Conflicting Operations
Conflicting operations refer to operations that access or modify the same data item in a concurrent manner. In other words, they are operations that may potentially interfere with each other and result in inconsistent or incorrect data.

Transactions
Transactions are units of work that consist of one or more operations. They are executed concurrently in a multi-user database system. Transactions ensure the consistency and integrity of data by following the ACID properties (Atomicity, Consistency, Isolation, Durability).

Operations by Different Transactions
In this scenario, we have two transactions, I and J, that perform operations on the same data item. These operations can be read or write operations.

At Least One Write Operation
The given condition states that at least one of the operations performed by transactions I and J is a write operation. A write operation modifies the data item, whereas a read operation only accesses the data item without making any changes.

Explanation
If at least one of the operations is a write operation, it means that the data item is being modified by one of the transactions. This creates a potential conflict between the two transactions.

If both transactions perform read operations on the same data item, there is no conflict because read operations do not modify the data. However, if one transaction performs a write operation and another transaction performs either a read or write operation on the same data item, a conflict arises.

Conflicting operations can lead to data inconsistencies and incorrect results. For example, if transaction I writes a new value to the data item and transaction J reads the data item before the write operation is committed, J will retrieve an outdated value.

To ensure data consistency and integrity, conflicting operations need to be carefully managed. This can be achieved through mechanisms such as locking, concurrency control, and transaction isolation levels.

Therefore, the correct answer is option 'A' - Conflicting.