{"id":17209,"date":"2024-04-15T05:10:24","date_gmt":"2024-04-15T05:10:24","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=17209"},"modified":"2024-04-15T05:10:24","modified_gmt":"2024-04-15T05:10:24","slug":"in-lisp-the-function-returns-t-if-is-a-cons-cell-and-nil-otherwise-a-cons-b-consp-c-eq-d-cous-e-none-of-the-above","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/in-lisp-the-function-returns-t-if-is-a-cons-cell-and-nil-otherwise-a-cons-b-consp-c-eq-d-cous-e-none-of-the-above\/","title":{"rendered":"In LISP, the function returns t if <object> is a CONS cell and nil otherwise: A. (cons) B. (consp) C. (eq) D. (cous =) E. None of the above"},"content":{"rendered":"<p>[amp_mcq option1=&#8221;(cons)&#8221; option2=&#8221;(consp)&#8221; option3=&#8221;(eq)&#8221; option4=&#8221;(cous =) E. None of the above&#8221; correct=&#8221;option2&#8243;]<!--more--><\/p>\n<p>The correct answer is B. (consp)<\/p>\n<p>(consp) is a function in Lisp that returns t if its argument is a cons cell and nil otherwise. A cons cell is a special type of data structure in Lisp that consists of two parts: a car and a cdr. The car is the first element of the cons cell, and the cdr is the rest of the cons cell.<\/p>\n<p>The following are examples of cons cells:<\/p>\n<p>(cons 1 2)<\/p>\n<p>(cons &#8216;a &#8216;b)<\/p>\n<p>(cons &#8216;(1 2 3) &#8216;(4 5 6))<\/p>\n<p>The following are examples of objects that are not cons cells:<\/p>\n<p>1<\/p>\n<p>&#8216;a<\/p>\n<p>(1 2 3)<\/p>\n<p>(4 5 6)<\/p>\n<p>To test whether an object is a cons cell, you can use the (consp) function. For example, the following code will return t because the object (cons 1 2) is a cons cell:<\/p>\n<p>(consp (cons 1 2))<\/p>\n<p>The following code will return nil because the object 1 is not a cons cell:<\/p>\n<p>(consp 1)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[amp_mcq option1=&#8221;(cons)&#8221; option2=&#8221;(consp)&#8221; option3=&#8221;(eq)&#8221; option4=&#8221;(cous =) E. None of the above&#8221; correct=&#8221;option2&#8243;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[676],"tags":[],"class_list":["post-17209","post","type-post","status-publish","format-standard","hentry","category-artificial-intelligence","no-featured-image-padding"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>In LISP, the function returns t if  is a CONS cell and nil otherwise: A. (cons) B. (consp) C. (eq) D. (cous =) E. 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