Discussion
The parse tree and the abstract syntax tree differ in that the syntax tree
Answer: B
Correct answer: omits the nodes that carry no meaning beyond the grammar itself
A parse tree records every production applied, including the chains of single-child nodes that grammars need to express precedence and associativity. Most of those nodes convey nothing about the program.
An abstract syntax tree keeps only what matters - operators and operands - so it has fewer nodes, not more, and is the form later phases actually walk. Types are added by semantic analysis afterwards, and both trees are built by or from the parser.
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