What is a shared lock in programming?

Can you explain what a shared lock is in programming?

A shared lock allows multiple transactions to read a resource simultaneously, but not modify it.

How does it differ from an exclusive lock?

An exclusive lock prevents any other transaction from accessing the resource, while a shared lock allows concurrent reads.

When would I use a shared lock?

You would use a shared lock when you need to read data without the risk of it being changed by others.

Can you give an example of a situation using a shared lock?

Sure! In a database, if multiple users are querying data for reports, a shared lock allows them to read without interference.