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RRB Junior Engineer / DMS / CMA 2019 · Question 3629 of 3719

In DBMS, isolation property is also called as ________.

  1. ASerializabilityCorrect
  2. BDurability
  3. CAtomicity
  4. DPerformance

Answer: A. Serializability

Explanation

The correct option is (1) Explanation:- Isolation:- Isolation is defined at the database level as a property that controls how or when changes are made, and if they become visible to each other, users, and systems. It is also called Serializability. Key Points The serializable isolation level provides the strictest transaction isolation. One of the goals of isolation is to allow multiple transactions to occur at the same time without adversely affecting the execution of each. Isolation is the separation of resources or data modification made by different transactions. The concurrency control system is responsible for ensuring isolation in a database system. Additional Information Durability: - It is the ability to endure expected conditions over time. It is a type of quality and reliability that is associated with long lasting items that don't break with stress. For example , A spacecraft that can endure the stresses of multiple launches and reentries to be reused over the course of several decades. Atomicity:- The all or none policy is commonly referred to as atomicity. It ensures that a work is either completed or not completed and there are no intermediate stages. Performance:- The performance of accessing and modifying data in the database can be improved by the proper allocation and application of resources.

Source: RRB JE 2019 (CBT 2) (IT) Previous Year Paper (30 Aug 2019) — prepp.in solved-paper PDF (answer key with explanations) · reliable-secondary

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