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Database Systems - Object Oriented Database Online Exam Quiz

Important questions about Database Systems - Object Oriented Database. Database Systems - Object Oriented Database MCQ questions with answers. Database Systems - Object Oriented Database exam questions and answers for students and interviews.

ODL supports which of the following types of association relationships?

Options

A : Unary

B : Unary and Binary

C : Unary and Binary and Ternary

D : Unary and Binary

An extent is which of the following?

Options

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

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

Options

A : ABC123

B : course

C : course()

D : ABC123

Using ODL, you can define which of the following?

Options

A : Attribute

B : Structure

C : Operation

D : All of the above

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

Options

A : Class

B : Attribute

C : Relationship

D : Relationship

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

Options

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.

An atomic literal is which of the following?

Options

A : Strings

B : Boolean

C : Long

D : All of the above.

Which of the following is true concerning an ODBMS?

Options

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

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

Options

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 : To define a range for an attribute.

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

Options

A : Set

B : Bag

C : List

D : Bag

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

Options

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 a concrete class and a subclass.

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

Options

A : Set

B : Bag

C : List

D : List

A relationship should be specified how in the ODL?

Options

A : One direction starting with the first class

B : One direction starting with the second class

C : Neither direction

D : Both directions

Using OQL, you may do which of the following?

Options

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.

The Object Query Language is which of the following?

Options

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

ODL supports the abstract keyword for classes and operations.

Options

A : True

B : False

C :

D : False

The ODMG Object Model requires that a relationship be specified in both directions.

Options

A : True

B : False

C :

D : True

Before specifying a key for a class, you must specify its extent.

Options

A : True

B : False

C :

D : True

The Object Model supports different literal types, but does not support atomic literals, collection literals, and structured literals.

Options

A : True

B : False

C :

D : False

The ODMG Object Model supports only unary and binary relationships.

Options

A : True

B : False

C :

D : True

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