In a multiuser database environment, what is a deadlock?

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Question: In a multiuser database environment, what is a deadlock?

Options:

Correct Answer: A situation where two transactions are waiting for each other to release locks

Solution:

A deadlock occurs when two transactions are waiting for each other to release locks, preventing both from proceeding.

In a multiuser database environment, what is a deadlock?

In a multiuser database environment, what is a deadlock?

Step 1: Imagine two people trying to cross a narrow bridge from opposite sides.
Step 2: Person A is on the bridge and wants to go to the other side, but they can't move because Person B is in the way.
Step 3: Person B is also on the bridge and wants to go to the other side, but they can't move because Person A is blocking them.
Step 4: Both people are stuck because they are waiting for each other to move, and neither can go forward.
Step 5: In a database, a deadlock is similar; two transactions are waiting for each other to finish using resources (like locks), and neither can continue.

Deadlock – A situation in a multiuser database where two or more transactions are unable to proceed because each is waiting for the other to release a lock.