Please refer to the following diagram for Q19 to Q20. PERSON PK P_ID P_LNAME P_FNAME ΕMPLOYΕ P_ID EMP_HIRE_DATE STUDENT P ID STUDY ΜAIOR PK, FK1 PK, FK1 19. Which of the following statements is/are true? (1) A Person must be either a Student or an Employee. (2) A Person can neither be a Student nor an Employee. (3) A Person must be a Student or an Employee or both. a. (1) only b. (3) only c. (1) and (2) only d. (1), (2) and (3).
Please refer to the following diagram for Q19 to Q20. PERSON PK P_ID P_LNAME P_FNAME ΕMPLOYΕ P_ID EMP_HIRE_DATE STUDENT P ID STUDY ΜAIOR PK, FK1 PK, FK1 19. Which of the following statements is/are true? (1) A Person must be either a Student or an Employee. (2) A Person can neither be a Student nor an Employee. (3) A Person must be a Student or an Employee or both. a. (1) only b. (3) only c. (1) and (2) only d. (1), (2) and (3).
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Transcribed Image Text:Please refer to the following diagram for Q19 to Q20.
PERSON
PK P_ID
P_LNAME
P_FNAME
ΕMPLOYΕ
P_ID
EMP_HIRE_DATE
STUDENT
P ID
STUDY ΜAIOR
PK, FK1
PK, FK1
19.
Which of the following statements is/are true?
(1) A Person must be either a Student or an Employee.
(2) A Person can neither be a Student nor an Employee.
(3) A Person must be a Student or an Employee or both.
a. (1) only
b. (3) only
c. (1) and (2) only
d. (1), (2) and (3).
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