# Scilab test – Spoken Tutorial Quiz Answers

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## Scilab test – Spoken Tutorial Quiz Answers

Q1. If E = [5 19 15;8 22 36], What is the output of E(1,2)

• a. 15
• b. 36
• c. 22
• d. 19
`Ans:-  d. 19  `

Q2. The default variable to store the answer is?

Select one:

• a. None of the above
• b. y
• c. ans
• d. result
• e. x
`Ans:-    c. ans `

Q3. If, in an 1d-ODE ydot = cos(t) independent variable’s range is defined as t = -%pi:%pi and initial condition is given as y(0) = 0, on solving and on plotting ‘y’ versus ‘t’ the output will of the form,

• a. y=sin(t)
• b. None of the above
• c. y=cos(t)
• d. Error while integrating
`Ans:- d. Error while integrating `

Q4. What is the output of below program?

``````for i = 1:5
disp(i)
if (i==2),
break
end
end``````
• a. 1 2 3 4 5
• b. 1 2 3
• c. 1
• d. 1 2
`Ans:- d. 1 2 `

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Q5. Which of the following is true about functions in Scilab?

• a. They are all user defined
• b. None of the above
• c. User defined functions are a subset of all functions
• d. Functions do not have arguments
`Ans:- `

Q6. If P = [1 2 3;4 5 6], What is the output of length(p)

• 3
• 2
• 6
• 4
`Ans:- `

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Q7. What is the output of the following line of code?

counter = 0;
r=3;
for i=1:2;
if(r>=0 & counter==0)
disp(“1”);
counter=counter+1;
else if(r<0 & counter==0)
disp(“0”);
counter=counter+1;
else
disp(-1);
counter=counter+1;
end
end
end

• 0 0
• 1 -1
• Incorrect control instruction syntax
• -1 1e. 1 1
`Ans:-`

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Q8. In the scifunc block in xcos, what is the syntax to configure for two input/output?

• a. [1,1;2,2]
• b. [1,2]
• c. [1,1;1,1]
• d. [1,1;2,1]
• e. [1,1]
`Ans:- c. [1,1;1,1] `

Q9. In  plot2d(x,y,style=3), the style argument is used to

• a. customize the appearance of the plot
• b. Close the present window
• c. Open a new window for plot
• d. customize the appearance of the font
`Ans:-  a. customize the appearance of the plot `

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Q10. What is the output of the following line of code?
1D-1

• a. 0.01
• b. 0
• c. 0.1
• d. Undefined variable D
• e. Missing operator, comma, or semicolon
`Ans:-  `

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Q11. What is the significance of Final Integration Time in xcos?

• a. None of the above
• b. There is no such thing as Final Integration Time in xcos
• c. It defines how long the simulation will run
• d. It defines the integration upper limit
• e. It defines after how much time the simulation will start
`Ans:-  c. It defines how long the simulation will run `

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Q12. How do you create an identity matrix of 3 by 3

Select one:

• a. ones(3,3)
• b. zeros(3,3)
• c. iden(3,3)
• d. eye(3,3)
`Ans:-  d. eye(3,3) `

Q13. Which statements below are true with respect to Scilab?
a. Runs only on Linux
b. Is used for numerical computation

• a. Only a
• b. None of the above
• c. Only b
• d. Both a and b
`Ans:-  c. Only b `

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Q14. If P =[ 1 2 3;4 5 6], P(1,:) extracts

• a. First row ie 1 2 3
• b. Second row ie 4 5 6
• c. First column ie 1 4
• d. Second column Ie 2 5
`Ans:- a. First row ie 1 2 3 `

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Q15. What is the value of y1 and y2 in the following code?

r = linspace(1,5,9);
length(r);
[m,p]=max(r);
r = gsort(r);
y1=r(p-5);
y2=r(\$-5);

• a. y1 = 3.5; y2 = 3.5
• b. Syntax error
• c. y1 = 3.5; y2 = 1
• d. Undefined variable \$
• e. y1 = 1; y2 = 3.5
`Ans:- a. y1 = 3.5; y2 = 3.5 `

Q16. Execution of the command modulo(2,3) will return?

• a. 1
• b. 0
• c. 2
• d. NAN
• e. 0.67
`Ans:- (C) 2 `

Q17. Provide the character used to suppress the output of a command?

`Answer: Semicolon`

Q18. The output of the command p = poly(,’p’), will be

• a. Input Argument missing
• b. None of the above
• c. -1+p
• d. p=1
`Ans:- c. -1+p `

Q19. A block in Xcos with a red input port denotes?

• a. It is not configured yet
• b. It belongs to the electrical blocks category and requires a power source to be connected
• c. It is an event driven block
• d. It is not compatible with any block
• e. The block was not generated properly
`Ans:- c. It is an event driven block `

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Q20. If A=[1 2 – 1; – 2 – 6 4; – 1 – 3 3], What does the command inv(A) and spec(A) do respectively?

• a. Finds inverse and eigen value
• b. Finds Transpose and determinant
• c. Finds inverse and determinant
• d. Finds length and eigen value
`Ans:- a. Finds inverse and eigen value `

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Q21. i = 1:2:6 , will create a vector of values

• a. 1 2 3
• b. 2 4 6
• c. 1 3 5
• d. 4 5 6

Ans:- c. 1 3 5

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Q22. How do you find the square root of 49 on Scilab console?

Select one:

• a. sqroot(49)
• b. sqrrt(49)
• c. sqrt(49)
• d. squareroot(49)

Ans:- c. sqrt(49)

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Q23. For a given Matrix, P=[ 2 -4;-6 7] Find the trace of the Matrix P

Q24. If p = poly(,s) and q = poly([-1],s) and r = p+q, will give

Select one:

• a. 2
• b. s^2
• c. 1
• d. 2*s

Ans:-

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Q25. The new graphic window 1 for plotting can be opened by

Select one:

• (A) xset(‘window’,2)
• (B) xset(‘window’,1)
• (C) xset(‘window’,0,1)
• (D) xset(‘window’)

Ans:- (B) xset(‘window’,1)

Q26. Find the Determinant of the matrix [5 -2 3;4 -1 -5;6 7 9]

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Q27. In x=linspace(1,10,5)

Select one:

• a. x is a row vector with 10 points
• b. x is a row vector with 5 points with linearly equally spaced between 1 and 10
• c. x is a row vector with 15 points
• d. x is a column vector with 5 points with linearly equally spaced between 1 and 10

Ans:- (B) x is a row vector with 5 points with linearly equally spaced between 1 and 10

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Q28. If p = [1 2 3] , What is the output of length(p)

Select one:

• a. 0
• b. 4
• c. 3
• d. 2

Ans:- (C) 3

Q29. Which of the following is true about scripts(answer which suits best)

Select one:

• a. They do not have arguments
• b. They call functions
• c. They have arguments
• d. None of the above

Ans:-

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Q30. Identify the command used to save all commands used in a session to a .dat file.

Select one:

• b. None of the above
• c. save(‘dataab.dat’)
• d. gar(‘dataab.dat’)

Ans:-

Scilab test – Spoken Tutorial Quiz Answers – All the Answers Provided on this page are Correct if you think there is any mistake, Please comment, we will update it soon.

Q31. How do you create a matrix consisting of pseudo random number of 3 by 3

Select one:

• a. prand(3,3)
• b. random(3,3)
• c. Pseudo(3,3)
• d. rand(3,3)

Ans:- d. rand(3,3)

Q32. What command is used to exit from the middle of the loop in scilab?

Ans:- break

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Q33. What character is used to define a predefined numerical constant in scilab?

Ans:- %

Q34. Which command is used to list the available variables and functions in the current scilab workspace?

Select one:

• a. who
• b. var
• c. list
• d. which
• e. None of the above

Ans:-

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Q35. What command is used to skip the later part and continue with the loop?

Ans:- Continue

Q36. How do you calculate the determinant of square matrix ‘A’

• a. Det(A)
• b. Spec(A)
• c. det(A)
• d. A’

Ans:- c. det(A)

Q37. Command to find eigen values of a matrix A is?

Select one:

• a. roots(A)
• b. eigen(A)
• c. eye(A)
• d. None of the above
• e. spec(A)

Ans:- e. spec(A)

Q38. In  plot2d(x,y,style=3), the style argument is used to

Select one:

• a. customize the appearance of the plot
• b. customize the appearance of the font
• c. Close the present window
• d. Open a new window for plot

Ans:- a. customize the appearance of the plot

Q39. dentify the command used to generate all ones in a 4X4 matrix?

Select one:

• a. One(4,4)
• b. show(4,4)
• c. ones(4,4)
• d. zeros(4,4)

Ans:- c. ones(4,4)

Q40. The Rank of the matrix A=[4 7 2;9 6 3;1 7 3] is

Ans:- 3

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Q41. Identify the commands used to print a graph over existing graph in scilab?

Select one:

• a. x = 0 : 0.1 : 30; y = sin(x); plot(x, y);
• b. x = 0 : 0.1 : 30; y = co(x); plots(x, y);
• c. x = 0 : 0.1 : 30; y = tan(x); print(x, y);
• d. None of the above

Ans:- a. x = 0 : 0.1 : 30; y = sin(x); plot(x, y);

Q42. What does the command getd() do?

Select one:

• a. Opens all scilab files in the current directory
• b. Looks for all .sci file in the current directory and loads its content in workspace
• c. Outputs the full path of the current directory
• d. There is no such command as getd()
• e. Makes the current directory as the working directory

Ans:- b. Looks for all .sci file in the current directory and loads its content in workspace

Q43. if a=1, b=2, c=3, How do you find out the value of variable on Scilab console?

Select one:

• a. by typing a b c
• b. By typing a,b,c
• c. by typing a. b. c.

Ans:- b. By typing a,b,c

Q44. Which Palette contains Clock_C block?

Select one:

• (A) Signal routing
• (B) Event Handling
• (C) Continous time systems
• (D) Discreate time systems

Ans:- (B) Event Handling

Q45. If P =[ 1 2 3;4 5 6], What is the output of [r,c]=size(P)

Select one:

• (A) c=2, r=2
• (B) c=3, r=2
• (C) c=2, r=6
• (D) c=2, r=6

Ans:- (B) c=3, r=2

Q46. If A=[12-1;-2-64,-1-33], What does the command inv(A) and spec(A) do respectively?

Select one:

• a. Finds inverse and determinant
• b. Finds length and eigen value
• c. Finds Transpose and determinant
• d. Finds inverse and eigen value

Ans:- d. Finds inverse and eigen value

Q47. The command used for evaluating a polynomial at a specified point is:

Ans:- polyval

Q48. Identify the command used to generate all ones in a 4X4 matrix?

Select one:

• (A) zeros(4,4)
• (B) show(4,4)
• (C) One(4,4)
• (D) ones(4,4)

Ans:- (D) ones(4,4)

Q49. If vector v=1:5 ,then the last entry of vector v is be denoted by

Select one:

• (A) v(%)
• (B) v(1:\$)
• (C) v(\$)
• (D) v(\$:1)

Ans:- (C) v(\$)

Q50. In ‘Scilab’, the words ‘SCI’ and ‘LAB’ stand for

Select one:

• (A) Science and laboratory
• (B) Scientific and lab
• (C) Scientific and laboratory
• (D) Science and lab

Ans:- (C) Scientific and laboratory

Q51. Will the function return the input vector?

function y = same(x)
y = x(0:\$)
endfunction

Select one:

• (A) No
• (B) Yes

Ans:- (A) No

Q52. What is the use of plot2d3() command?

Select one:

• (A) To generate a continuous time 3D plot
• (B) To plot vertical bars of a given vector
• (C) To plot in 3D of a discrete signal
• (D) None of the above
• (E) To generate three 2D plots

Ans:- (B) To plot vertical bars of a given vector

Q53. If matrix A=[4 7 2;9 6 3;1 7 3] then A(:,[2 3]) is the submatrix containing

Select one:

• (A) 2nd and 3rd column
• (B) 1st, 2nd and 3rd columns
• (C) 1st and 2nd columns
• (D) 3rd column

Ans:- (A) 2nd and 3rd column

Q54. Which command is used to define a transfer function?

Select one:

• (A) tf()
• (B) syslin()
• (C) poly()
• (D) function()
• (E) linear()

Ans:- (B) syslin()

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