Question: Each time a change is made to a database, the database must be locked to ensure that conflicting changes arent made at the same time.

Each time a change is made to a database, the database must be locked to ensure that conflicting changes arent made at the same time. Each of these changes is called a transaction. Four characteristics of each transaction must always be maintained. These four properties are called ACID. Research online to find out what the acronym ACID stands for and give an example of why ACID compliance is important.

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