Discussion
Home ‣ Database ‣ Object-Oriented Database Comments
- Question
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 an abstract class and a subclass.
- Correct Answer
- Manager is a concrete class and a subclass.
- 1. Identify the class name for the following code: ABC123 course();
Options- A. ABC123
- B. course
- C. course()
- D. All of the above. Discuss
- 2. 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. Discuss
- 3. An atomic literal is which of the following?
Options- A. Strings
- B. Boolean
- C. Long
- D. All of the above. Discuss
- 4. 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. Not similar to SQL Discuss
- 5. 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. Discuss
- 6. 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. Only one instance of a class within a database Discuss
- 7. 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. All of the above. Discuss
- 8. 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 and Ternary and higher Discuss
- 9. Using ODL, you can define which of the following?
Options- A. Attribute
- B. Structure
- C. Operation
- D. All of the above. Discuss
- 10. A view is which of the following?
Options- A. A virtual table that can be accessed via SQL commands
- B. A virtual table that cannot be accessed via SQL commands
- C. A base table that can be accessed via SQL commands
- D. A base table that cannot be accessed via SQL commands Discuss
Object-Oriented Database problems
Search Results
Correct Answer: ABC123
Correct Answer: All of the above.
Correct Answer: All of the above.
Correct Answer: Similar to SQL and uses a select-from-where structure
Correct Answer: All of the above.
Correct Answer: The set of all instances of a class within a database
Correct Answer: They have the ability to store complex data types on the Web.
Correct Answer: Unary and Binary
Correct Answer: All of the above.
Correct Answer: A virtual table that can be accessed via SQL commands
Comments
There are no comments.More in Database:
Programming
Copyright ©CuriousTab. All rights reserved.