Which of these is also known as look-head LR parser?
LLR is the look ahead parser.
What is the similarity between LR, LALR and SLR?
The common grounds of these 3 parser is the algorithm but parsing table is different
An LR-parser can detect a syntactic error as soon as
LR parsers are a type of bottom-up parsers that efficiently handle deterministic context-free languages in guaranteed linear time.
Which of the following is incorrect for the actions of A LR-Parser I) shift s ii) reduce A->ß iii) Accept iv) reject?
Only reject out of the following is a correct LR parser action
If a state does not know whether it will make a shift operation or reduction for a terminal is called
As the name suggests that the conflict is between shift and reduce hence it is called shift reduce conflict
When there is a reduce/reduce conflict?
It occurs when If a state does not know whether it will make a reduction operation using the production rule i or j for a terminal.
When ß ( in the LR(1) item A -> ß.a,a ) is not empty, the look-head
There is no terminal before the non terminal beta
When ß is empty (A -> ß.,a ), the reduction by A-> a is done
The next token is considered in this case it’s a
The construction of the canonical collection of the sets of LR (1) items are similar to the construction of the canonical collection of the sets of LR (0) items. Which is an exception?
Closure and goto do work differently in case of LR (0) and LR (1)
A permanent database that has entry for each terminal symbols such as arithmetic operators, keywords, punctuation characters such as ‘;’, ‘,’etc Fields: Name of the symbol.