CS403P midterm Quiz Solved by Munir
Option 1:
Question: Which of the two data models were used before the relational data model?
Option: Hierarchical and Network Data Model
Answer: Hierarchical and Network Data Model
Option 2:
Question: If a teacher teaches multiple courses in a university, then the relationship between teacher and course is:
Option: One to one
Answer: One to many
Option 3:
Question: Which of the following are unary operators?
Option: PROJECT and SELECT
Answer: PROJECT and SELECT
Option 4:
Question: Which of the following option is true for union commutative?
Option: AUB=BUA
Answer: AUB=BUA
Option 5:
Question: A cell of a table is the intersection of row and a ________.
Option: Column
Answer: Column
Option 6:
Question: Consider the following two sets: X = [a, b] Y = {1,3,5} Then the Cartesian product of A and B (i.e. XxY) will be equal to:
Option: {(a,1), (a,3), (a,5), (b,1), (b,3), (b,5)}
Answer: {(a,1), (a,3), (a,5), (b,1), (b,3), (b,5)}
Option 7:
Question: In the relational data model, composite attributes need to be represented as:
Option: Separate relation
Answer: Separate relation
Option 8:
Question: A relation named FACULTY contains the attributes FactId, FactName, FactDept and FactRank. Which of the query will be used to PROJECT the FactId and FactDept?
Option: ∏ FactId, FactDept (Faculty)
Answer: ∏ FactId, FactDept (Faculty)
Option 9:
Question: While converting Entity-Relationship Diagram to Relational Data Model, each entity type is converted into:
Option: Relation
Answer: Relation
Option 10:
Question: Which of the following option is true for union commutative?
Option: AUB=BUA
Answer: AUB=BUA
