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 backtracking in Prolog?

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What is the process of arranging procedures into layers? a) Procedure b) Abstraction c) Abstraction layers d) Procedure abstraction

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 What is the output of the given statement? * (setf pressure 3) * (when-plusp pressure (print ‘alarm)); a) Alarm b) Alarm Alarm c) 1 d) Nil

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 What is the output of the given statement? * (defun when-plusp-with-bug (number result); (when (plusp number) result)); * (setf pressure -2) * (when-plusp-with-bug pressure (print ‘alarm)) a) Alarm b) Nil c) Both a & b d) None of the mentioned

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What is the output of the following statement? * (setf p .6) * (cond ((> p .75) ‘very-likely)((> p .5) ‘likely)((> p .25) ‘unlikely)(t ‘very-unlikely)) a) Very-likely b) Likely c) Unlikely d) Very-unlikely

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

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 Which require sophisticated precedence compputation? a) Superclass b) Multiple Superclass c) Subclass d) None of the mentioned

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Which is used to represent the prompt in lisp? a) # b) $ c) & d) *

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 What is the output of the given statement in LISP? * (setf bins (make-array 4 :initial-element ‘e)) * (aref bins 0) a) E b) 0 c) 4 d) None of the mentioned

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What is the output of the given statement? * (defstruct person (sex nil) (personality ‘nice)) * (setf person-instance-1 (make-person)) * (setf person-instance-2 (make-person :sex ‘female)) a) Person :sex female :personality nice b) Person :sex c) Sex:Female d) None of the mentioned

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Which enables storage in procedurally indexed places in LISP? a) Defstruct b) Object c) Structure d) None of the mentioned

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Which abstractions have a prescribed behavior? a) Auxiliary procedures b) Procedure abstraction c) Primary procedures d) None of the mentioned

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