Pretty printing and cursor behavior in MongoDB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to pretty print all documents from the 'users' collection.

MongoDB

db.users.find().[1]()

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

Apretty

BtoArray

Ccount

Dlimit

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'toArray()' instead of 'pretty()' which returns an array but does not format output.

Using 'count()' which returns the number of documents, not the documents themselves.

The 'pretty()' method formats the output for easier reading in the MongoDB shell.

2fill in blank

medium

Complete the code to get the first 5 documents from the 'orders' collection.

MongoDB

db.orders.find().[1](5)

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

Askip

Bpretty

Climit

Dcount

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'skip()' which skips documents but does not limit the number returned.

Using 'count()' which returns the number of documents, not the documents themselves.

The 'limit()' method restricts the number of documents returned by the query.

3fill in blank

hard

Fix the error in the code to convert the cursor to an array.

MongoDB

const docs = db.products.find().[1]()

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

AtoArray

Bpretty

Ccount

Dlimit

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'pretty()' which formats output but does not convert to array.

Using 'count()' which returns the number of documents.

The 'toArray()' method converts the cursor to an array of documents.

4fill in blank

hard

Fill both blanks to skip the first 3 documents and limit the result to 4 documents.

MongoDB

db.sales.find().[1](3).[2](4)

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

Askip

Blimit

Cpretty

Dcount

Attempts:

3 left

💡 Hint

Common Mistakes

Reversing the order of 'skip' and 'limit' which changes the result.

Using 'pretty' or 'count' which do not control skipping or limiting.

The 'skip()' method skips documents, and 'limit()' restricts the number returned.

5fill in blank

hard

Fill all three blanks to pretty print documents from 'inventory', skip 2, and limit to 3.

MongoDB

db.inventory.find().[1]().[2](2).[3](3)

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

Apretty

Bskip

Climit

Dcount

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'count()' which does not affect output formatting or cursor behavior.

Changing the order of methods which affects the result.

Use 'pretty()' to format output, 'skip()' to skip documents, and 'limit()' to restrict the number returned.