Explanation:Deadlock is a condition that can occur on any system with multiple threads, not just on a relational database management system. 3. ______________ allow concurrent transactions to read (SELECT) a resource.
A. Update locks
B. Shared locks
C. Exclusive Locks
D. All of the mentioned
Answer:A
Explanation:Deadlock is a condition that can occur on any system with multiple threads, not just on a relational database management system. 3. ______________ allow concurrent transactions to read (SELECT) a resource.
A. Update locks B. Shared locks C. Exclusive Locks D. All of the mentioned
Explanation:Shared (S) locks on a resource are released as soon as the data has been read. 4. Which is the most restrictive isolation level in transaction ?