Question

When does the save operation get called in MongoDB?

Option 1:
During the execution of the provided callback function.

Option 2:
After the 'Book1 successfully Added to DB' message is displayed.

Option 3:
When an error occurs in the provided callback function.

Option 4:
Before the execution of the provided callback function.

Answer 1

The save operation in MongoDB is called before the execution of the provided callback function, meaning that data is saved before any callback is processed.

Step-by-step explanation:

When working with MongoDB, the save operation is called before the execution of the provided callback function. This means that the correct answer is Option 4: Before the execution of the provided callback function.

Once the save operation is triggered, the callback function is then used for error handling or to perform actions after the save operation is complete, such as logging success messages.