1. What is a token?

		A character
		A group of characters
		A lexeme
		A category of lexemes
		A symbol, such as name, identifier, or literal

2. A grammar is ambiguous if it:

		Has two or more rules with the same nonterminal on their LHS's
		Has two or more rules with the same RHS
		A sentential form can produce two or more different parse trees
		Different sentential forms produce the same parse tree

3.

1. Which of the following does not belong to an attribute grammar?

   		Predicate functions
   		Semantic functions
   		Attributes
   		Inference rules

4.Which of the following sentences cannot be derived using the following EBNF: (Hint: look at the terminal symbols) --> {( + | - ) } --> {( * | / ) } --> a | b | c

		a * a + b * c
		a * ( b + c )
		a * b * c + a
		( a + b ) + (a + c)

5. The LHS of a context-free rule consists of:

		One terminal or one terminal and one nonterminal
		A combination of terminals and nonterminals
		Must have at least one nonterminal symbol
		Exactly one nonterminal symbol