In the following diagram, which answer is true?

In the following diagram, which answer is true?
 
  A) Each employee can supervise one to many employees.
  B) Each employee can manage many departments.
  C) Each employee works in more than one department.
  D) All of the above.

 Q. 2

Referring to the figure below, which of the following is NOT true?
 
  A) A component is part of an item.
  B) A component is always used in only one item.
  C) A component can be part of an item.
  D) A component may be used in many items.

 Q. 3

In the figure below, what type of key is depicted?
 
  A) Primary
  B) Recursive primary
  C) Composite
  D) Recursive foreign

 Q. 4

In the figure below, what type of relationship is depicted?
 
  A) One-to-one
  B) Unary
  C) One-to-many
  D) Many-to-many

 Q. 5

In the following diagram, which of the answers below is true?
 
  A) Each patient has one or more patient histories.
  B) Each patient has one and only one visit.
  C) Each patient history belongs to one and only one patient.
  D) Both A and C

 Q. 6

Any create command may be reversed by using a ________ command.
 
  A) truncate
  B) drop
  C) delete
  D) unpack

 Q. 7

For the relationship represented in the figure below, which of the following is true?
 
  A) An employee can work in more than one department but does not have to work for any department.
  B) A department must have at least one employee.
  C) A department can have more than one employee.
  D) An employee has to work for more than one department.