Investigating Memory States In this question, we want to examine how the state o

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Investigating Memory States

In this question, we want to examine how the state of memory changes. When Maple evaluates an expression or equation, it uses the current values assigned to the variables.

We want to execute a series of Maple commands in a specific order. The Maple commands are displayed below in order. Each command has a specifc number associated with it. These line numbers will be used to refer to specific commands in the questions below.

All answers should be exact integer values.

(a) After executing the code up to line 7, what is the value of x when line 7 is evaluated?

  

(b) What is the result of executing line 7?

  

(c) After Executing the code in order to line 8, what is the result of this line?

  

(d) After Executing the code in order to line 11, what is the result of this line?

  

(e) Lines 8 and 11 contain the same expression. Which line caused the results of the two lines to differ?

  

(f) If we execute all the code up to line 12 and then execute only line 6, what will be assigned as the value of x?

  

Investigating Memory States

In this question, we want to examine how the state of memory changes. When Maple evaluates an expression or equation, it uses the current values assigned to the variables.

We want to execute a series of Maple commands in a specific order. The Maple commands are displayed below in order. Each command has a specifc number associated with it. These line numbers will be used to refer to specific commands in the questions below.

All answers should be exact integer values.

Line Number Maple Command 0 restart 1 a:=38 2 b:=35 3 c:=1 4 x:=30 5 y:=71 6 x:=a+b 7 x+73 8 y*c-72 9 y:=84 10 c=(c+b)*y 11 y*c-72 12 a:=c*x

(a) After executing the code up to line 7, what is the value of x when line 7 is evaluated?

  

(b) What is the result of executing line 7?

  

(c) After Executing the code in order to line 8, what is the result of this line?

  

(d) After Executing the code in order to line 11, what is the result of this line?

  

(e) Lines 8 and 11 contain the same expression. Which line caused the results of the two lines to differ?

  

(f) If we execute all the code up to line 12 and then execute only line 6, what will be assigned as the value of x?

  

Explanation / Answer

Dear a) 73     since at line 6: x = a + b = 38 + 35 = 73 b) 146     since x value is 73. so x + 73 = 146 c) -1     since at line 5: y = 71 and at line 3: c = 1, so y * c - 72 = 71-72 = -1     d) 253944     here y =84 and c = ( 1 + 35 ) * 84 = 3024     so y * c - 72 = 84 * 3024 -72 = 253944 e) both lines 9,10     because line 9 changes the y value and line 10 chages the c value. f) 220787    at line c=(c+b)*y = (1+35)*84 = 3024    and line 6: x= 73    so at line 12: a = c*x = 3024 * 73 =220752    again excutes line 6: x = a + b = 220752 + 35 =220787

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