GATE CSE 2002 | Question: 2.18

Question

The C language is:

• A. A context free language
• B. A context sensitive language
• C. A regular language
• D. Parsable fully only by a Turing machine

Comments

https://www.geeksforgeeks.org/c-language-set-3/

Answer 1

Answer is (B).

All modern programming languages are CSL. Because they contain two features which cannot be handled by PDA.

The features are:

• variable declared before use and
• matching formal and actual parameters of functions.

Comments

See this question
https://gateoverflow.in/463/gate2008-51

---

For anyone wondering, this (both context sensitive constructs) is mentioned explicitly in the compilers dragon book.

Answer 2

Answer: (B)

Ref: http://trevorjim.com/c-and-cplusplus-are-not-context-free/

Comments

Reference link is not working.

I found C is a CFG language.

http://poj.org/problem?id=3220

---

@Arjun sir, According to the accepted answer of  http://stackoverflow.com/questions/14589346/is-c-context-free-or-context-sensitive  the answer should be D too ??

---

that is telling about C++ and reason being templates. C grammar should be context sensitive..

---

@Arjun SIR
What about JAVA  and Python ?  How to answwer this kind of questions ? :(

Answer 3

ans b)

Comments

Your answers are $WORST$ on GO