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.

Which is used to build the lisp procedures?

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 Which keyword is used to construct an array in LISP? a) Array b) Make-array c) Bins d) Make

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 Which primitive removes all but the last element from the list? a) Last b) First c) Remove d) Revoke

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Which creates reader procedures for getting things out of an instance fields? a) Structure in LISP b) Defstruct c) Class d) Object

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Mention how many types of variables available is LISP? Explain what are the variables that are bound, and that have values assigned to them?

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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)) * (person-personality person-instance-2) a) Female b) Nice c) Person d) Both a & b

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 What is the output of the given statement? * (setf pressure -3) * (when-plusp pressure (print ‘alarm)); a) T b) Nil c) Alarm d) None of the mentioned

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 Explain LISP-Vectors?

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

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Which do not evaluate their arguments in LISP? a) List b) Procedure c) Setf d) Macros

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 Which is a procedures supplied by user in terms of primitives? a) Custom b) User-defined c) Definite d) All of the mentioned

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 Explain why PROLOG language is stated as a procedural language?

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