MongoDB Mastering MongoDB for Beginners (Theory and Projects) - $inc operator - `2

The video tutorial explains the use of the increment operator in MongoDB, which can be used to both increase and decrease values. It highlights the absence of a dedicated decrement operator in MongoDB, necessitating the use of the increment operator with negative values to decrease quantities. A practical example is provided to demonstrate how to decrement a quantity by using the increment operator with a negative value. The tutorial concludes with observations on the flexibility of the increment operator in MongoDB.

What is the primary function of the increment operator in MongoDB?

• To only decrease values

• To both increase and decrease values

• To reset values to zero

• To only increase values

How can you decrease a value using the increment operator in MongoDB?

• By using a decrement operator

• By using a negative value with the increment operator

• By using a special decrease function

• By setting the value to zero first

In the example provided, what is the ID of the document being updated?

• 3

• 2

• 4

• 1

What happens when you use a negative number with the increment operator?

• The value is increased

• The value is decreased

• The value is reset

• The operation is invalid

Why might MongoDB not have a dedicated decrement operator?

• Because it is a new feature

• Because it is unnecessary in databases

• Because decrementing is not supported

• Because the increment operator can handle both operations