Free Oracle 1Z0-006 Exam Questions

Become Oracle Certified with updated 1Z0-006 exam questions and correct answers

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Total 352 Questions | Updated On: Dec 18, 2023

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Question 1

Why is it important to normalize entity relationships in a physical data model?

A : To improve data query performance

B : To eliminate data redundancy

C : To define primary and foreign key constraints

D : To enforce data type specifications

Answer: B

Question 2

What is the difference between a logical model and a physical model in database design?

A : A logical model is created by developers, while a physical model is created by database administrators.

B : A logical model focuses on performance optimization, while a physical model focuses on data integrity.

C : A logical model represents the database structure in terms of entities and relationships, while a physical model represents the actual implementation of the database.

D : A logical model is used for small-scale databases, while a physical model is used for large-scale databases.

Answer: C

Question 3

What is the purpose of denormalization in the physical model?

A : To define relationships between tables

B : To optimize database performance

C : To reduce data redundancy and inconsistency

D : To enforce data integrity constraints

Answer: B

Question 4

In a physical model, what is the purpose of denormalization?

A : To optimize the database for efficient querying

B : To reduce data redundancy and improve data integrity

C : To establish relationships between tables

D : To define the table structures and attributes

Answer: A

Question 5

What is the purpose of the COMMIT statement in SQL?

A : To delete data from a table

B : To make permanent changes to the database

C : To insert data into a table

D : To update data in a table

Answer: B

Page: 1 / 71

Total 352 Questions | Updated On: Dec 18, 2023

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