Author Question: Which is the primary key(s) in the following STUDENT_GRADE(StudentID, CourseID, Grade)? A) ... (Read 47 times)

serike · **on:** Jul 7, 2018

Which is the primary key(s) in the following STUDENT_GRADE(StudentID, CourseID, Grade)?

A) STUDENT_GRADE
B) StudentID
C) CourseID
D) StudentID, CourseID
E) Grade

Question 2

Which of the following is an example of a horizontal-market application software?

A) a software developed by the IRS for its own needs
B) ArtRage, the iPad application
C) AutoCad
D) Microsoft Excel

Question 3

CPU speed is expressed in cycles called ________.

A) hertz
B) bytes
C) bits
D) pixels

l.stuut · **Reply #1 on:** Jul 7, 2018

Answer to Question 1

D
Explanation: D) The relation STUDENT_GRADE has a composite primary key.
CL

Answer to Question 2

Posted another one can you check that one too? Thanks.

Answer to Question 3

A