I am good at passing these interviews and am at a faang (will be moving to another one this month). These interviews are useless and provide a false signal on problem solving skills and people's abilities to learn things. The interviews specifically don't test whether or not somebody can roll up their sleeves and jump into code, because if it did why do I as a new hire have to explain so much about software engineering and debugging practices to people who have been here so long?

If you've actually worked at a large company, you'd know that 90% of the real work is done by like 5% of people (maybe even less). If the interviews worked this ratio would be so much better.