Consider the Following Expression Grammar

question 22

Multiple Choice

Consider the following expression grammar. The seman-tic rules for expressioncalculation are stated next to each grammar production.
E ? number E.val = number. val
| E '+' E E(1) .val = E(2) .val + E(3) .val
| E '×' E E(1) .val = E(2) .val × E(3) .val
The above grammar and the semantic rules are fed to a yacc tool (which is an LALR (1) parser generator) for parsing and evaluating arithmetic expressions. Which one of thefollowing is true about the action of yacc for the given grammar?

• A)It detects recursion and eliminates recursion
• B)It detects reduce-reduce conflict, and resolves
• C)It detects shift-reduce conflict, and resolves the conflict in favor of a shift over a reduce action
• D)It detects shift-reduce conflict, and resolves the conflict in favor of a reduce over a shift action

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