Coding test available library?

I heard that companies are introducing a lot of coding tests these days.

In an environment where tests are performed, whether online or offline,

I wonder how the package (library) is limited.

For example, can you use libraries such as numpy or pandas in Python?

If these don't work, I'd like to know if some of the others are available.

If you know other languages such as Java and C, please let me know!