Final Exam: Review

Question 1

Define a computer program

Answer 1

a set of instructions to perform a task that processes input and output. It is composed of a source code and an executable

Question 2

List the 5 steps involved in computer programming

Answer 2

1. Designing
2. writing
3. debugging
4. validating
5. maintaining

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Question 3

List the three basic constructs (structures) used to program an any programing language

Answer 3

1. sequential
2. conditional
3. iterative

Question 4

State the fundamental problem of linear algebra

Answer 4

Ax=b solve for x

Question 5

Is trapz more accurate than riemann sums?

Answer 5

yes

Question 6

what is more accurate, diff or gradient

Answer 6

gradient

Question 7

When solving a linear system of equations, if the rank of the coefficient matrix equals the rank of the augmented matrix, an explicit solution will always exist?

Answer 7

False

Question 8

When solving a linear system of equations, if the rank of the coefficient matrix doesnt equal the rank of the augmented matrix, the system is undertimined

Answer 8

True

Question 9

What is an efficient way of solving a system of linear equations when the rank of the coefficient matrix is less than the number of unknowns?

Answer 9

A\b

Question 10

Can the mean function be used only to determine the mean value of a vector?

Answer 10

No

Question 11

What is trapz used for?

Answer 11

determine indefinite integral with O(h^2) accuracy

Question 12

What two commands can be used to calculate least squares solutions?

Answer 12

polyfit and \

Question 13

What two commands can be used to enable the calculation of intermediate values in a given data set?

Answer 13

ineterp1 and polyfit

Question 14

Commands to from a large excel file named data.xls assign the contents of cells A1 through A10 to the array my data

Answer 14

MyData=xlsread(‘data.xls’,’A1;A10’)

Question 15

Commands to test a variable, y, to determine if it is between 0 and 5, inclusive of the end points

Answer 15

if y>1 & y<5
then g=1
end

Question 16

Commands if given two vectors t and h, determine the maximum value of ha and the corresponding value of t

Answer 16

[x,y]=max(h)

maxt=t(x)

Question 17

Commands to determine the number of rows and columns and pages in the matrix, NoisyPic

Answer 17

size(NoisyPic)

Question 18

For a flow chart, what are the shapes of the boxes?

Answer 18

Start and end = circle
If states = triangles
command statements = rectanges
display = slanted rectangle
else = slanted rectangle

Question 19

What is the curve fit equation for logarithmic?

Answer 19

u=logx
v=y
[p,s]=polyfit(u,v,1)