Object Oriented Database - MCQ Questions and answers- Technical Aptitude

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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.

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

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

A) Set B) Bag C) List D) Dictionary

Discuss

Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

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

Discuss

Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

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.

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Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

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

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

ODL supports the abstract keyword for classes and operations.

A) True B) False

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Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

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

A) True B) False

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

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

A) True B) False

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Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

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

A) True B) False

Discuss

Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

The ODMG Object Model supports only unary and binary relationships.

A) True B) False

Discuss

Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

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