MATLAB Mock Test 1 - Sanfoundry

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Question 1 of 10

1. Round each value in a duration array to the nearest number of seconds greater than or equal to that value.

t = hours(8) + minutes(29:31) + seconds(1.23);
t.Format = 'hh:mm:ss.SS'
t = 08:29:01.23   08:30:01.23   08:31:01.23
Y1 = ceil(t)
Y2 = ceil(t,'hours')

     Y1 =  08:29:01.23   08:30:01.23   08:31:01.23
     Y2 =  08:29:01.23   08:30:01.23   08:31:01.23

     Y1 =  08:29:02.00   08:30:02.00   08:31:02.00 
     Y2 =  08:29:01.23   08:30:01.23   08:31:01.23

     Y1 =  008:29:01.23   08:30:01.23   08:31:01.23
     Y2 =  09:00:00.00   09:00:00.00   09:00:00.00

     Y1 =  08:29:02.00   08:30:02.00   08:31:02.00 
     Y2 =  09:00:00.00   09:00:00.00   09:00:00.00

Question 1 of 10

Question 2 of 10

2. What is the difference between who and whos command?

There is no such function as who and whos

The latter shows the the names of the variables being used while the former shows the details of the variables in the ongoing program

No difference at all

The former shows the names of the variables being used while the latter shows the details of the variables in the ongoing program

Question 2 of 10

Question 3 of 10

3. What will be the output when the following code is written in MATLAB?

 u=sin(10);v=pi;whos

u and v are double with 8 bytes

error

u and v are double arrays

u and v are symbolic objects

Question 3 of 10

Question 4 of 10

4. What is the output of the following code?

pd=makedist('Uniform','-Inf',lower,'Inf',upper)

Error due to Inf

Error due to syntax

Makes a uniform distribution ranging from -Inf to Inf

Logical Error

Question 4 of 10

Question 5 of 10

5. Vectors depend upon brackets while scalars don’t.

False

True

Question 5 of 10

Question 6 of 10

6. Choose the correct option.

all() is ‘true’ if every element in a vector is non zero

all() is ‘true’ if every element in a vector is 0

any() is ‘true’ if elements in a vector is zero

any() shows all the elements in a matrix while all() shows every element of a vector

Question 6 of 10

Question 7 of 10

7. What is the output of the following code?

A=[1 2]; B=[1 4]; c=A*B;

No output since we have closed the line of code with a semicolon

Inner Matrix dimensions must agree

c = 1
    8

c= [1 8]

Question 7 of 10

Question 8 of 10

8. Which code shows the use of ellipsis in MATLAB?

  A = [1 2 3;...
      5 6 7]

A = [1:2..:2]

   A = [1;2..
        3;4]

A = [1;2’3]

Question 8 of 10

Question 9 of 10

9. Which symbol is used to initialise a variable?

init

Question 9 of 10

Question 10 of 10

10. An employer has to minimize the number of lines in a program while writing the code for a purpose. If the purpose is to find the root of the following equation, which function is to be used?

x²-4x+3=0

polyval()

solve[]

sol[]

roots([])

Question 10 of 10

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