CFG
Question 1 |
Which of the following features cannot be captured by context-free grammars?
Syntax of if-then-else statements | |
Syntax of recursive procedures | |
Whether a variable has been declared before its use | |
Variable names of arbitrary length |
Question 1 Explanation:
Context free grammars are used to represent syntactic rules while designing a compiler.
Syntactic rules not checking the meaningful things such as if a variable is declared before it use (or) not.
Like this, things are handled by semantic analysis phase.
Syntactic rules not checking the meaningful things such as if a variable is declared before it use (or) not.
Like this, things are handled by semantic analysis phase.
There is 1 question to complete.