Answer / chaitanya

In Prolog, backtracking is a process adopted by Prolog.  When a sub-goal fails in Prolog, the Prolog system moves its steps backwards to the previous goal and tries to re-satisfy it. Backtracking enables Prolog to find all alternative solutions to a given query.

 Explain what is recursion in Prolog?

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 What is the process of creating new data types in lisp? a) List b) Structures c) Procedures d) None of the mentioned

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 What is the process of reserving a place in computer memory to store a value for a symbol? a) Storing b) Ranging c) Binding d) None of the mentioned

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 What is the output of the following statement? * (defun both-ends-with-special ()(setf whole-list (cons (first whole-list) (last whole-list)))) * (setf whole-list ‘(monday tuesday wednesday thursday friday)) * (both-ends-with-special) a) Monday b) Friday c) Wednesday d) Both a & b

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Which is used to build the lisp procedures? a) Data b) Primitives c) Definition d) None of the mentioned

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What is the difference between the appearance of macro and ordinary definition in LISP? a) Argument list b) Reture value c) Just the defining keyword d) None of the mentioned

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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))) a) Article b) c)  d) None of the mentioned

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

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 What is the output of the given statement? * (defstruct triangle (base 0) (altitude 0)) * (defun area (figure) (cond ((triangle-p figure) (* 1/2 (triangle-base figure) (triangle-altitude figure))))) * (setf triangle (make-triangle :base 2 :altitude 3)) * (area triangle) a) Triangle b) 7 c) 6 d) 10

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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 is used to construct new lists by linking the right pointers? a) Links b) List c) Variables d) Right pointers

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Explain what is the difference between bagof/3 and setof/3 predicate in Prolog?

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