Exam 18: Object Database Management Systems

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In the relational DBMS augmented with BLOBs:

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There is a request to insert a row into table Tc with values 10,20,30 respectively for ax,bp,cm.Which of the following will take place?

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There is a request to insert a row in Tb with values 4,3 respectively for ax and bp.Which of the following will take place?

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CLASS Employee { //Variables String LastName; String FirstName; Real HourlyRate; Integer HoursWorked; Date HireDate; String Job; //Methods Real Salary(); String GetLastName(); String GetFirstName(); String GetJob();} -If the type of the data HoursWorked is changed from integer to real,the following will need to be changed:

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For object-oriented DBMSs,the two languages that are the counterpart for SQL in relational DBMSs are ________________________ and __________________________.

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When an object receives a request to execute a method,if the object's class does not contain that method,the request is forwarded to the parent class for execution.

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In addition to user-defined types,object relational databases support other object features such as subtable families,and array and row data types.

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In SQL:1999,the keyword ________________ in a method definition indicates that the child method being defined overrides the definition in the parent type.

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One of the fundamental principles of object-oriented computing is _________________,which means that an object can only be accessed through its interface.

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Which of the following applications is supported by a relational DBMS?

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Class reusability and data independence are two of the benefits of encapsulation.

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An object-oriented DBMS is a good choice for traditional business applications that require ad hoc query capabilities,query optimization,and efficient transaction support.

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Which of the following is not supported by Oracle 9i:

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In both the large object architecture and the specialized media server architecture,SQL queries are used to retrieve and display complex data.

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The object relational DBMS architecture contains a(n)____________________,which includes a parser to decompose references to expressions containing user-defined types and functions,and an optimizer to optimize these references.

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The need to integrate complex data,such as images,audio and video,with simple data,such as dates and numbers,is the driving force behind object database technology.

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Which of the following statements does not apply to today's object relational DBMS?

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There is only one row with value ax = 100 in Ta.If there is a request to delete that row,which of the following is true?

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An implicit method of a user-defined type used to create an empty instance of that type is called a(n)_________________ method.

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In the object relational approach,complex data such as video data are not processed through commands of the database language.

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