C100DEV Exam Dumps | We have an accounts collection with only one document: { _id: 54657, account

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Question 12/87

We have an accounts collection with only one document: { _id: 54657, account_id: 557378, products: [ 'InvestmentStock', 'Commodity', 'CurrencyService' ] } We need to use Aggregation Framework to unwind the products Array to obtain new documents with only one product per document (see below). Expected output: [ { _id: 54657, account_id: 557378, products: 'InvestmentStock' }, { _id: 54657, account_id: 557378, products: 'Commodity' }, { _id: 54657, account_id: 557378, products: 'CurrencyService' } ] Which pipeline should you use?

A. [{ $facet: { path: "$products", } }]

B. [{ $unwind: { path: "$products", } }]

C. [{ $unset: { path: "$products", } }]

D. [{ $project: { path: "$products", } }]

Correct Answer: B

https://docs.mongodb.com/manual/reference/operator/aggregation/unwind/

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