explain method for query analysis in MongoDB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to analyze a MongoDB query using the explain method.

MongoDB

db.collection.find({ name: 'Alice' }).[1]()

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

Aexplain

Bexecute

Crun

Danalyze

Attempts:

3 left

💡 Hint

Common Mistakes

Using run() or execute() instead of explain()

Forgetting to call the method with parentheses

The explain() method shows how MongoDB runs a query, helping you understand its performance.

2fill in blank

medium

Complete the code to get the execution stats of a query using explain.

MongoDB

db.collection.find({ age: { $gt: 25 } }).explain('[1]')

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

Aperformance

Bdetailed

Csummary

DexecutionStats

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'detailed' or 'summary' which are not valid verbosity options

Passing no argument or wrong string

The executionStats verbosity level provides detailed information about the query execution.

3fill in blank

hard

Fix the error in the code to correctly use explain with verbosity.

MongoDB

db.collection.find().explain([1])

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

AexecutionStats

B'executionStats'

C'detailed'

Dtrue

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the verbosity without quotes causing syntax error

Using invalid verbosity values

The verbosity argument must be a string inside quotes, like 'executionStats'.

4fill in blank

hard

Fill both blanks to explain a query with 'allPlansExecution' verbosity and filter by status 'active'.

MongoDB

db.users.find({ status: '[1]' }).explain('[2]')

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

Aactive

Binactive

CallPlansExecution

DexecutionStats

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong status value

Using wrong verbosity string

Use 'active' to filter users and 'allPlansExecution' to get detailed plan info.

5fill in blank

hard

Fill all three blanks to explain a query on 'products' collection filtering price > 100 with 'queryPlanner' verbosity.

MongoDB

db.[1].find({ price: { $[2]: 100 } }).explain('[3]')

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

Aproducts

Bgt

CqueryPlanner

Ditems

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong collection name

Using wrong operator like 'lt' or 'gte'

Using wrong verbosity string

The collection is products, the operator is gt for greater than, and verbosity queryPlanner shows the plan.