Chapter 2.3, Problem 21CYU

Explanation of Solution

Difference between LL parser and LR parser:

LL parser	LR parser
The left to right is the meaning of first “L” and leftmost derivation is the meaning of second “L”.	The left to right is the meaning of first “L” and rightmost derivation is the meaning for “R”...

Explanation of Solution

Bottom-up parser:

• The “LR” parser is the bottom-up manner because, they construct a parse tree from the leaves up, recognizing when a collection of leaves can be joined together as the children of a single parent.
• It attempts to reduce the input string to start symbol of a grammar.
• It first looks at the lowest level of the parse tree and works up the parse tree by using the rules of grammar...

Explanation of Solution

Predictive parser:

• The “LL” parser is the predictive parser because, it has the capability to predict which production is to be used to replace the input string.
• It does not suffer from backtracking.
• A stack and a parsing table is used by the predictive parser to parse the input and generate a parse tree...

Explanation of Solution

LL and LR stands for:

• The “LL” stands for Left-to-Right, Leftmost derivation.
  • It first looks at the highest level of the parse tree and tree by using the rules of grammar, it works down the parse...