LISP Questions & Answers – Class

This set of LISP Multiple Choice Questions & Answers (MCQs) focuses on “Class”.

1. Which makes it possible to define generic functions?
a) Lisp
b) CLOS
c) Class
d) Object-Oriented programming
View Answer

2. What is meant by collection of methods the same name?
a) Lisp class
b) Class
c) Generic function
d) None of the mentioned
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3. Which keyword is used to define the method?
a) Defun
b) Destruct
c) Demake
d) Defmethod
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4. Which class can help to select a method?
a) Nonoptional argument
b) Class
c) Method
d) None of the mentioned
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5. Which require sophisticated precedence computation?
a) Superclass
b) Multiple Superclass
c) Subclass
d) None of the mentioned
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6. What is the output of the given statement?

span class="sy0"> * (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) 3
d) 10
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7. What is the output of the given statement?

span class="sy0"> * (defstruct circle (radius 0))
* (defun area (figure) (cond ((circle-p figure) (* pi (expt (circle-radius figure) 2)))))
* (setf circle (make-circle :radius 11))
* (area circle)

a) 44
b) 380
c) 382
d) 380.132
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8. What is the output of the given statement?

span class="sy0"> * (defmethod area ((figure rectangle)) (* (rectangle-width figure) (rectangle-height figure)))

a) Area
b) Rectangle
c) Height
d) Error
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9. What is the output of the given statement?

span class="sy0"> * (defclass article() ((title :accessor article-title :initarg :title) (author :accessor article-author :initarg :author)))

a) Article
b) <STANDARD-CLASS
c) <STANDARD-CLASS ARTICLE>
d) None of the mentioned
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10. What is the output of the given statement?

span class="sy0"> * (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
d) <BUSINESS-ARTICLE {Random Number}>
View Answer

Sanfoundry Global Education & Learning Series – LISP Programming Language.

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