Race conditions are caused by which of the following conditions in a multi threaded system?

You want to listen on a port for some user-defined data stream. Would you use port 80?

The purpose of the poll() and select() system calls is to perform which of the following functions?

Which of the following provides the most random seed source for a pseudo random number generator?

Which type cast preserves the mathematical value in all cases?

Which choice is not a scalar data type?

When used as a return type, which Rust type plays a similar role to Python's None, JavaScript's null, or the void type in C/C++?

Which statement about lifetimes is false?

Defining a _ requires a lifetime parameter.

In matching patterns, values are ignored with _.

Which comment syntax is not legal?