December 21, 2024
Smalltalk Exercises - Booleans
Smalltalk Exercises - Booleans
Clicking on the A graphic will go to the answer.
Question 1
Which object is returned after each of the following expression series is
evaluated in a Workspace?
What is the textual representation of the message answer?
(a)
('truth' = 'truth' ) & ('lies' = 'lies')
(b)
('truth' = 'truth' )not & ('lies' = 'lies')not
(c)
('truth' = 'truth' )not | ('lies' == 'lies')not
Question 2
What answer is returned after the following expression series is evaluated in a Workspace?
You can assume that aFrog and aToad are initialised instances.
(a)
aToad position - 10 == aFrog position |
(aToad colour = aFrog colour)
(b)
aToad position - 10 == aFrog position |
aToad colour = aFrog colour
(c)
(aToad position - 10 == aFrog position)
not & (aToad colour = aFrog colour) not
Question 3
What answer is returned after the following expression series is evaluated
in a Workspace?
(a)
var1 := 20.
var2 := var1 * 2.
(var2 - var1 >= var1) & (var2 > (var1 * 2))
(b)
x := 99.
y := 100.
((x + y) > (y * 2)) not & ((y - x) >= (x/x))
(c)
('true' == 'true') ~= true
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