Object-Oriented Database

Q1: The object definition language (ODL) is which of the following?

A Used to develop logical schemas

B A data definition language for OODB

C A method to implement a logical schema

D All of the above.

Q2: An atomic literal is which of the following?

A Strings

B Boolean

C Long

D All of the above.

Q3: An extent is which of the following?

A A keyword that indicates that the subclass inherits from a superclass

B A keyword that indicates that the superclass inherits from a subclass

C The set of all instances of a class within a database

D Only one instance of a class within a database

Q4: Which of the following is an ordered collection of elements of the same type?

A Set

B Bag

C List

D Dictionary

Q5: Using OQL, you may do which of the following?

A Return an entire collection of elements including duplicates.

B Return a collection of elements without duplicates.

C Return a specific subset of elements using a given criteria.

D All of the above.

Q6: Identify the class name for the following code: ABC123 course();

A ABC123

B course

C course()

D All of the above.

Q7: The reserved word enum is used for which of the following?

A To define a range for an attribute.

B To define a range for a class.

C To define a range for a relationship.

D All of the above.

Q8: Which of the following is an unordered collection of elements that may contain duplicates?

A Set

B Bag

C List

D Dictionary

Q9: ODL supports which of the following types of association relationships?

A Unary

B Unary and Binary

C Unary and Binary and Ternary

D Unary and Binary and Ternary and higher

Q10: The keyword "inverse" is used in which of the following?

A Class

B Attribute

C Relationship

D All of the above.

Q11: Which of the following is true concerning the following statement: class Manager extends Employee

A Manager is a concrete class and a superclass.

B Manager is a concrete class and a subclass.

C Manager is an abstract class and a superclass.

D Manager is an abstract class and a subclass.

Q12: Using ODL, you can define which of the following?

A Attribute

B Structure

C Operation

D All of the above.

Q13: A relationship should be specified how in the ODL?

A One direction starting with the first class

B One direction starting with the second class

C Neither direction.

D Both directions.

Q14: The Object Query Language is which of the following"?

A Similar to SQL and uses a select-from-where structure

B Similar to SQL and uses a select-where structure

C Similar to SQL and uses a from-where structure

D Not similar to SQL

Q15: Which of the following is true concerning an ODBMS?

A They have the ability to store complex data types on the Web.

B They are overtaking RDBMS for all applications.

C They are most useful for traditional, two-dimensional database table applications.

D All of the above.


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