MongoDB Tutorial for Beginners (2022) - NOR Operator

The video tutorial explains the NOR operator in MongoDB, a logical operation used to select documents that do not meet any of the specified query conditions. It demonstrates how to connect to a MongoDB server, explore databases, and collections, and apply the NOR operator with various conditions. Examples are provided to show how documents are selected when conditions fail, and how the output changes when some conditions are met.

What is the primary function of the NOR operator in MongoDB?

• To select documents that meet all query expressions

• To select documents that fail all query expressions

• To select documents that meet at least one query expression

• To select documents that fail at least one query expression

In the practical example, which command is used to display all collections in the selected database?

• show Collections

• show DBS

• use demo

• DB dot employee dot find

What happens when both conditions in a NOR query fail?

• All documents are displayed

• Only documents meeting one condition are displayed

• Only documents failing both conditions are displayed

• No documents are displayed

If a NOR query condition is partially satisfied, what is the expected outcome?

• No documents are displayed

• Only documents meeting the condition are hidden

• All documents are displayed

• Only documents failing the condition are displayed

Which of the following is NOT a valid use of the NOR operator?

• Filtering documents based on multiple conditions

• Selecting documents that meet all conditions

• Using it in conjunction with other logical operators

• Selecting documents that fail all conditions