MATLAB General MCQ 5

Question 1

In MATLAB, what is the default data type for numeric values?

Accepted Answer

double

Answer

MATLAB stores numeric values as double-precision floating-point (double) by default unless explicitly specified otherwise.

Question 2

Which function would you use to plot a function y = sin(x) over the range [0, 2π] in MATLAB?

Accepted Answer

x = 0:pi/100:2*pi; plot(x, sin(x))

Answer

You must first define a vector x with the desired range, then pass both x and sin(x) to the plot() function.

Question 3

What does 'NaN' represent in MATLAB?

Accepted Answer

Not a Number — an undefined or unrepresentable value

Answer

NaN stands for Not a Number and results from undefined operations like 0/0 or Inf - Inf.

Question 4

How do you suppress output in MATLAB when executing a command?

Accepted Answer

Add a semicolon (;) at the end

Answer

Appending a semicolon at the end of a statement suppresses the automatic display of its result in the Command Window.

Question 5

Which MATLAB function computes the Fast Fourier Transform of a signal?

Accepted Answer

fft(x)

Answer

fft(x) computes the discrete Fourier transform of vector x using the Fast Fourier Transform algorithm.

MATLAB - MATLAB Technical Computing Practice Test