The interviewer is interested in understanding your approach to task management and how you handle multiple priorities and deadlines. As a management assistant, you will be responsible for juggling a variety of tasks and ensuring that everything is completed on time. By asking about your prioritization and deadline management skills, the interviewer can gain insight into how you work under pressure and whether you have the organizational skills necessary to succeed in this role. It's important to provide specific examples of how you have effectively managed deadlines and prioritized tasks in the past, as this can demonstrate your ability to handle the demands of the job.