarchical c. linked list d. network CORRECT ANSWER A Each column in a relation is called _______. Select one: a. a tuple b. an attribute c. an attitude d. a union CORRECT ANSWER B Each row in a relation is called _______. Select one: a. an attitude b. a tuple c. an attribute d. a union CORRECT ANSWER B A unary operator is applied to _______ relation(s) and creates an output of ________ relation(s). Select one: a. two, two b. two, one c. one, one d. one, two CORRECT ANSWER D A binary operator is applied to _______ relations (s) and creates an output of ________ relation(s). Select one: a. one, one b. two, two c. two, one d. one, two CORRECT ANSWER C The unary _______ operation always results in a relation that has exactly one more row than the original relation.