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Database - Physical Database Design

Exercise : Physical Database Design - General Questions
6.
The blocking factor is:
a group of fields stored in adjacent memory.
the number of physical records per page.
attributes grouped together by the same primary key.
attributes grouped together by the same secondary key.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
Which of the following improves a query's processing time?
Write complex queries.
Combine a table with itself.
Query one query within another.
Use compatible data types.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
Which of the following are integrity controls that a DBMS may support?
Assume a default value in a field unless a user enters a value for that field.
Limit the set of permissible values that a field may assume.
Limit the use of null values in some fields.
All of the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
Which of the following is not a factor to consider when switching from small to large block size?
The length of all of the fields in a table row.
The number of columns
Block contention
Random row access speed
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
What is the best data type definition for Oracle when a field is alphanumeric and has a fixed length?
VARCHAR2
CHAR
LONG
NUMBER
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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