Compiler-Design

Question 24

Given the following expression grammar:

    E → E * F | F + E | F
    F → F - F | id

which of the following is true?

A	* has higher precedence than +
B	– has higher precedence than *
C	+ and – have same precedence
D	+ has higher precedence than *

Compiler-DesignGrammarGATE 2000

Question 24 Explanation:

The operator which is in low level that can have high preference.
Order of precedence is *, +, -.
Here * and + have equal preference, ‘-‘ can have higher precedence than + and *.

Correct Answer: B

Question 24 Explanation:

The operator which is in low level that can have high preference.
Order of precedence is *, +, -.
Here * and + have equal preference, ‘-‘ can have higher precedence than + and *.