Honesty is the best policy…
…unequivocally. Trying to cover something up simply doesn’t work. Everyone makes mistakes, even your boss, and if they’re worth working for, they’ll know that.
As the lead you should be the first to admit when you:
- are not going to make a deadline;
- did something silly that broke the build;
- are wrong;
- simply don’t know the answer to a question.
The last one is really important.