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));

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 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’?

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 Questions and Answers.

This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your MATLAB Questions and Answers 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(x20)-log(x13)–log(x7));
B.	log(x20) – log(x13) – log(x7)
C.	simplify(log(x20)-log(x13)–log(x7),’IgnoreAnalyticConstraints’,true)
D.	simplify(log(x20)-log(x13)–log(x7))
Answer» D. simplify(log(x20)-log(x13)–log(x7))

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