Adbase Quiz8

What method is used to insert a single document in MongoDB?

• insertOne

• updateOne

• insertMany

• deleteOne

What happens in ordered inserts if a document halfway through the array produces an error?

• No documents beyond that point in the array will be inserted

• All documents will be inserted regardless of errors

• All documents beyond that point in the array will be inserted

• None of the above

Which method is used to delete all the documents that match a filter in MongoDB?

• deleteOne

• insertOne

• deleteMany

• updateOne

What method is used to change a document with a new one in MongoDB?

• updateOne

• updateMany

• deleteOne

• replaceOne

Which operator is used to set the value of a field in MongoDB?

• $not

• $unset

• $regex

• $set

What is the purpose of the $in operator in MongoDB?

• To provide regular expression capabilities for pattern matching strings

• To query for any of the given values across multiple keys

• To match all documents that don’t match a given pattern

• To query for a variety of values for a single key

What does the $not operator do in MongoDB?

• Matches any array with the number of elements specified by the argument

• Provides regular expression capabilities for pattern matching strings

• Matches elements of an array based on a condition

• Finds all documents that don’t match a given pattern

What is the purpose of the $size operator in MongoDB?

• Matches elements of an array based on a condition

• Provides regular expression capabilities for pattern matching strings

• Finds all documents that don’t match a given pattern

• Matches any array with the number of elements specified by the argument

What is the purpose of the $slice operator in MongoDB?

• Matches any array with the number of elements specified by the argument

• Returns a subset of elements for an array key

• Provides regular expression capabilities for pattern matching strings

• Matches elements of an array based on a condition

What is the main challenge in data modeling in MongoDB?

• None of the above

• Balancing the need of the application

• Enforcing document structure

• Determining and declaring a table's schema