MCQ IN COMPUTER SCIENCE & ENGINEERING

Detailed explanation-1: -The parser analyzes the source code (token stream) against the production rules to detect any errors in the code. The output of this phase is a parse tree. This way, the parser accomplishes two tasks, i.e., parsing the code, looking for errors and generating a parse tree as the output of the phase.

Detailed explanation-2: -A parse tree or parsing tree or derivation tree or concrete syntax tree is an ordered, rooted tree that represents the syntactic structure of a string according to some context-free grammar.

Detailed explanation-3: -Parse tree is the hierarchical representation of terminals or non-terminals. These symbols (terminals or non-terminals) represent the derivation of the grammar to yield input strings. In parsing, the string springs using the beginning symbol.

Detailed explanation-4: -Explanation: The tree, known as “Parse tree” when used in a compiler, is the data structure of choice to represent the source program.

Detailed explanation-5: -A parser takes input in the form of sequence of tokens and produces output in the form of parse tree. Parsing is of two types: top down parsing and bottom up parsing.