C100DEV Data Modeling — All Questions With Answers

{"user_id": 101, "orders": [{"id": 1, "total": 50}, {"id": 2, "total": 100}]}

{ "user": "alice", "orders": [ { "id": 1, "total": 50 }, { "id": 2, "total": 100 } ], "order_count": 2 }

db.collection.createIndex({ "tags": 1 })

{
  "product": "laptop",
  "specs": [
    { "k": "RAM", "v": "16GB" },
    { "k": "CPU", "v": "i7" }
  ]
}

{
  "_id": 1,
  "name": "Product X",
  "specs": [
    { "k": "color", "v": "blue" },
    { "k": "size", "v": "large" }
  ]
}

{
  "_id": "order_101",
  "customer_name": "John Doe",
  "shipping_address": "123 Main St",
  "tax_rate": 0.08,
  "total_price": 108.00
}

Refer to the exhibit: 
{ "_id": 1, "name": "UserA", "orders": [ { "id": 101, "total": 50 }, { "id": 102, "total": 100 } ] }