Question

Assume that two students are trying to register for a course in which there is only one open seat. What component of a database system prevents both students from being given that last seat?

Answer 1

The component of the database that prevents both students from getting the last seat is: transaction isolation

Data that enters the database are expected to maintain accuracy and also be consistent with the database structure.

So, when both students request for the last seat, the possibilities are:

• Student A gets the seat
• Student B gets the seat

The following is not a possibility

• Both students get the seat
• None of the students gets the seat

The above highlights means that, only one of the students would get the seat.

This is possible because of the concept called transaction isolation.

The transaction isolation ensures that the data requested by a user is complete and such data maintains competency.

So, when a student gets the last seat, the next student would not get the same seat (or any other seat), because a transaction has already been completed.

Read more about transaction isolation at:

brainly.com/question/13030145

Answer 2

Answer:

Transaction isolation

Explanation:

The student that has initiated the transaction before the other one will be given the seat. The database will be locked for the second student during the period of transaction of the first student. The transaction isolation level is a state within databases that specifies the amount of data that is visible to a statement in a transaction, specifically when the same data source is accessed by multiple transactions simultaneously.