The function to evaluate the value of a polynomial,l for a constant value of the independent variable(say a) in the polynomial is ______

polyval(c,a), c is a row vector

What happens if we don t assign a variable to an expression which evaluates a numerical value?

The evaluated values are assigned to a variable ans automatically

How would you simplify log(x20) log(x13) log(x7) in MATLAB? (Assume x is defined as a string variable)

simplify(log(x20)-log(x13) log(x7))

simplify(log(x20)-log(x13) log(x7));

simplify(log(x20)-log(x13) log(x7), IgnoreAnalyticConstraints ,true)

simplify(log(x20)-log(x13) log(x7))

In the function vpa( 981 ,10), why do we put 981 within inverted commas?

We do it to get a floating-point approximated value, approximated to 14 digits

We can choose to not put the value within a pair of single inverted comma

We do it so that we don t get an approximated value

We do it to get the exact value as MATLAB computes exact values, of numerical expressions, when declared within a string

We do it to get a floating-point approximated value, approximated to 14 digits

What is the difference between syms x and sym x ?

syms x makes the symbol short lasting while sym x makes the declaration long lasting

there is no difference, they are the same functions

syms x makes the declaration long lasting while sym x makes the declaration short lasting

syms x makes the symbol short lasting while sym x makes the declaration long lasting

Explore topic-wise MCQs in Matlab.

This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Matlab knowledge and support exam preparation. Choose a topic below to get started.

1.	The function to evaluate the value of a polynomial,l for a constant value of the independent variable(say a) in the polynomial is ______
A.	poly(p,a), p is a row vector
B.	polyder(p)
C.	polyint(p)
D.	polyval(c,a), c is a row vector
Answer» E.

Discussion

2.	What happens if we don t assign a variable to an expression which evaluates a numerical value?
A.	MATLAB shows error
B.	Nothing happens
C.	The evaluated values are assigned to a variable ans automatically
D.	Depends on the numerical value
Answer» D. Depends on the numerical value

Discussion

3.	How would you simplify log(x²⁰) log(x¹³) log(x⁷) in MATLAB? (Assume x is defined as a string variable)
A.	simplify(log(x<sup>20</sup>)-log(x<sup>13</sup>) log(x<sup>7</sup>));
B.	log(x<sup>20</sup>) log(x<sup>13</sup>) log(x<sup>7</sup>)
C.	simplify(log(x<sup>20</sup>)-log(x<sup>13</sup>) log(x<sup>7</sup>), IgnoreAnalyticConstraints ,true)
D.	simplify(log(x<sup>20</sup>)-log(x<sup>13</sup>) log(x<sup>7</sup>))
Answer» D. simplify(log(x<sup>20</sup>)-log(x<sup>13</sup>) log(x<sup>7</sup>))

Discussion

4.	In the function vpa( 9⁸¹ ,10), why do we put 9⁸¹ within inverted commas?
A.	We can choose to not put the value within a pair of single inverted comma
B.	We do it so that we don t get an approximated value
C.	We do it to get the exact value as MATLAB computes exact values, of numerical expressions, when declared within a string
D.	We do it to get a floating-point approximated value, approximated to 14 digits
Answer» D. We do it to get a floating-point approximated value, approximated to 14 digits

Discussion

5.	What is the difference between syms x and sym x ?
A.	there is no difference, they are the same functions
B.	they are equivalent
C.	syms x makes the declaration long lasting while sym x makes the declaration short lasting
D.	syms x makes the symbol short lasting while sym x makes the declaration long lasting
Answer» D. syms x makes the symbol short lasting while sym x makes the declaration long lasting

Discussion