2/3 of those will get you an interview. 3/3 will get you a job.
I had the same problem years ago. You must have a good "excuse" to not know these simple things. You studied it for the last 4-5 years and still don't know?!
It is a flaw in your CV. When I graduated (2011), I failed every algorithm interview. Passed in some that asked me other things, like Python / Bottle / Flask. At that time, I was a Bottle core contributor and had several Flask projects available.
I was too busy working on real projects (internships, startups, open source) and passed all the exams with low grades. My fault. It was a choice and I had to handle the consequences for some time. I don't regret this.
Being a "competitive coder" helps a lot, you have in your head every algorithm they'll ask. Some companies don't hire you without this knowledge. You have less options.