Lab Quiz Solutions, Foundations of Computing, Week 6 -- Thurs Nov 2 2000

For all questions, assume the following definitions have been executed:

(define s '(a b c d)) 

(define l '((a b) c d))  ;; That's the letter l (small L), not the numeral 1 (one)

Write down the value of each of these expressions:

1. s
(a b c d)
   
   
2. (car s)
a
   
   
3. (cdr s)
(b c d)
   
   
4. (cons 'a '(b c d))
(a b c d)
   
   
5. (cons (car s) (cdr s))
(a b c d)
   
   
6. (car (cdr s))
b
   
   
7. (cadr s)
b
   
   
8. l ;; That's the letter l (small L), not the numeral 1 (one)
((a b) c d)
   
   
9. (car l)
(a b)
   
   
10. (cdr l)
(c d)
    
    
11. (cons '(a b) '(c d))
((a b) c d)
    
    
12. (cons (car l) (cdr l))
((a b) c d)
    
    
13. (list '(a b) '(c d))
((a b) (c d))
    
    
14. (append '(a b) '(c d))
(a b c d)