1. Consider the array: s( 0 ) = 7 s( 1 ) = 0 s( 2 ) = -12 s( 3 ) = 9 s( 4 ) = 10

Question

1. Consider the array:

s( 0 ) = 7

s( 1 ) = 0

s( 2 ) = -12

s( 3 ) = 9

s( 4 ) = 10

s( 5 ) = 3

s( 6 ) = 6

The value of s( s( 6 ) - s( 5 ) ) is:

a. 0.

b. 3.

c. 9.

d. 0.

2. Consider the program below:

a = [ ];

for i=1:10

a( i ) = i + 2;

end

result = 0;

for i=1:length(a)

result = result + a( i );

end

fprintf( ‘Result is: %d ’, result );

The output of this program will be:

a. Result is: 62.

b. Result is: 64.

c. Result is: 65.

d. Result is: 67.Analyze the following code (This is tricky!):

Main Program

radius1 = 3;

radius2 = 1;

[result1 result2] = twoCircles(radius1, radius2);

fprintf(‘The area of circle 1 with radius %.1f is %.1f’, radius1, result1);

fprintf(‘The area of circle 2 with radius %.1f is %.1f’, radius2, result2);

Function

function [res1 res2] = twoCircles(radius2, radius1)

radius1 = radius1 + 1;

radius2 = radius2 * radius1;

res1 = pi* radius1^2;

res2 = pi* radius2^2;

fprintf(‘The area of circle 1 with radius %.1f is %.1f’, radius1, res1);

fprintf(‘The area of circle 2 with radius %.1f is %.1f’, radius2, res2);

3. What radius1 is output in the main program?

a. 1

b. 2

c. 3

d. 4

e. none of the above

4. What radius2 is output in the main program?

a. 1

b. 2

c. 3

d. 4

e. none of the above

5. What radius1 is output in the function?

a. 1

b. 2

c. 3

d. 4

e. none of the above

6. What radius2 is output in the function?

a. 1

b. 2

c. 3d. 4

e. none of the above

7. Analyze the following code:

x = 2:2:10

plot(x, (2 .* x -1),’g^:’); %Remember order of precedence!

xlim([0 15]);

ylim([0 20]);

Multiple Choice questions would be asked on how this would exactly display in Matlab’s

figure window:

a. What are the tick marks on the x-axis

b. What are the tick marks on the y-axis

c. What style line?

d. What style markers?

e. What color is the line? What color are the markers?

f. How would I place a legend in the upper middle position?

8. If you had the following input file:

myInput.txt

Analyze the following code:

inFile = fopen(‘myInput.txt’);

oneLine1 = fgets(inFile);

oneLine2 = fgetl(inFile);

result = length(oneLine2) – length(oneLine1);

What is result?

a. 0

b. 1

c. 2

d. 3

Explanation / Answer

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