MongoDB Mastering MongoDB for Beginners (Theory and Projects) - Quiz ($exists)

The video introduces a quiz focused on the use of the exist operator. It provides instructions for querying documents based on the presence or absence of specific fields, such as quantity and code. The video concludes with a prompt for students to solve the quiz and prepare for a discussion in the next video.

What is the main focus of the quiz discussed in the video?

• Comparison operators

• Logical operators

• Arithmetic operators

• Exist operator

Which data source is used for the quiz?

• exist quiz txt

• data quiz csv

• operators data json

• quiz data xml

What is the requirement for the first query in the quiz?

• Documents where code is not present

• Documents where quantity field is present

• Documents where code is present

• Documents where quantity is absent

What should be shown in the second query?

• Documents where both code and quantity are present

• Documents where code is present

• Documents where code is not present

• Documents where quantity is 20

What is the condition for the third query?

• Code is not present and quantity is absent

• Code is present and quantity is absent

• Code is not present and quantity is 20

• Code is present and quantity is 20