Question

What notation should we use for denoting the breadth of an array?

(a) sizeof(a[0])

(b) sizeof(a)

(c) sizeof(a[])

(d) sizeof(a.0)

The question was posed to me in an online interview.

My doubt stems from The sizeof() Function in chapter Arduino Programming of Arduino

Answer 1

Correct choice is (a) sizeof(a[0])

Best explanation: When the first element of an array is invoked in the sizeof() function, if the array is a 2D array then it will give the number of elements present in the breadth of the matrix.