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Object-Oriented Database Questions

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Choose the correct option.

Database objects are almost always transient.


ATRUE

BFALSE

Answer: Option B

Explanation:

Here is no explanation for this answer

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The term Incomplete for a UML has the same meaning as which of the following for an EER diagram?


AOverlapping rule

BDisjoint rule

CTotal specialization rule

DPartial specialization rule

Answer: Option D

Explanation:

Here is no explanation for this answer

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A relationship should be specified how in the ODL?


AOne direction starting with the first class

BOne direction starting with the second class

CNeither direction.

DBoth directions.

Answer: Option D

Explanation:

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ODL supports which of the following types of association relationships?


AUnary

BUnary and Binary

CUnary and Binary and Ternary

DUnary and Binary and Ternary and higher

Answer: Option B

Explanation:

Here is no explanation for this answer

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The ODMG Object Model supports only unary and binary relationships.


ATRUE

BFALSE

Answer: Option A

Explanation:

Here is no explanation for this answer

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


AUsed to develop logical schemas

BA data definition language for OODB

CA method to implement a logical schema

DAll of the above.

Answer: Option D

Explanation:

Here is no explanation for this answer

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


AManager is a concrete class and a superclass.

BManager is a concrete class and a subclass.

CManager is an abstract class and a superclass.

DManager is an abstract class and a subclass.

Answer: Option B

Explanation:

Here is no explanation for this answer

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Which of the following is a technique for hiding the internal implementation details of an object?


AEncapsulation

BPolymorphism

CInheritance

DAll of the above.

Answer: Option A

Explanation:

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A derived element is typically shown by placing either a slash (/) or a stereotype of <> before the name of the element


ATRUE

BFALSE

Answer: Option A

Explanation:

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Using ODL, you can define which of the following?


AAttribute

BStructure

COperation

DAll of the above.

Answer: Option D

Explanation:

Here is no explanation for this answer

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