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Question 1

Consider the Orders relation shown in the exhibit. Which of the following SQL statements would replace the value in the Sales_Rep_No column with 110 everywhere that Sales_Rep_No 108 is listed?

Options :

A : UPDATE Sales_Rep_No IN Orders SET(Sales_Rep_No = 110 WHERE Sales_Rep_No = 108);

B : UPDATE Orders SET Sales_Rep_No = 110 WHERE Sales_Rep_No = 108;

C : UPDATE Orders SET Sales_Rep_No = 110;

D : UPDATE Orders WHERE Sales_Rep_No = 108 SET Sales_Rep_No = 110;

Answer: B

Question 2

Consider the entity-relationship (ER) diagram shown in the exhibit. What do the characters at the ends of the connecting line indicate?

Options :

A : Degree of a relation

B : Cardinality of a relation

C : Primary key of a relation

D : Determinant of a relation

Answer: B

Question 3

What improvement can be made to file-based databases to overcome their limitations?

Options :

A : Implement a tabular structure.

B : Gather files in a distributed repository

C : Use a hierarchical database file system.

D : Tightly couple database structure to database application programs.

Answer: A

Question 4

Consider the following relational algebraic expression as well as the Employee and Department relations shown in the exhibit: Which of the following relations would result from the given relational algebraic expression?