HubSpot Software Engineer System Design Questions

Background: HubSpot is known for its product management and marketing tools, and an effective task management system helps teams stay organized and track their progress efficiently.
Problem statement: Implement a class called TaskManager that allows users to manage tasks. Each task should have an ID, title, description, and a status. The TaskManager should allow adding, removing, and updating tasks, as well as retrieving all tasks in a specified status.

• Function/class signature:

- def add_task(title: str, description: str) -> int:
- def remove_task(task_id: int) -> bool:
- def update_task(task_id: int, title: Optional[str] = None, description: Optional[str] = None, status: Optional[str] = None) -> bool:
- def get_tasks_by_status(status: str) -> List[Dict[str, Union[int, str]]]: Example 1:
Input: tm = TaskManager()
tm.add_task("Write documentation", "Create user guides and API docs")
Output: 1
Explanation: A new task is added, and the method returns its ID, which is 1.Example 2:
Input: tm.update_task(1, status="completed")
Output: True
Explanation: The status of the task with ID 1 is successfully updated to completed.Constraints:

• Task titles must be non-empty strings.


• Task IDs must be unique integers starting from 1.


• Status must be one of: ['pending', 'in_progress', 'completed'].


• The maximum number of tasks is 1000.


• Assume all inputs are valid without additional validations.