Update Operations MCQ , MongoDB Update Practice Questions

Direction: Choose the correct option

Which method updates a single document that matches a filter?

A. db.collection.updateMany()

B. db.collection.replaceOne()

C. db.collection.update()

D. db.collection.updateOne()

Direction: Choose the correct option

What is the purpose of the `$set` operator in an update operation?

A. To rename a field

B. To increment a numeric field

C. To set the value of a field

D. To remove a field

Direction: Choose the correct option

How would you increment the 'views' field by 1 for a specific document?

A. {$mul: {views: 1}}

B. {$inc: {views: 1}}

C. {$add: {views: 1}}

D. {$set: {views: 'views+1'}}

Direction: Choose the correct option

What does `db.users.updateMany({}, {$set: {active: true}})` do?

A. Creates a new field only for the first document

B. Updates one user document

C. Sets the 'active' field to true for all user documents

D. Throws an error

Direction: Choose the correct option

Which operator is used to add an element to an array field?

A. $insert

B. $add

C. $addToSet

D. $push

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