10 minute LPs\n\n30 minute design question: Design an alarm clock\n - Alarm clock should be able to add, delete, and toggle on/off alarms\n - Alarm clock will ring at the correct time\n - Should be able to distinguish alarms and reminders\n - You will not write working code for this question. Just some language syntax and stubbed methods with comment description is fine. \n\nMy approach was as follows:\nMake a C++ alarm clock class and an event super class with alarm and reminder sub classes\nThe C++ alarm clock class will instantiate and own a timer thread and an interface thread. \nWill also have a hashmap of string, `vector<event>` . \nThe interface thread owns the standard input and waits for commands to come in, such as add, delete, toggle. \nThe timer thread polls at the start of every minute whether the current time is in the hashmap and then signals all of the alarms/reminders\nassociated with that time\nMy design allows minute granularity. \n\nI had some extra logic/data structures for enabling the toggling feature. \n\n\nCould someone let me know if I got to a reasonable answer or not? I don\'t even know if they were intending for me to use multithreading.\n\n\n5 minute thought question:\n- What is the difference between tech stack, tech queue, and tech minheap. Please list the unique benefits of each. I didn\'t know how to answer this one.

10 minute LPs\n\n30 minute design question: Design an alarm clock\n - Alarm clock should be able to add, delete, and toggle on/off alarms\n - Alarm clock will r