Multi Step Processes easy
A user registration process involves two steps: inserting a row into the 'Users' database table and inserting a row into the 'Profiles' table. If the first insert succeeds but the second fails, the database is left in an inconsistent state. What mechanism prevents this?
- A Database Transaction (Commit/Rollback)
- B Data Replication
- C Write-Ahead Logging
- D Database Indexing
Answer: A. Database Transaction (Commit/Rollback)
Transactions ensure Atomicity (the 'A' in ACID). By wrapping both inserts in a transaction, the database guarantees that either both happen, or neither happens (Rollback), preventing partial data.
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