C100DBA CRUD Operations Practice Question

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✗

  $gt

  Why it's wrong here

  The $gt operator matches values strictly greater than the provided threshold. It does not include the threshold value itself in the results. This is a common source of bugs when developers require inclusive boundaries in their range searches, making $gte the correct choice for these requirements.

• ✗

  $ge

  Why it's wrong here

  $ge is not a valid MongoDB query operator. MongoDB uses the two-letter syntax $gte for 'greater than or equal to'. Using incorrect operator names will result in a query error, as the database engine does not recognize the shorthand and fails to process the filter as intended.

• ✓

  $gte

  Why this is correct

  The $gte operator is the standard comparison operator for matching values greater than or equal to a specified limit. It is inclusive of the value provided. This is the correct tool for standard range queries where the boundary value should be included in the returned result set.

• ✗

  $eq

  Why it's wrong here

  $eq is the equality operator. It only matches documents where the field value is exactly equal to the specified value. It is not suitable for range queries where you need to return multiple values that fall within a defined boundary, as it is too restrictive.