Related Questions

Consider the following grammar G: P → Q + R | Q – R | Q | R Q → q | r R → r | s where P, Q, and R are non-terminal symbols, and q, r, and s are terminal symbols. Which of the following statement(s) is/are correct? S1. LL(1) can parse all strings that are generated using grammar G S2. LR(1) can parse all strings that are generated using grammar G
Consider the following grammar G S → F | H F → p | c H → d | c Where S, F, and H are non-terminal symbols, p, d, and c are terminal symbols. Which of the following statement(s) is/are correct? S1. LL(1) can parse all strings that are generated using grammar G S2. LR(1) can parse all string that are generated using grammar G
Let L(R) be the language represented by regular expression R. Let L(G) be the language generated by a context free grammar G. Let L(M) be the language accepted by a Turing machine M. Which of the following decision problems are undecidable? I. Given a regular expression R and a string w, is w ∈ L(R)? II. Given a context-free grammar G, is L(G) = ϕ? III. Given a context-free grammar G, is L(G) = ∑* for some alphabet ∑? IV. Given a Turing machine M and a string w, is w ∈ L(M)?  
Let L1, L2 be any two context-free languages and R be any regular language. Then which of the following is/are CORRECT? I. L1 ∪ L2 is context-free II. L̅1 is context-free III. L1 – R is context-free IV. L1 ∩ L2 is context-free
Consider the following statements. S1 : Every SLR(1) grammar is unambiguous but there are certain unambiguous grammars that are not SLR(1). S2 : For any context-free grammar, there is a parser that takes at most O(n3) time to parse a string of length n. Which one of the following option is correct?
Consider the following languages L1 = {ap | p is a prime number} L2 = {anbmc2m | n ≥ 0, m ≥ 0} L3 = {anbnc2n | n ≥ 0} L4 = {anbn | n ≥ 1} Which of the following are CORRECT? I. L1 is context-free but not regular. II. L2 is not context-free III. L3 is not context-free but recursive. IV. L4 is deterministic context-free
Which of the following statement(s) is/are FALSE? (i) Language L1 = {anbmcndm, n ≥ 0, m ≥ 0} is not context free grammar. (ii) Language L2 = {anbncn, n ≥ 0} is a context free grammar.
Which of the following statements are true of the teaching of grammar. A. Teaching of rules at the initial stage does not lend much to language learning. B. Rules of grammar are essential during the formative years of language learning. C. Grammar teaching should move from meaning to form. D. Grammar teaching should move from form to meaning. 
A teacher in her grammar class introduces the grammar item in a text and in single sentences and draws the attention of learners to its use through lots of examples and activities by learners. Once the learners are able to use the language item in context, she familiarizes the rules of the grammatical in order to internalize the form. What is this process of teaching-learning grammar known as?
The __________ running time of CYK is O(n3 .|G|) where n is the length of the parse string and |G| is the size of the context free grammar G.