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Answer the following general questions about indexes:
a. Can an index be built over a non-unique field?
b. Can an index be built over a field if the file is not stored in sequence by that field?
c. Can an index be built over a combination of fields as well as over a single field?
d. Is there a limit to the number of indexes that can be built for a file?
e. How is an index affected when a change is made to a file? Does every change to a file affect every one of its indexes?
f. Can an index be used to achieve sequential access?
What are the things you should consider in making this decision, and based on your choice, what would be your follow-up actions?
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What is a mantrap? How should it be used?
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Why is the need for data conversion transformations?
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