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Logical Database Design
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Question
If no multivalued attributes exist in a relation, then the relation is in what normal form?
Options
A. First normal form
B. Second normal form
C. Third normal form
D. Fourth normal form
Correct Answer
First normal form
More questions
1. Which of the following is an SQL trigger supported by Oracle?
Options
A. BEFORE
B. INSTEAD OF
C. AFTER
D. All of the above.
Show Answer
Scratch Pad
Discuss
Correct Answer: All of the above.
2. The primary mechanism for providing context for data is metadata.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: True
3. Data scrubbing is which of the following?
Options
A. A process to reject data from the data warehouse and to create the necessary indexes
B. A process to load the data in the data warehouse and to create the necessary indexes
C. A process to upgrade the quality of data after it is moved into a data warehouse
D. A process to upgrade the quality of data before it is moved into a data warehouse
Show Answer
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Discuss
Correct Answer: A process to upgrade the quality of data before it is moved into a data warehouse
4. The entity integrity rule states that:
Options
A. no primary key attribute may be null.
B. no primary key can be composite.
C. no primary key may be unique.
D. no primary key may be equal to a value in a foreign key.
Show Answer
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Discuss
Correct Answer: no primary key attribute may be null.
5. Replication may use either synchronous or asynchronous distributed database technologies, although asynchronous technologies are more typical in a replicated environment.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: True
6. When three or more AND and OR conditions are combined, it is easier to use the SQL keyword(s):
Options
A. LIKE only.
B. IN only.
C. NOT IN only.
D. Both IN and NOT IN.
Show Answer
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Discuss
Correct Answer: Both IN and NOT IN.
7. Static extract is used for ongoing warehouse maintenance.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: False
8. 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.
Show Answer
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Discuss
Correct Answer: They have the ability to store complex data types on the Web.
9. Which of the following statements is true concerning routines and triggers?
Options
A. Both consist of procedural code.
B. Both have to be called to operate.
C. Both run automatically.
D. Both are stored in the database.
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Discuss
Correct Answer: Both consist of procedural code.
10. With SQL Server, parameters and variables in T-SQL start with the "%" sign.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: False
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