It Is Possible for Local DBMSs to Commit Updates at Some

question 44

Multiple Choice

It is possible for local DBMSs to commit updates at some sites and undo updates at other sites. How can this inconsistency be prevented?

• A) using a two-step rollback
• B) using a two-phase commit
• C) using a two-phase rollback
• D) using a two-phase transaction

---

Definitions:

Proportional Tax

A taxation system where the tax rate remains constant regardless of the amount subject to tax.

Lump-Sum Tax

A tax of a fixed amount that does not vary with the taxpayer's income or activities.

Marginal Tax Rate

The tax rate that applies to the next dollar of taxable income, indicating how much of any additional income will be taken in taxes.

Sales Tax

A consumption tax imposed by the government on the sale of goods and services.