Answer / chaitanya

Operator + can be used to negate goals; these are either sub-goals in the body of a rule or sub-goals of a query. We cannot negate facts or the heads of rules.

 Mention what are the two pre-defined packages used in LISP?

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What is the output of the given statement? * (setf toss ‘(heads tails tails tails heads tails)) * (delete ‘heads toss) * toss a) Heads tails b) Heads tails tails tails tails c) Heads d) None of the mentioned

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What is the output of the given statement in LISP? * (setf abc ‘(a b c) xyz ‘(x y z)) * abc a) A b) B c) ABC

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 Explain why matching variable is important in Prolog? What is the method to match variables?

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Explain what is slot and what are the most commonly used slot options?

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 What is the output of the following statement? * (setf meals ‘(breakfast lunch tea dinner)) * (cons (first meals) (last meals)) a) Breakfast b) Lunch c) Dinner d) Both a & c

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What is the output of the following statement? * (defun make (title author) (list (list ‘title title) (list ‘author author))) * (setf book (make ‘(Common Lisp) ‘(Guy steele))) a) Common Lisp b) Guy steele c) Make d) ((TITLE (COMMON LISP)) (AUTHOR (GUY STEELE)))

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What is the output of the given statement? * (defclass article() ((title :accessor article-title :initarg :title) (author :accessor article-author :initarg :author))) * (defclass computer-article (article) ()) * (defclass business-article (article) ()) * (defclass political-article (article) ()) * (setf articles (list (make-instance ‘business-article :title “Memory Prices down”))) a) Business article b) Political article c) Business article

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Which keyword is used to define macro procedures in LISP? a) Defun b) Demacro c) Defmacro d) None of the mentioned

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 Which symbol holds the first element and also an index in LISP? a) Nail b) Tail c) Initial d) All of the mentioned

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 What is the output of the following statement? * ( first (rest (first ‘((a b) (c d))))) a) a b) b c) c d) d

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Explain what is Local Variables?

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