Which of the following derivations does a top down parser while parsing an input string? The input is assumed to be scanned in left to right order.
Which of the following derivations does a top down parser while parsing an input string? The input is assumed to be scanned in left to right order.
The correct option is A Left most derivation
Left most derivations does a top down parser while parsing an input
string, the input is assumed to be scanned in left to right order.
Top-down parsing(LL):-
In top down parsing, we just start with the start symbol
and compare the right side of the different productions against the first piece
of input to see which of the productions should be used.
A top down
parser is called LL parser because it parses the input from Left to right, and constructs
a leftmost
derivation of the sentence.
Top-down parsing technique parses
the input, and starts constructing a parse tree from the root node gradually
moving down to the leaf nodes.
Left most derivations does a top down parser while parsing an input string, the input is assumed to be scanned in left to right order.
Top-down parsing(LL):-
In top down parsing, we just start with the start symbol and compare the right side of the different productions against the first piece of input to see which of the productions should be used.
A top down parser is called LL parser because it parses the input from Left to right, and constructs a leftmost derivation of the sentence.
Top-down parsing technique parses the input, and starts constructing a parse tree from the root node gradually moving down to the leaf nodes.
