You have a log containing error logs from all different hardware at startup, made of hardware ID and error information. It contains multiple error logs for devices that try again. Write a method to remove the duplicates while keeping the first occurrence of the errors and all errors in the same relative order.

How would you manage heap memory for a process to do malloc and free?

You have a list of tasks to do, where some tasks depend on others. You have methods to 1. Get all tasks this task depends on 2. Get all tasks that depend on this task 3. Get time taken by this task. Write a method to give a valid ordering of tasks. Follow up- Write a method to find minimum time taken to finish all tasks if you can do infinite number of tasks in parallel.