June 12, 2021

Errors in Input – 1 MCQ’s

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This set of MATLAB Multiple Choice Questions & Answers (MCQs) focuses on “Errors in Input – 1″.

1.What is the output of the following code?

A=[1 2 3]; A^2;

a) [1 4 9]
b) A= 1 4 9
c) A= [1, 4, 9]
d) Inputs must be a scalar or a square matrix

2. What will be the output of the following code?

A=sim(pi)+cod(pi)

a) A=-1
b) Undefined function or variable ‘cod’
c) Undefined function or variable ‘sim’
d) Undefined function or variable ‘sim’ and ‘cod’

3. What is the Output of the following code?

A=[1 1; 1 1]; A^2

a)

A = 2 2
    2 2

b)

A = 1 1
    1 1

c) Error using ^ To compute element wise POWER, use POWER (.^) instead
d) No output

4. What is the difference between the two codes?

a> P=[91,’pi’];
b> Q=[91,pi];

a) Code a initialises P as a character array while code b initialises Q as an integer array
b) Both P and Q will be integer arrays
c) Code b initialises P as a character array while code a initialises Q as an integer array
d) Both P and Q will be character arrays

5. What is the output of the following line of code?

			t=0:pi/8:4pi;

a) No output as we’ve closed the line of code with a semi-colon
b)

1      2        3        4        5        6        7       8        9
0    1.5708   3.1416   4.7124   6.2832   7.8540   9.4248  10.9956  12.5664

c) Error: Unexpected MATLAB expression
d) Undefined function or variable ‘pi’

6. What is the error in the code?

a=[[1;2];(2,3)]

a) Third brackets are wrong
b) The semicolon within the second third brackets
c) There is no error
d) Error: Expression or statement is incorrect–possibly unbalanced

7. What is the output of the following code?

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

a) c= [1 8]
b)

c = 1
    8

c) Inner Matrix dimensions must agree
d) No output since we have closed the line of code with a semicolon
View Answer

8. What is the output in the following code?

a=[[1;22],[53;9],[13;2]];

a) There is no output
b) Columns are to be introduced by placing semi-columns
c) Dimensions of matrices being concatenated are not consistent
d)

a = 1    53    13
   22     9     2

9. What is the output of the following code?

P=tan90

a) Inf
b) P = Inf
c) P = -1.9952
d) Undefined function or variable ‘tan90’

10. Why is the output, as shown, ‘poe’?

>>clipboard(‘paste’, ‘Do re Mi fa’)
ans =
      ‘poe’

a) ‘poe’ was initially in the clipboard
b) Cannot be determined
c) Error
d) The text gets changed

11. What is the output of the following code?

P=sin[90];

a) P = 1
b) P = .8932
c) P = .99999
d) Error

12. What is the output of the following code?

system(cmd)

a) Opens command prompt
b) Opens command prompt in a separate window
c) Opens command prompt in MATLAB
d) Error

13. What is the output of the following code?

clipboard('cut','Do re Mi fa')

a) Error due to syntax
b) Error due to command
c) Error due to cut
d) Cuts the portion of a text where ‘Do re Mi fa’ is written

14. What is the output for the following code?

if(a>b) p=9;

a) No output
b) Never will there be an output
c) a, b, p are not initialized
d) p=9

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