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Working with Arrays in the Aggregation Pipeline: Test your skills

MongoDB 301: Aggregation Working with Arrays in the Aggregation Pipeline Exercise 4: Writing pipeline results to a new collection Working with Arrays in the Aggregation Pipeline: Test your skills
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  1. Question 1 of 6
    1. Question

    You are building an aggregate statement that will group data based on an array field. The statement will also provide a count of the number of documents in each group, with the data sorted in descending order based on the count. Which approach should you take when building the statement?

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  2. Question 2 of 6
    2. Question

    You are building an aggregate statement that uses the $merge operator to write the pipeline output to a new collection. Where in the pipeline should you position the $merge stage?

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  3. Question 3 of 6
    3. Question

    You are building an aggregate statement in the Aggregation Editor. You plan to use the $match operator to filter documents based on the values in the interests array field. You want to return all documents that include both the Software and Database array elements. Which expression should you use for the $match operator?

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  4. Question 4 of 6
    4. Question

    You are building an aggregate statement in the Aggregation Editor. You plan to use the $unwind operator to deconstruct the interests array. Which operator expression should you use?

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    Incorrect
  5. Question 5 of 6
    5. Question

    You are building an aggregate statement in the Aggregation Editor. You plan to use the $sortByCount operator to group values in the interests field and count the number of documents in each group. Which operator expression should you use?

    Correct
    Incorrect
  6. Question 6 of 6
    6. Question

    You are building an aggregate statement in the Aggregation Editor. You want to save the pipeline’s output to the reference collection in the marketing database. Which aggregate operator should you use?

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    Incorrect
  • Course Home Expand All
    Building a Basic Aggregation
    4 Topics | 1 Quiz
    Exercise 1: Filtering the documents in the aggregation pipeline
    Exercise 2: Grouping the documents in the aggregation pipeline
    Exercise 3: Sorting the documents in the aggregation pipeline
    Exercise 4: Adding processing options to the aggregation
    Building a Basic Aggregation: Test your skills
    Introducing the Aggregation Editor
    4 Topics | 1 Quiz
    Exercise 1: Importing an aggregate statement into the Aggregation Editor
    Exercise 2: Replace a field in the aggregation pipeline
    Exercise 3: Reorder the fields in the aggregation pipeline
    Exercise 4: Changing the sort order in the aggregation pipeline
    Introducing the Aggregation Editor: Test your skills
    Working with Arrays in the Aggregation Pipeline
    5 Topics | 1 Quiz
    Exercise 1: Using expression operators to filter input documents
    Exercise 2: Unwinding an array to create individual documents
    Exercise 3: Grouping array values and generating a document count for each group
    Exercise 4: Writing pipeline results to a new collection
    Working with Arrays in the Aggregation Pipeline: Test your skills
    MongoDB 301 Mid-Course Feedback
    Adding Lookup Data to the Aggregation Pipeline
    4 Topics | 1 Quiz
    Exercise 1: Adding lookup data to the aggregation pipeline
    Exercise 2: Converting string values in one of the lookup fields to integers
    Exercise 3: Adding a computed ratio field based on the converted lookup field
    Exercise 4: Limiting the number of returned documents
    Adding Lookup Data to the Aggregation Pipeline: Test your skills
    Working with Reschema for MongoDB
    4 Topics | 1 Quiz
    Exercise 1: Setting up a reschema unit that includes lookup data
    Exercise 2: Defining a target collection in the reschema unit
    Exercise 3: Adding and scheduling a task to create the target collection
    Exercise 4: Running an aggregate statement against the target collection
    Working with Reschema for MongoDB: Test your skills
    Reporting with Studio 3T Aggregations
    3 Topics | 1 Quiz
    Exercise 1: Creating a view based on an aggregation query
    Exercise 2: Exporting a collection as a .csv file for use by a third-party tool
    Exercise 3: Visualizing collection data in MongoDB Charts
    Reporting with Studio 3T Aggregations: Test your skills
    Course Extras
    Return to MongoDB 301: Aggregation
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