CSE 511 Week 1 Exam Questions With
Verified And Updated Answers
What is the role of a relationship in a database? - answer✔It connects two entities.
Which of the following can be an entity name in a database?
- Gender
- Student
- First Name
- Age - answer✔Student can be an entity name because it is an object with multiple
characteristics, such as name, address, phone number, etc.
What is required in order to use the cartesian product operator on two relations? - answer✔It
can be applied to any two relations without a requirement.
Consider two relations A and B in a database. Relation A has 5 rows and relation B has 3 rows.
How many rows are produced if we apply the cartesian product operation to A and B? -
answer✔15 b/c The number of rows created by the cartesian product is found by multiplying
the number of rows in each relation. The new table should have the columns of BOTH previous
tables
Which mathematical operator must be used in order to display information about students who
are majoring in Computer Science but not in Electrical Engineering? - answer✔Difference
Which statement about the selection operator is true? - answer✔It filters certain tuples in a
relation based on given criteria.
Which mathematical operator must be used in order to display information about students who
are majoring in both Computer Science and Electrical Engineering? - answer✔Intersection
Which mathematical operation must be completed before the ϴ-Join operation? -
answer✔Cartesian Product
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