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Which of the following statements about Regular Expression is/are incorrect? A. The union of two regular expressions is also a regular expression B. The concatenation of two regular expressions is also a regular expression C. The iteration of a regular expression is also a regular expression
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)?  
For the given Regular expression, the minimum number of variables including starting variable required to derive its grammar is: (011+1)*(01)*
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 manufacturing company produces 5 types of chairs in two sizes - Regular" and "Large". The pie charts represent the total number of five types of chairs produced and the table shows the ratio between the number of regular sized and large sized chairs of five types. Type of Chair A B C D E Ration between Number of Regular Size and Large Size Chairs 3 : 2 4 : 5 3 : 1 5 : 3 3 : 8   If the total number of all types of chairs produced is 7200, what is the total number of regular size chairs of all types produced.
Language L1 is defined by the grammar: S1 → aS1b|ϵ Language L2 is defined by the grammar: S2 → abS2|ϵ Consider the following statements: P: L1 is regular Q: L2 is regular Which one of the following is TRUE?
Consider the following two statements: P: Every regular grammar is LL(1) Q: Every regular set has LR(1) grammar Which of the following is TRUE?
Which of the following statements are true/false?
1. A minimum rate of wages for the time spent by employees for the production of output is minimum time rate.
2. Minimum piece rate is the rate based on the quantity of the output employees have produced.
3. The guaranteed time rate is a minimum rate of remuneration to apply in the case of employees employed on piece work for the purpose of securing to such employees a minimum rate of wages on a time work basis.
4. A minimum rate of remuneration to apply in the case of employees employed on piece work for the purpose of securing to such employees a minimum rate of wages on a time work basis is overtime rate.
A suit, a trouser, and a shirt are to be stitched from a cloth. The cloth required for the suit is the average of cloth required for trousers and shirt. The length of the cloth for suit is 1.5 times the cloth required for the shirt. The length of cloth required for shirt is 5 times the even prime number. Which of the following is/are correct? A. Cloth required for trousers is 20 m B. Average length of cloth required for all the dresses = Cloth required for suit C. Initially, the cloth was 45 m D. Cloth required for shirt is 15 m
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?