Ee206-matlab

+1

 

This is session provide a test sample exam. The objective is to provide some practice questions. You may write more questions and share them with your colleagues.
The semicolon ; is used for
a) Separating between rows in the matrices c) Separating between columns in the matrices
b) prevent presenting the outcome in the command window d) Both a and b.

The result of the following operation a=[ 1 2 3 ]^2 is
a) a= [ 2 4 6 ] c) a= [ 1 4 9 ]
b) a= [ 1 ; 4 ; 9 ] d) Error using the power operator

The result of the following operation a=[ 1 2 3 ].^2 is
a) a= [ 2 4 6 ] c) a= [ 1 4 9 ]
b) a= [ 1 ; 4 ; 9 ] d) Error using the power operator

This command c=1i+2; returns
a) Error because i is not defined c) Complex number equal to 3j
b) Complex number equal to 2+j d) Real number equal to 3×i

clc command is used for
a) Clear the command window c) Close the figure
b) Clear the current figure d) None of the above

The output of the following command [1:4:8 9] is
a) [ 1, 2, 3, 4 ; 5, 6, 7, 8 ; 9 ] c) [ 1 2 3 4 5 6 7 8 9]
b) [1; 2; 3; 4; 8 9] d) [ 1 5 9]

exp(x) is used for
a) returns the square for each element of x c) Multiply by 〖10〗^x
b) Returns the exponential for each element of x i.e. e^x d) Undefined function

round([-1.9, 3.4]) returns
a) [-1, 3] c) [-2; 3]
b) [-2, 3] d) Error of using the function

ceil([-1.9 3.4]) returns
a) [ -1 4] c) [-2 4]
b) [-1 3] d) [-2 3]

Apostrophes ‘ ’ are used for
a) Creating a text variable c) Separating between columns in a matrix
b) Create a vector d) None of the above

If the all following vectors have the same dimension, this command
plot(x1, x2, x3, y1, y2, y3) Plots:
a) x1 vs. y1, x2 vs. y2, and x3 vs. y3. In the same pane (figure) c) x1 vs. x2, x2 vs. y3 and y1 vs. y3. In three separated panes
b) x1 vs. y1, x2 vs. y2, and x3 vs. y3. In three separated panes d) None of the above

This function subplot(m,n,p) does the following
a) Plot m vs n vs p in a 3D graph c) Divides a new figure into m-by-n panels and active panel p.
b) Create a new figure window and plot in sub figure m d) Plots the vector m vs n and p

Assume the following matrices
a=[1 2 3 ; 6 5 4 ]; b=[ 1, 2; 4, 3]; c=[ 1 2 3 ;6 5 4; 7 8 9]; e=[7 8 9 ; 1 1 1];
The following Operation will return
a(4).*e(1,3)
a) 45 c) Error in indexing
b) 4 d) Dimensions are miss match

c(2,+e(2,1:end)
a) [7; 6; 5] c) Cannot use colon ( in indexing
b) [7 6 5] d) Dimension mismatch

size(a,2)
a) 2 c) [2 3]
b) 3 d) [3 2]

length(a)
a) 2 c) [2 3]
b) 3 d) [3 2]

a*c
a) [34 36; 38 64; 69 74] c) [34 36 38 ; 64 69 74]
b) Not defined because the dimensions are miss match d) None of the above

(a.*e)’
a) Not defined because the dimensions are miss match c) [7 6 16; 5 27 4]
b) [7 6; 16 5; 27 4] d) Error in using the apostrophe

sum(a)
a) [7 7 7] c) 21
b) [21] d) [6 ; 15]

find(a>c & a<6)
a) ans= [2; 4 ] c) ans= [2, 1; 2, 2 ]
b) ans= [6; 5 ] d) Error in using the function (Matrix dimensions must agree)

[r c]=find(rem(b,2)==0)
a)r= [2; 2]
c= [4;4 ] c) r= [2; 2]
c= [3;3 ]
b)r= [2; 2]
c= [ ] d) r= [2; 1]
c= [1;2 ]

(2<3||4.1>=4) results in:
a) 0 c) false
b) 1 d) NaN

Witch of the following in the right way to design a function called My_fun
a) Myfun=function (input)
b) function=Myfun(input)
c) [output]=My_fun(input)
d) None of the above is correct.

The following code results:

a) ans= x^4/4 c) ans= 6*x
b) plot the function f vs. x d) ans=x^2/2

 
The following code results:

a) x = [ 1 4 9 16 ] c) Cannot use i in for loop
b) x = [1i -1 1i -1 ] d) x= [16]


The following code returns

H= [1 0.5 0.333; 0.5 0.333 0.25 ]
H= [1 0.5 0.25; 0.5 0.25 1 ]
H= [1 0.5; 0.25 0.5; 0.25 1 ]
H=0.25

The following code returns

a) out= 3 c) Error in using the condition
b) out= 4 d) This is an infinite loop and no output

The following code returns

a) out= [ -1 0 1] c) out=[ -1 -1 1 ]
b) out=[-1 1 2 ] d) out=[ 0 2 1]

The following code returns

a) n=[ 1 2 3 4 5 ] c) n=5
b) n=[ 1 2 3 4 ] d) None of the above

The following code returns

a) Option1 c) Option3
b) Option2 d) Option4

 
Answers
Question Answer Question Answer Question Answer
1 d 11 d 21 d
2 d 12 c 22 b
3 c 13 a 23 c
4 b 14 b 24 c
5 a 15 b 25 a
6 d 16 b 26 a
7 b 17 c 27 b
8 b 18 b 28 d
9 a 19 a 29 c
10 a 20 d 90 a




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