Concurrency interview questions

1. A.the strategy that allows simultaneous edits and detects conflicts only at save time rather than locking rows up front
2. B.a property checked in the update predicate so a save fails if another writer changed the row since it was read
3. C.the error thrown when a save affects fewer rows than expected because a tracked row was changed or removed by someone else
4. D.a database-managed binary value that changes on every update, commonly used as an automatic conflict-detection token

Answer + AI explanation with Pro

1. A.rowversion
2. B.concurrency token
3. C.DbUpdateConcurrencyException
4. D.optimistic concurrency

Answer + AI explanation with Pro

1. A.optimistic concurrency — the error thrown when a save affects fewer rows than expected because a tracked row was changed or removed by someone else
2. B.optimistic concurrency — a database-managed binary value that changes on every update, commonly used as an automatic conflict-detection token
3. C.optimistic concurrency — a property checked in the update predicate so a save fails if another writer changed the row since it was read
4. D.optimistic concurrency — the strategy that allows simultaneous edits and detects conflicts only at save time rather than locking rows up front

Answer + AI explanation with Pro

1. A.the error thrown when a save affects fewer rows than expected because a tracked row was changed or removed by someone else
2. B.a database-managed binary value that changes on every update, commonly used as an automatic conflict-detection token
3. C.a property checked in the update predicate so a save fails if another writer changed the row since it was read
4. D.the strategy that allows simultaneous edits and detects conflicts only at save time rather than locking rows up front

Answer + AI explanation with Pro

1. A.concurrency token
2. B.optimistic concurrency
3. C.rowversion
4. D.DbUpdateConcurrencyException

Answer + AI explanation with Pro

1. A.concurrency token — a database-managed binary value that changes on every update, commonly used as an automatic conflict-detection token
2. B.concurrency token — a property checked in the update predicate so a save fails if another writer changed the row since it was read
3. C.concurrency token — the error thrown when a save affects fewer rows than expected because a tracked row was changed or removed by someone else
4. D.concurrency token — the strategy that allows simultaneous edits and detects conflicts only at save time rather than locking rows up front

Answer + AI explanation with Pro

1. A.a property checked in the update predicate so a save fails if another writer changed the row since it was read
2. B.a database-managed binary value that changes on every update, commonly used as an automatic conflict-detection token
3. C.the error thrown when a save affects fewer rows than expected because a tracked row was changed or removed by someone else
4. D.the strategy that allows simultaneous edits and detects conflicts only at save time rather than locking rows up front

Answer + AI explanation with Pro

1. A.DbUpdateConcurrencyException
2. B.concurrency token
3. C.optimistic concurrency
4. D.rowversion

Answer + AI explanation with Pro

1. A.rowversion — the strategy that allows simultaneous edits and detects conflicts only at save time rather than locking rows up front
2. B.rowversion — the error thrown when a save affects fewer rows than expected because a tracked row was changed or removed by someone else
3. C.rowversion — a property checked in the update predicate so a save fails if another writer changed the row since it was read
4. D.rowversion — a database-managed binary value that changes on every update, commonly used as an automatic conflict-detection token

Answer + AI explanation with Pro

1. A.a database-managed binary value that changes on every update, commonly used as an automatic conflict-detection token
2. B.a property checked in the update predicate so a save fails if another writer changed the row since it was read
3. C.the strategy that allows simultaneous edits and detects conflicts only at save time rather than locking rows up front
4. D.the error thrown when a save affects fewer rows than expected because a tracked row was changed or removed by someone else

Answer + AI explanation with Pro

1. A.concurrency token
2. B.optimistic concurrency
3. C.DbUpdateConcurrencyException
4. D.rowversion

Answer + AI explanation with Pro

1. A.DbUpdateConcurrencyException — a property checked in the update predicate so a save fails if another writer changed the row since it was read
2. B.DbUpdateConcurrencyException — a database-managed binary value that changes on every update, commonly used as an automatic conflict-detection token
3. C.DbUpdateConcurrencyException — the strategy that allows simultaneous edits and detects conflicts only at save time rather than locking rows up front
4. D.DbUpdateConcurrencyException — the error thrown when a save affects fewer rows than expected because a tracked row was changed or removed by someone else

Answer + AI explanation with Pro