60 free practice questions with explanations…
In the world of data engineering and warehousing projects, the concept of ACID transactions is crucial to ensure data consistency and reliability. ACID transactions refer to a set of properties that guarantee database transactions are processed reliably and consistently. ACID stands for Atomicity , Consistency , Isolation , and Durability . Atomicity : This property ensures that a transaction is treated as a single, indivisible unit of work. Either the entire transaction completes successfully, or none of it does. If any part of the transaction fails, the entire transaction is rolled back, and the database is returned to its state before the transaction began. Consistency : This property ensures that the transaction leaves the database in a valid state. The database must enforce any constraints or rules set by the schema. For example, if a transaction tries to insert a record with a duplicate primary key, the database will reject the transaction and roll back any changes that have alre...
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