Crucial Exams

ISC2 Certified Secure Software Lifecycle Professional (CSSLP) Practice Question

While designing the order-processing module of an e-commerce platform, you find that the persistence layer uses optimistic locking by keeping a version column in each order row. Under heavy load, frequent update conflicts cause users to repeat transactions. To reduce the risk of lost updates in this high-contention situation, which change would be most effective?

  • Adopt pessimistic concurrency by locking each row for update as soon as it is read, blocking other writers until the transaction commits.

  • Remove the version column and let the database accept the last update that arrives (last-write-wins).

  • Lower the transaction isolation level to READ UNCOMMITTED so concurrent updates proceed without blocking.

  • Replace row-level versioning with a single version counter for the entire table to apply optimistic locking at table scope.

ISC2 Certified Secure Software Lifecycle Professional (CSSLP)
Secure Software Implementation
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