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MCQs

Total Questions : 46 | Page 1 of 5 pages
Question 1. ODL supports which of the following types of association relationships?
  1.    Unary
  2.    Unary and Binary
  3.    Unary and Binary and Ternary
  4.    Unary and Binary and Ternary and higher
 Discuss Question
Answer: Option B. -> Unary and Binary
Question 2. An extent is which of the following?
  1.    A keyword that indicates that the subclass inherits from a superclass
  2.    A keyword that indicates that the superclass inherits from a subclass
  3.    The set of all instances of a class within a database
  4.    Only one instance of a class within a database
 Discuss Question
Answer: Option C. -> The set of all instances of a class within a database
Question 3. Identify the class name for the following code: ABC123 course();
  1.    ABC123
  2.    course
  3.    course()
  4.    All of the above
 Discuss Question
Answer: Option A. -> ABC123
Question 4. Using ODL, you can define which of the following?
  1.    Attribute
  2.    Structure
  3.    Operation
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 5. The keyword "inverse" is used in which of the following?
  1.    Class
  2.    Attribute
  3.    Relationship
  4.    All of the above
 Discuss Question
Answer: Option C. -> Relationship
Question 6. The object definition language (ODL) is which of the following?
  1.    Used to develop logical schemas
  2.    A data definition language for OODB
  3.    A method to implement a logical schema
  4.    All of the above.
 Discuss Question
Answer: Option D. -> All of the above.
Question 7. An atomic literal is which of the following?
  1.    Strings
  2.    Boolean
  3.    Long
  4.    All of the above.
 Discuss Question
Answer: Option D. -> All of the above.
Question 8. Which of the following is true concerning an ODBMS?
  1.    They have the ability to store complex data types on the Web.
  2.    They are overtaking RDBMS for all applications.
  3.    They are most useful for traditional, two-dimensional database table applications.
  4.    All of the above.
 Discuss Question
Answer: Option A. -> They have the ability to store complex data types on the Web.
Question 9. The reserved word enum is used for which of the following?
  1.    To define a range for an attribute.
  2.    To define a range for a class.
  3.    To define a range for a relationship.
  4.    All of the above.
 Discuss Question
Answer: Option A. -> To define a range for an attribute.
Question 10. Which of the following is an unordered collection of elements that may contain duplicates?
  1.    Set
  2.    Bag
  3.    List
  4.    Dictionary
 Discuss Question
Answer: Option B. -> Bag

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