This question runs in a pre-configured Salesforce environment - no personal connection required.
Write a method that uses SOQL GROUP BY to create a summary report of contacts by department. The method should return a Map<String, Integer> where the key is the department name and the value is the count of contacts in that department. Only include departments that have at least one contact.
This challenge tests your ability to use SOQL aggregation functions with GROUP BY to summarize data and work with Map collections.
Examples
Input: None (method queries all contacts)
Output: {
'Technology' => 6,
'Executive' => 5,
'Sales' => 3,
'Operations' => 4,
'Product' => 3,
'Finance' => 1,
'R&D' => 2,
...
}
Explanation: Returns count of contacts grouped by department
Input: If all contacts have null departments
Output: {}
Explanation: Returns empty map when no departments are defined
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