Consider the following collection in a MongoDB database:db.students.insertOne( {sno: 1, age: 20, name: "Amy", address: "38 Glenpark Ave"})If we run the following query on this MongoDB database, which fields will this query return for the result?db.students.find({sno:{$in:[ '1', '6' ]}}, {name: 1, address: 1}). 试题 7选择一项或多项：a._idb.addressc.named.all other fields in the documentse.sno

Which of the following statements are true about the _id field in MongoDB? (Select all that apply.) A. The user must specify the _id field for each inserted document.B. The _id field is required for each document.C. The _id field must be unique.D. The _id field is automatically included and populated with an ObjectId if the _id field is omitted in an inserted document.

Which of the following is used to interact with MongoDB in Node.js?(1 Point)mongoosesequelizeknexall of the above

What is the query that retrieves all documents in the inventory collection where the status equals "A" and qty is less than 30:Pick ONE optiondb.inventory.find({ status: "A", qty: { $lt: 30 } }db.inventory.find({ status” “A”, and, qty: {$lt: 30 }})db.inventory.find({ status” “A” and qty: {$lt: 30 }})All of them

commands in mongodb

Count documents in a collectionIn the video, you learned that a MongoDB database can consist of several collections. Collections, in turn, consist of documents, which store the data.You will be working with the Nobel laureates database which we have retrieved as nobel. The database has two collections, prizes and laureates. In the prizes collection, every document correspond to a single Nobel prize, and in the laureates collection - to a single Nobel laureate.Recall that you can access databases by name as attributes of the client, like client.my_database (a connected client is already provided to you as client). Similarly, collections can be accessed by name as attributes of databases (my_database.my_collection).Use the console on the right to compare the number of laureates and prizes using the .count_documents() method on a collection (don't forget to specify an empty filter document as the argument!), and pick a statement that is TRUE.