Which of the following DBMS evaluation categories does the following question relate to: What is the unit that may be locked and are exclusive locks the only ones permitted?
A) Concurrent update
B) Data recovery
C) Data dictionary
D) Security

Question

Quizplus · Accepted Answer

The question pertains to concurrent update, which deals with managing concurrent transactions accessing the database without conflict. The issue of locking units (such as records or tables) to prevent multiple transactions from modifying the same data simultaneously is a critical aspect of concurrent update. The question specifically mentions exclusive locks, which means that other transactions are prevented from accessing the locked unit until the lock is released. Therefore, the best answer is A) Concurrent update.

Which of the Following DBMS Evaluation Categories Does the Following