Write a grammar for the language consisting of strings over the alphabet {a,b} where all strings start with the letter a and can have a’s and b’s after.

Design a context-free grammar that accepts the language of all binary strings with at most one occurrence of 000.      Please type answer no write by hend.

What do you call the operation that begins at the start symbol of a grammar, runs through a series of productions, and terminates with a string that has reached its maximum length?

Construct a CFG and PDA for the language B={w| w is a string over {a,b} with the same count of a's and b's}. For example, abba € B, abab e B,aabb € B, babbbaaaba € B, that is, there is no particular order in which a's and b's appear in w as long as there is the same amount of them.

The set of strings with an equal number of a's, b's, c's and d's, in any random order, can be described by which kind of grammar? OA. A regular grammar B. A context-free grammar but not by any regular grammar C. A context-sensitive grammar but not by any context-free grammar OD. None of the above, since no grammar can generate this language