SYNTAX ANALYSIS
ROLE OF THE PARSER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It can be constructed to recognize CFG corresponding to almost all programming constructs
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It does not backtrack
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It can be constructed to recognize CFG corresponding to almost all programming constructs & It does not backtrack
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None of the mentioned
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Detailed explanation-1: -According to Wikipedia, LR parsing appears to have advantages over LL: LR parsing can handle a larger range of languages than LL parsing, and is also better at error reporting, i.e. it detects syntactic errors when the input does not conform to the grammar as soon as possible.
Detailed explanation-2: -LR Parser is a class of Bottom-Up Parser that is used to parse Context-Free Grammars. LR Parsing is known as LR (K) parsing where. L represents Left to Right Scanning of Input. R represents Rightmost Derivation. K is the number of input symbols of Look ahead that are used in developing parsing decisions.
Detailed explanation-3: -There are three widely used algorithms available for constructing an LR parser: SLR(1) – Simple LR Parser: Works on smallest class of grammar. Few number of states, hence very small table.
Detailed explanation-4: -4. Which of these is true about LR parsing? Explanation: LR parsers are a type of bottom-up parsers that efficiently handle deterministic context-free languages in guaranteed linear time.