Why managed databases matter in MongoDB - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to connect to a MongoDB database using the correct method.

MongoDB

const client = new MongoClient([1]);

Drag options to blanks, or click blank then click option'

A"mongodb://localhost:27017"

B"localhost:27017"

C"ftp://localhost:27017"

D"http://localhost:27017"

Attempts:

3 left

💡 Hint

Common Mistakes

Using HTTP or FTP protocols instead of MongoDB protocol.

Omitting the protocol prefix entirely.

The connection string for MongoDB starts with mongodb://. This tells the client how to connect to the database.

2fill in blank

medium

Complete the code to select the database named 'shopDB'.

MongoDB

const db = client.[1]('shopDB');

Drag options to blanks, or click blank then click option'

Adatabase

Bdb

CuseDatabase

DgetDatabase

Attempts:

3 left

💡 Hint

Common Mistakes

Using useDatabase which is not a method in the driver.

Using database which is not a method in the driver.

In MongoDB's Node.js driver, client.db('name') selects the database.

3fill in blank

hard

Fix the error in the code to insert a document into the 'products' collection.

MongoDB

await db.collection('products').[1]({ name: 'Pen', price: 1.5 });

Drag options to blanks, or click blank then click option'

AaddDocument

BinsertMany

Cinsert

DinsertOne

Attempts:

3 left

💡 Hint

Common Mistakes

Using insertMany when inserting a single document.

Using non-existent methods like addDocument or insert.

The correct method to insert a single document is insertOne. Other options are either incorrect or used for multiple documents.

4fill in blank

hard

Fill both blanks to find all documents in the 'orders' collection where the status is 'pending'.

MongoDB

const pendingOrders = await db.collection('orders').[1]([2]);

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Afind

BfindOne

C{ status: 'pending' }

D{ status: 'complete' }

Attempts:

3 left

💡 Hint

Common Mistakes

Using findOne which returns only one document.

Using the wrong filter object.

To get all matching documents, use find with a filter object specifying { status: 'pending' }.

5fill in blank

hard

Fill all three blanks to update the price of the product named 'Notebook' to 3.0.

MongoDB

await db.collection([1]).updateOne([2], { [3]: { price: 3.0 } });

Drag options to blanks, or click blank then click option'

A'products'

B{ name: 'Notebook' }

C$set

D'orders'

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong collection name.

Using an incorrect filter object.

Forgetting to use the update operator like $set.

We update one document in the 'products' collection where the name is 'Notebook'. The update operator $set changes the price.