Computer scienceFundamentalsSQL and DatabasesDBMSMongoDBOperations and operators

Array query operations

<code>$all</code> operator

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Suppose we have a collection named products that contains documents with an array field tags that lists the tags for each product. Which of the following queries would return all the products that have both the "electronics" and "smartphones" tags?

Select one option from the list

db.products.find({ tags: { $all: ["electronics", "smartphones"] } })

db.products.find({ tags: { $size: 2, $all: ["electronics", "smartphones"] } })

db.products.find({ tags: { $in: ["electronics", "smartphones"] } })

db.products.find({ tags: { $elemMatch: { $in: ["electronics", "smartphones"] } } })

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