MongoDB Developer Associate Practice Questions - MongoDB Associate Developer Certification Exam

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You want to create a compound index on the 'orders' collection to efficiently support queries that filter on 'customerId' and sort by 'orderDate' descending. Which command is correct?

db.orders.createIndex({ customerId: 1, orderDate: -1 }) db.orders.createIndex({ customerId: 1 }, { orderDate: -1 }) db.orders.addIndex({ customerId: 1, orderDate: -1 }) db.orders.createIndex({ customerId: -1, orderDate: 1 })

Correct Answer:

db.orders.createIndex({ customerId: 1, orderDate: -1 })

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