October 9, 2023
October 9, 2023
October 9, 2023
###### Parsers
October 9, 2023
 Question 73
The ‘K’ in LR(R) cannot be :
 A 0 B 1 C 2 D None of these
Question 73 Explanation:
→ The name LR is often followed by a numeric qualifier, as in LR(1) or sometimes LR(k). To avoid backtracking or guessing, the LR parser is allowed to peek ahead at k lookahead input symbols before deciding how to parse earlier symbols.
→ Typically k is 1 and is not mentioned. The name LR is often preceded by other qualifiers, as in SLR and LALR. The LR(k) condition for a grammar was suggested by Knuth to stand for
“translatable from left to right with bound k.”
Question 73 Explanation:
→ The name LR is often followed by a numeric qualifier, as in LR(1) or sometimes LR(k). To avoid backtracking or guessing, the LR parser is allowed to peek ahead at k lookahead input symbols before deciding how to parse earlier symbols.
→ Typically k is 1 and is not mentioned. The name LR is often preceded by other qualifiers, as in SLR and LALR. The LR(k) condition for a grammar was suggested by Knuth to stand for
“translatable from left to right with bound k.”