Question:
Consider the following ANSI C program:
int main() {
Integer x;
return 0;
}
Which one of the following phases in a seven-phase C compiler will throw an error?
Consider the following ANSI C program:
int main() {
Integer x;
return 0;
}Which one of the following phases in a seven-phase C compiler will throw an error?
Show Hint
Identifiers may pass lexical and syntax checks but still fail semantic analysis if their meanings are invalid in the language.
Updated On: Feb 3, 2026
- Lexical analyzer
- Syntax analyzer
- Semantic analyzer
- Machine dependent optimizer
Show Solution
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The Correct Option is C
Solution and Explanation
Step 1: Lexical analysis.
The token \texttt{Integer} is a valid identifier in C, so the lexical analyzer will not flag any error.
Step 2: Syntax analysis.
The statement \texttt{Integer x;} follows the syntactic form of a declaration, so the syntax analyzer accepts it.
Step 3: Semantic analysis.
In ANSI C, \texttt{Integer} is not a predefined type (unlike \texttt{int}). Since \texttt{Integer} has not been declared as a type using \texttt{typedef}, this results in a semantic error (undeclared type identifier).
Step 4: Conclusion.
Therefore, the error is detected during semantic analysis.
Final Answer: (C)
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