[WalterGR]

To "which language would be the easiest and fastest to write code that involves queues, stacks, linked lists, binary trees, etc." you need to add the qualifier that it's used commonly enough that interviewers understand it. (Of course, it's obvious from your question that's what you're asking.)

I love Lisps, but they're a risky choice. Python is a great choice. For the types of questions asked in interviews, a language like Java or C# is also a great choice.

Using a/the language of the company is effective. If you are strong in Python, Java, and C# (or whatever languages) then use what they use. Their language is usually indicated in the job listing.