Q1: A compiler for a high-level language that runs on one machine and produces code for a different machine is called is

ANS:C - cross compiler

A cross compiler is a compiler capable of creating executable code for a platform other than the one on which the compiler is running.

A one-pass compiler is a compiler that passes through the source code of each compilation unit only once.

A multi-pass compiler is a type of compiler that processes the source code or abstract syntax tree of a program several times. A one-pass compilers is faster than multi-pass compilers.