It should be rather easy to tell if you had a good interview. As long as you prepared for the interview thoroughly
and made a good first impression, the hiring manager will not mince words about wanting you to work there. Look out for these positive affirmations. A good interview may end with the hiring manager delving into the specifics of the role and telling you about all the perks that come with the job. This includes a discussion about salary because this is extra information that would not come up if there was no intention to hire you. Another good sign is the interviewer taking you around the office to introduce you to everyone. You can also feel good about the conversation if you receive an invitation right there on the spot for a second interview. Finally, if the interview turns casual and you start talking about sports or movies, then the hiring manager is obviously comfortable with you. However, it is still important to remember that you can have a good interview and still not land the job. You always want to manage your expectations.