MongoDB Mastering MongoDB for Beginners (Theory and Projects) - Solution ($eq)

The video tutorial guides students through a MongoDB quiz, emphasizing the importance of understanding basic concepts before proceeding. It covers creating a collection, inserting records, and querying documents based on specific criteria such as quantity, code, and tags. The instructor highlights the flexibility of MongoDB queries and encourages students to explore different solutions.

What should you do if you find the quiz challenging?

• Skip to the next module

• Review the lectures from the start

• Ignore the quiz and move on

• Ask a friend for help

Which command is used to find documents with a specific quantity in MongoDB?

• DB.collection.search({quantity: 15})

• DB.collection.query({quantity: 15})

• DB.collection.find({quantity: 15})

• DB.collection.lookup({quantity: 15})

How can you access a nested field in a MongoDB document?

• Use a special function

• Use a wildcard

• Use square brackets

• Use the dot notation

What is the correct way to query documents with a specific code in a nested object?

• DB.collection.find({item.code: '000'})

• DB.collection.find({'item.code': '000'})

• DB.collection.find({code: '000'})

• DB.collection.find({item: {code: '000'}})

How does MongoDB handle queries on fields that are lists?

• It matches the entire list

• It checks each element in the list

• It ignores lists

• It only matches the first element

What happens if you query for a tag that is nested within another list?

• The document is never returned

• The document is returned if the tag is in any list

• The document is returned if the tag is at the top level

• The document is always returned

What is the significance of using the EQ operator in MongoDB queries?

• It is used for equality checks

• It is used for sorting

• It is used for counting

• It is used for updating