1 ACTOR PRODUCER 1 ACTOR ALSO_A_ DIRECTOR 1 DIRECTOR PRODUCER M 2 PERFORMS_IN LEAD ROLE M b) Some actors have done a lead role in multiple movies. c) A movie can have a minimum of two lead actors. N d) Every director has been an actor in some movie. N MOVIE 1 a) There are some actors who have acted in more than ten movies. PRODUCES Assume that MOVIES is a populated database. ACTOR is used as a generic term and includes actresses. Given the constraints shown in the ER schema, respond to the following statements with True, False, or Maybe. Assign a response of Maybe to statements that, although not explicitly shown to be True, cannot be proven False based on the schema as shown. Justify each answer. N DIRECTS N

1 ACTOR PRODUCER 1 ACTOR ALSO_A_ DIRECTOR 1 DIRECTOR PRODUCER M 2 PERFORMS_IN LEAD ROLE M b) Some actors have done a lead role in multiple movies. c) A movie can have a minimum of two lead actors. N d) Every director has been an actor in some movie. N MOVIE 1 a) There are some actors who have acted in more than ten movies. PRODUCES Assume that MOVIES is a populated database. ACTOR is used as a generic term and includes actresses. Given the constraints shown in the ER schema, respond to the following statements with True, False, or Maybe. Assign a response of Maybe to statements that, although not explicitly shown to be True, cannot be proven False based on the schema as shown. Justify each answer. N DIRECTS N

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

1
ACTOR
PRODUCER
ACTOR
1
ALSO_A_
DIRECTOR
DIRECTOR
PRODUCER
M
2
PERFORMS_IN
LEAD ROLE
M
b) Some actors have done a lead role in multiple movies.
c) A movie can have a minimum of two lead actors.
N
d) Every director has been an actor in some movie.
N
MOVIE
1
a) There are some actors who have acted in more than ten movies.
PRODUCES
Assume that MOVIES is a populated database. ACTOR is used as a generic term and includes
actresses. Given the constraints shown in the ER schema, respond to the following
statements with True, False, or Maybe. Assign a response of Maybe to statements that,
although not explicitly shown to be True, cannot be proven False based on the schema as
shown. Justify each answer.
N
DIRECTS
N

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